Anyone put an oil catch can on?

[Young Roids]

I forgot the exact purpose of these things, I think it is to keep oil out of the intercooler. Has anyone dune this mod?

[Haltech]

I havent seen any traces of this on a MS3.

[jam_asian85]

bump for updates soon to come :D

[rjs_speed3]

the purpose of the oil catch can is to catch excess blow by... newer cars dont need it, unless the engine is really old or has a TON of miles on it..

[jam_asian85]

the purpose of the oil catch can is to catch excess blow by... newer cars dont need it, unless the engine is really old or has a TON of miles on it..

Yea I know, its merely gonna be used for comestic purposes only :D

[driver311]

You guys are crazy. This car needs a catch can really bad. Mine and well as many others intercoolers and intake manifolds are full of oil. Its a know problem. Search.

[Andrade08]

You guys are crazy. This car needs a catch can really bad. Mine and well as many others intercoolers and intake manifolds are full of oil. Its a know problem. Search.
Yup, my cooler inlet had/has oil in it. My boost tube comming of the turbo had oil as well. Not a ton but it did puddle in low spots. Mazda tech said all MS3,MS6 and CX7s do it. Bad breather/PCV design. Just like the 99-04 Lightnings and the GOBS of oil they sucked into the intercooler bran new. I saw TONS of those things coated with oil. Alot of companies cashed in on that with oil catch devices.

[winniep]

You guys are crazy. This car needs a catch can really bad. Mine and well as many others intercoolers and intake manifolds are full of oil. Its a know problem. Search.

I agree 100% and haven't even had my intercooler off yet. It is a fact of life on turbo cars. I would imagine you would ESPECIALLY need a catch can after installing a FMIC, considering the forces of gravity and all. I had a catch can on the SRT-4 (it was small) and had to empty it about once every week and a half, and that was running less boost than we do stock. I will be getting a FMIC soon and will be putting a CC on prior to the install.

[laloosh]

i've had my ic off a ton of time, never saw a hint of oil anywhere

[jam_asian85]

snapped a quick shot
http://i203.photobucket.com/albums/aa175/jam_asian85/DSC_0007.jpg

just wanna say thanks to Dr. D for helping me out with this set up :D

[mk_slayr]

snapped a quick shot
http://i203.photobucket.com/albums/aa175/jam_asian85/DSC_0007.jpg

just wanna say thanks to Dr. D for helping me out with this set up :D

Install write up = (guitar)

[dadasracecar]

Ummm guys, the pcv valve for the MZR motor is underneath the intake manifold. There is a hose from the crankcase to the passenger side of the intake btw the intake and the crankcase. YOu can't see it from the top with the foam there but you can see it from the bottom of the car if you know what you're looking for. And yes, you absolutely need a catch can. Don't believe me? Pull your throttle body off and take a look inside the intake. I guarantee you it will be coated with oil and gunk. I've pulled intakes to delete the vtcs from four cars and all of them had shit in the intake. Check the 6club forum in the MS6 drivetrain section and look for posts by whoosh. He's got writeups and pix. Also, the setup in the pic above is pointless. You won't get anything there. A lot of MS6 guys did this and got nothing in their cans.

[dadasracecar]

http://forum . mazda 6 club . com/index.php?showtopic=90535

[enganear]

Ok, I'm convinced this is a must do / good thing and it appears a standard pneumatics air/water separator and some tubing are all that is needed. Do you have to remove the intake manifold to get to the PCV valve and the manifold connection?

The cylinder pressures generated by the boost have got to result in substantial blow-by compared to NA engines.
-enganear

[tru-boost]

uuummmmm....... that can is in the wrong spot ! it goes by the pcv valve, not the breather port.

[Dr. D]

uuummmmm....... that can is in the wrong spot ! it goes by the pcv valve, not the breather port.

??? what? your out of your mind... the can could be just about anywhere even though you would want the shortest route possible but regardless there is no problem with the can being there so long as the hoses are in the right spot. which they are.

[driver311]

uuummmmm....... that can is in the wrong spot ! it goes by the pcv valve, not the breather port.

Actually its a good spot but you idealy want two if you are gonna do that.

[Andrade08]

On a forced induction motor you want the oil catch on the PCV valve location first. It doesn't hurt to put an oil catch can on the tube that goes from the valve cover to the intake tube but that is not the main problem spot. You want the main crank case vent to have a seperator. You could just cap that top hose on the intake tube and put a breather on the valve cover in that location the catch can is on if you wanted to.

[SharkDiver]

I took off my inlet tube from my turbo to my intercooler and there was oil all around the inside of the tube.So I guess I got oil coming thru my turbo seals and my pcv system.Why are those catch cans so damn expensive...

[whooosh]

catch can on the intake tube(CAI) in line with the breather(back of valve cover)=there for looks and is doing "nothing"

must remove TB, and intake mani
run in-line with PCV=correct

go ahead and argue all you want.
lol

[winniep]

I will not argue with you one bit as I know this is definitely the correct setup, I was just wondering if you might have a pic or two (how to is even better) because I am not used to pcv valves being where they apparently are on this car. I will definitely be putting one on soon and will be making myself a "ghetto" catch can for about $18. Function over bling.......

[dadasracecar]

Don't bother. The shit in the can has gas in it and it will degrade the plastic your home depot catch can. I know from personal experience. Mine cracked in two days.

[SharkDiver]

catch can on the intake tube(CAI) in line with the breather(back of valve cover)=there for looks and is doing "nothing"

must remove TB, and intake mani
run in-line with PCV=correct

go ahead and argue all you want.
lol

Will the intake mani need a new gasket if it is removed?

[mrlilguy157]

nah. don't even use a gasket. they're overrated.....

:D

in all seriousness. probably. doesn't hurt. under $10

[Dream]

Im a n00b, what is EGR?

[Young Roids]

Im a n00b, what is EGR?

I always thought it was "exhaust gas recirculation"

[laloosh]

Don't bother. The shit in the can has gas in it and it will degrade the plastic your home depot catch can. I know from personal experience. Mine cracked in two days.

if this car is dilluting oil that bad you should really look into the oil i am running. go to bitog.com and search for RLI oil.

[whooosh]

Will the intake mani need a new gasket if it is removed?

I've had my intake off twice
Once to remove VCTS
Once to replace it with my ported one
Used the same gasket each time.
The gasket is metal with a silicone rubbery type black coating

[AutoXRacer]

I've had my TMIC off three times...no oil...completely dry... (knock on wood)

[whooosh]

I've had my TMIC off three times...no oil...completely dry... (knock on wood)

that just means the compressor side of your turbo is OK
pull off your intake manifold(not your intake pipe or CAI)
and see what gifts Mazda has left you.

maybe this
http://i131.photobucket.com/albums/p302/_whooosh_/DSC02300.jpg
and some of this
http://i131.photobucket.com/albums/p302/_whooosh_/DSC02392.jpg

[whooosh]

??? what? your out of your mind... the can could be just about anywhere even though you would want the shortest route possible but regardless there is no problem with the can being there so long as the hoses are in the right spot. which they are.

uh, no they are not in the right spot
actually if you want a catch can for the valve cover vent, this will work but you'll never catch anything in the can. It is there just for looks, no other reason.
The valve cover has a bunch of baffles built into the cover that make oil passing through to the intake tube almost impossible.
Dr. D and whoever else wants to puff up and say otherwise just because theythink this is correct or just hate like hell saying they are wrong...then whatever.
but all bullshit and guessing aside
I've had my intake and valve cover off the car enough times to know what the hell is going on.
catch can goes in-line with your PCV - you must remove your intake manifold to get at it.

[bacarl]

sub'ing for interest's sake...

[Mid_Life_Crisis]

We definitely need a how to on this one. If for no other reason than some of us could use a write-up on how to safely get some of the components that will have to be removed off for inspection purposes even if we don't do the mod. Although for short money it looks like cheap insurance.

[tru-boost]

??? what? your out of your mind... the can could be just about anywhere even though you would want the shortest route possible but regardless there is no problem with the can being there so long as the hoses are in the right spot. which they are.

wrong dude sorry ! if the can is attached to that breather line it will do nothing, unless you have a really bad PCV valve. under Vac. conditions air is pulled INWARD through that breather...so what are you catching ..... CLEAN AIR ?? under boost your PCV valve is CLOSED and air/oil should never make it back to that tube. i have seen tiny traces of it in my CAI, but it is minimal, and 100% not the cause of smoking at idle.

now, with the can in the right spot.....attached between the PCV and the manifold, there is where you will catch the oil. remember under Vac. the air is drawn from the breather, through the crank case,out the PCV and into the manifold. it is very common from that air to pull some oil along with it directly into your intake manifold, causing the wonderfull smoke screen many of us have had issues with.

[bacarl]

We definitely need a how to on this one. If for no other reason than some of us could use a write-up on how to safely get some of the components that will have to be removed off for inspection purposes even if we don't do the mod. Although for short money it looks like cheap insurance.
I'm currently reading thru Whooosh's thread from mazda 6 club (linked on page one, post #13). It contains a ton of info, good pics, good discussion, etc. Also a brief how-to on catch can installation. Definitely recommend checking it out. Thanks whooosh for compiling that info and documenting with pics.

[Young Roids]

I'm currently reading thru Whooosh's thread from mazda 6 club (linked on page one, post #13). It contains a ton of info, good pics, good discussion, etc. Also a brief how-to on catch can installation. Definitely recommend checking it out. Thanks whooosh for compiling that info and documenting with pics.

yes very nice info there

[Dr. D]

well i guess i was mistaken so ya'll can get your panties out of your ass b/c unlike most ppl i can admit when i'm wrong.

[Dr. D]

how about some pics and a HOW TO

[Young Roids]

how about some pics and a HOW TO

check the link to the ms6 site posted earlier in this thread.

[serialtoon]

Ugh, now you guys have me spending money on something else.....

[redspeed]

Ugh, now you guys have me spending money on something else.....

lol, No shit! I'm gona have to do this.

[itzl0l]

i know where the pcv valve is.....where on the intake mani does the other end of the hose connect to?

[dadasracecar]

It's on the bottom, passenger side facing toward the back of the car. YOu can see it from underneath with the diffuser off. It may even be possible to install the can without removing the intake but you're going to need some pretty small hands.

[mazdaspeed32007]

does it matter what kind of catch can you own? Certain manufacturers like greddy and perrin charge like 100 bucks for this but ebay you can get some knock off for like 10 bucks. lol. I usually lean towards more name brands shit for a few reasons but it doesnt seem this matters all that much.
so...??

[bacarl]

Cheaper cans are usually just that: an empty can with two ports (one In, one Out). The vapor travels through the can with some velocity, and if there's nothing to impede its travel, it can blow right thru the can and go right back out the Out port, ending up in the intake mani after all.

The more expensive cans have some type of baffling or screening built into their interiors to trap or "condense" as much of the oil/fluid as possible.

There's a group buy that got started recently on another board for a can by a company called Saikou Michi. Nice piece with some clever baffling solutions for around $80-90. PM me for the GB info/link, as I'm certain I won't be allowed to post details here. (Actually, this board seems a bit more strict than others I have participated in, so if the mere mention of a GB on another board is outlawed, I apologize!)

[Ben Nast]

Whats the worst that can happen from not havig a catch can?
I never got one for my srt4.

[nypest]

Whats the worst that can happen from not havig a catch can?
I never got one for my srt4.

+1?

[Young Roids]

an intercooler filled with oil is the worst that could happen.

[tru-boost]

not to mention the smoke many see at idle.

[nypest]

Alright so for instance i dont have a catch can, car has about 12,000 miles on it I/TMIC/RP/CBE NO SMOKE....How is it some do and some dont ?

Can blowby really only effect some not others ???

[dadasracecar]

THe catch can placed in the intake/crankcase pcv line as described in Whoosh's thread will prevent that shit from flowing through your motor, i.e. cylinders, exhaust mani, and turbo. Probably the biggest gain is prevention of oil knock caused by vaporized oil getting into your cylinder and lowering the octane rating of the fuel. As the line comes in to the intake mani, a catch can installed here does nothing about oil in the intercooler, though in my experience with this car, that is a non-issue.

My main reason for doing it was to prevent oil knock which I believe happens randomly with this car.

[nypest]

THe catch can placed in the intake/crankcase pcv line as described in Whoosh's thread will prevent that shit from flowing through your motor, i.e. cylinders, exhaust mani, and turbo. Probably the biggest gain is prevention of oil knock caused by vaporized oil getting into your cylinder and lowering the octane rating of the fuel. As the line comes in to the intake mani, a catch can installed here does nothing about oil in the intercooler, though in my experience with this car, that is a non-issue.

My main reason for doing it was to prevent oil knock which I believe happens randomly with this car.

great explenation!

But again how is it some may be having this issue and others not. I have no smoke and my TB is clean. Is it directly related to boost??

[SuperStretch18]

http://i131.photobucket.com/albums/p302/_whooosh_/DSC02392.jpg

That's just gross. Guess I'll need to add this to the list...

[whooosh]

great explenation!

But again how is it some may be having this issue and others not. I have no smoke and my TB is clean. Is it directly related to boost??

you can not say others are not having this issue unless you/they remove the
throttle body and or intake manifold and look inside it to see the excessive contamination

[whooosh]

That's just gross. Guess I'll need to add this to the list...

lol
there was actually more than this in the can
I just dumped the remaining on this white step stool to give a good color visual

[nypest]

you can not say others are not having this issue unless you/they remove the
throttle body and or intake manifold and look inside it to see the excessive contamination

Right ok so now what I mean to say is what the catalyst here is it raised boost??? or some deffect?

[Dr. D]

not to mention the smoke many see at idle.

has nothing to do with that'

[nypest]

If blowbye isnt directly related to increasing the boost is it not the a sign of rings&pistons getting worn?
having oil mist mixing with incoming fuel and air degrades the octane rating(as dada said) causing detonation and definate piston ring/piston failure

[redspeed]

If blowbye isnt directly related to increasing the boost is it not the a sign of rings&pistons getting worn?
having oil mist mixing with incoming fuel and air degrades the octane rating(as dada said) causing detonation and definate piston ring/piston failure

The problem is a really sensitive pcv valve. Is supposed to vent oil vapors among other stuff, but we are getting too much.

Here is a good explanation of the pcv valve purpose:

"As an engine runs, gases from the cylinders leak past the piston's sealing rings into the crankcase (containing the crankshaft and other parts). This leaked gas is sometimes referred to as "blow by" because the pressure within the cylinders "blows" them "by" the piston rings. These gases include compounds harmful to an engine, particularly hydrocarbons (unburned fuel), as well as carbon dioxide and water vapor. If allowed to remain in the crankcase, or become too concentrated, the harmful compounds will condense out of the air within the crankcase and form corrosive acids and sludge on the engine's interior surfaces. This can harm the engine as it tends to clog small inner passages, causing overheating, poor lubrication, and high emissions levels. To keep the crankcase air as clean as possible, some sort of ventilation system must be present."

http://en.wikipedia.org/wiki/PCV_valve

[nypest]

The problem is a really sensitive pcv valve. Is supposed to vent oil vapors among other stuff, but we are getting too much.

Here is a good explanation of the pcv valve purpose:

"As an engine runs, gases from the cylinders leak past the piston's sealing rings into the crankcase (containing the crankshaft and other parts). This leaked gas is sometimes referred to as "blow by" because the pressure within the cylinders "blows" them "by" the piston rings. These gases include compounds harmful to an engine, particularly hydrocarbons (unburned fuel), as well as carbon dioxide and water vapor. If allowed to remain in the crankcase, or become too concentrated, the harmful compounds will condense out of the air within the crankcase and form corrosive acids and sludge on the engine's interior surfaces. This can harm the engine as it tends to clog small inner passages, causing overheating, poor lubrication, and high emissions levels. To keep the crankcase air as clean as possible, some sort of ventilation system must be present."

http://en.wikipedia.org/wiki/PCV_valve

Great but still the question remains WHY this excessive "blow-by", faulty/shitty PCV as you say?...Running excessive boost/increasing the pressure in the crankcase?

[winniep]

Don't bother. The shit in the can has gas in it and it will degrade the plastic your home depot catch can. I know from personal experience. Mine cracked in two days.

Surely there isn't THAT much gas mixing with oil? I had 2 on my SRT-4 (talk about blow by) for over 16,000 miles with no issues, other than having to empty it (PCV side) every week and a half or so........Campbell Hausfeild FTW.

[tru-boost]

has nothing to do with that'

yes it does . that is when the PCV valve is open and drawing oil vapors directly into your manifold...idle. there should be very little blow by on hard acceleration. the PCV should be fully closed at that time. if your PCV valv sucks you will get blow by. that is when you see the oil in the CAI and intecooler. mine gets a very lite mist in the CAI but it has never made it through the turbo. my IC is always clean. many cars have the smoke at idle with and without exhaust mods. more often than not a catch can fixes it. look on the subaru forums. TONS of those guys have stopped smoke with a can.

[SharkDiver]

Anyone know anything about this catch can?Im thinking about getting it.
http://cgi.ebay.com/ebaymotors/Oil-Reservoir-Catch-Can-Tank-Civic-CRX-Accord-Si-RED_W0QQitemZ280201398651QQcmdZViewItem?hash=item2 80201398651

[jville]

wouldn't hurt for 30$. I'm interested in seeing some results

[SharkDiver]

The feedback seemed good on that product so I bought it..I hope its not a pos but if it is it only cost me $27.Im guessing if it dont have any leaks it should be just fine.I do wonder what it looks like on the inside.Im hoping that the inlet and outlet lines are not right next to each other on the inside so it dont just suck some of the oil back into the vac. line.

[AutoXRacer]

I bought a generic catch can from ebay before and it didn't work. Previously, I had bought an HKS catch can that did work!!!

I had both cans installed on my previous car along with inline filters and the HKS filter was clean while the generic ebay can was oily and dirty; it was worthless.

[SharkDiver]

I bought a generic catch can from ebay before and it didn't work. Previously, I had bought an HKS catch can that did work!!!

I had both cans installed on my previous car along with inline filters and the HKS filter was clean while the generic ebay can was oily and dirty; it was worthless.

Im not sure but if the HKS was clean and the generic one was dirty woundnt that mean that the generic one was working since it had stuff in it?

[AutoXRacer]

Im not sure but if the HKS was clean and the generic one was dirty woundnt that mean that the generic one was working since it had stuff in it?

No, I had installed an inline filter on the outlet of each can...the outlet of the generic can was always oily and dirty as if it wasn't catching anything. While the HKS one, the filter was clean...the can was catching and filtering.

Both cans had stuff in it...

[SharkDiver]

No, I had installed an inline filter on the outlet of each can...the outlet of the generic can was always oily and dirty as if it wasn't catching anything. While the HKS one, the filter was clean...the can was catching and filtering.

Both cans had stuff in it...

Oh,Ok..I was just going to ask if I should stick a inline filter after the can to catch vapor but I guess I should.Ive read that maybe sticking steal wool in the can helps,Im not sure it thats true.If I have to I can just add a cheap filter after the can and change it a few times a year since it will only cost $2 or so.

[AutoXRacer]

Oh,Ok..I was just going to ask if I should stick a inline filter after the can to catch vapor but I guess I should.Ive read that maybe sticking steal wool in the can helps,Im not sure it thats true.If I have to I can just add a cheap filter after the can and change it a few times a year since it will only cost $2 or so.

Damn, I never thought about that!!! Adding some kind of filter material in the can (the one that didn't work) like steel wool...

[Dream]

There is a group buy going on over at the mazda 6 club forum for a nice baffled catch can for like 85 bucks. It's in the speed6 section in under engine/drivetrain.

[bacarl]

Anyone interested in or confused by blow-by, breather systems, catch cans, etc should read this article! It also explains the difference between the crankcase-to-intake manifold (aka plenum) breather and the cam cover-to-intake (aka CAI) breather. I found it very informative and cleared up lots of confusion.
Disclaimer(1): this document is 19 pgs long and contains math!
Disclaimer(2): I did not locate this article, credit goes to user Shagate from the mazda6 club :)

http://www.106rallye.co.uk/members/dynofiend/breathersystems.pdf

I highly recommend slogging thru it, it's actually pretty well written and concise. I'm currently on pg 12 and have already learned a lot :)

[nypest]

linkey no workie

[tru-boost]

buying on ebay is fine, you can get great deals, but in this case i am willing to bet that can has no baffles in it. the vapor will flow right through it.

[bacarl]

linkey no workiesorry, fixed

[nypest]

good shit so who's doing the HOW-TO??

[jam_asian85]

good shit so who's doing the HOW-TO??

lol, cant be me, i'm waiting on someone to show me how to do mine properly
(gun)

[AutoXRacer]

I'll be looking at it on my next oil change... I have a spare HKS can laying around...I'll write one up if nobody does one before my next oil change...

[tru-boost]

go back to post 13 there is a link. you may have to fill in the missing letters in your browser, but it is right there fellas.

[bacarl]

^^ right on. Not even any missing letters, just extra spaces inserted. Copy, paste, delete spaces, read all about it.

[Averia]

I haven't done it yet but it is possible to access the PCV to intake hose from underneath the car. It's pretty tight but would take less time than removing the whole intake. The hose you need to remove is very short about 4 in. You remove the hose and place two longer hoses (re use the clamps) at the intake and PCV valve bib. The hoses have to reach you catch can installation. Then simply plug the two hoses into the catch can and you are done.

[Andrade08]

I haven't done it yet but it is possible to access the PCV to intake hose from underneath the car. It's pretty tight but would take less time than removing the whole intake. The hose you need to remove is very short about 4 in. You remove the hose and place two longer hoses (re use the clamps) at the intake and PCV valve bib. The hoses have to reach you catch can installation. Then simply plug the two hoses into the catch can and you are done.

Ya....I would either have to do this with out removing the intake or drop it off and have some one do this while I'm at work. I have ZERO time to be pulling my intake off. This car is my daily driver and if it's down, like at the dealer, I need a rental.

[dadasracecar]

I've looked up and you can get to the hose w/o removing the mani but putting a line on the crankcase pcv fitting will be difficult to impossible w/o removing the intake mani.

Removing the mani also allows you to delete the vtcs and clean the gunk out of there. It's not that hard.

Remove the intercooler, remove all associated wiring harnesses, remove the throttle body, remove the serpentine belt, unbolt the powersteering pump, disconnect the two vacuum lines, disconnect the egr, remove the wiring harness and dipstick brackets on the front of the mani, pull the mani bolts, and there you are. If you're local, I'll do it for you for $$$.

[Andrade08]

I've looked up and you can get to the hose w/o removing the mani but putting a line on the crankcase pcv fitting will be difficult to impossible w/o removing the intake mani.

Removing the mani also allows you to delete the vtcs and clean the gunk out of there. It's not that hard.

Remove the intercooler, remove all associated wiring harnesses, remove the throttle body, remove the serpentine belt, unbolt the powersteering pump, disconnect the two vacuum lines, disconnect the egr, remove the wiring harness and dipstick brackets on the front of the mani, pull the mani bolts, and there you are. If you're local, I'll do it for you for $$$.


I can't get those grimmy assed PICs out of my head that Whoosh posted. You know, when I baught this car I told myself I wasn't going to touch it. I have modd'd every car I have ever owned. I have built motors and done auto to stick tranny swaps etc... I've done it all. I have thousands of $$ in tools mechanical and electrical. I couldn't leave it be. One of the first things I thought of when I drove it was the friggin PCV. All the new blown/turbo'd cars have this damn problem. The PCV drinks oil. And the fact that forced induction motors have looser than normal ring gaps doesn't help with idle and off throttle blow by either. Now this is in my head so...........I am going to friggin have to do it. Either pay some one or do it myself. Why did I ever go looking for a Mazdaspeed forum. I couldn't have just drove this thing for 3-4 years and traded it in like I planned right!! Grrrr... (bang)
Oh well..........Why fight it.

[northmiler89]

^ im located in RI as well. We should post this up in the RI thread on the other forum and see if we cant get a bit of a group discount on getting them installed at a shop.

I might just look around and find a buddy to help out... If you are definitally interested, let me know

[ericrapp]

Is there another fix for this to correct the " faulted design" on this ? I realize that cat a catch can will work for a reasonable price. Just wondering if the root of the problem should be resolved. btw awesome info from many thankyou. I changed up intercooler and saw the oil too.

[Andrade08]

^ im located in RI as well. We should post this up in the RI thread on the other forum and see if we cant get a bit of a group discount on getting them installed at a shop.

I might just look around and find a buddy to help out... If you are definitally interested, let me know

Ya I have to get this done. I will probably just tackle it myself. Maybe not. Too bad we couldn't get Tasca to do it as a group thing! Hey, You baught your MS3 there I read. Off of Chanty too? LOL!! Small world. Ever dyno there? Nice friggin dealership.

[Andrade08]

Is there another fix for this to correct the " faulted design" on this ? I realize that cat a catch can will work for a reasonable price. Just wondering if the root of the problem should be resolved. btw awesome info from many thankyou. I changed up intercooler and saw the oil too.

Ah, don't blame Mazda. You have to have a (PCV) Positive Crankcase Evac. system on cars. Unlce sam says so. Most all forced induction vehicles swallow oil through the PCV. Heck. Some N/A motors with high compression blow oil right out the valve cover breather. Baffles. That is the only ticket. Massive amounts of baffling in the valve cover and were ever the heck the PCV is. The only fix here though is a catch can. Or don't run the PCV. But you NEED to vent the crankcase or you will blow oil right into that breather tube on the valve cover.

[mrfixin]

Ah, don't blame Mazda. You have to have a (PCV) Positive Crankcase Evac. system on cars. Unlce sam says so. Most all forced induction vehicles swallow oil through the PCV. Heck. Some N/A motors with high compression blow oil right out the valve cover breather. Baffles. That is the only ticket. Massive amounts of baffling in the valve cover and were ever the heck the PCV is. The only fix here though is a catch can. Or don't run the PCV. But you NEED to vent the crankcase or you will blow oil right into that breather tube on the valve cover.

I have seen guys use a vented oil cap on cars like supercharged mustangs. Do you think this would help us on our MS3's to vent or relieve some pressure? Just curious if you or anyone else knew.

[blacksheepms3]

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[mrfixin]

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[AutoXRacer]

I apologize if I sound like an idiot, but what does subbin' mean????

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[Andrade08]

I have seen guys use a vented oil cap on cars like supercharged mustangs. Do you think this would help us on our MS3's to vent or relieve some pressure? Just curious if you or anyone else knew.

Yes. A vented crankcase with a good breather that is baffled can be used ***ONLY*** if you DO NOT run the PCV. If you do run the PCV then you can not run an open breather. The PCV will suck in unmeter'd air through the open breather and cause a lean idle and lean pops out the exhaust when you lift off the gas. Me personally. I hate PCV systems. I can live with a little gas stink under the hood in exchange for a clean intake system. A nice system would be to block/delete the PCV. The run a 3/4" ID silicone hose from the valve cover breather port to a small baffled catch can that has a breather on the top top. If you do not pull any vacuum on the crankcase (PCV) then you can run an open breather system on a MAF'd car. I've done it with GREAT results in the past. It just stinks a little.

[tru-boost]

oil catch can and a one way check valve.....thats gonna be the TRU-BOOST solution.

[ericrapp]

mrfixin, good question! Andrade08, would I actually need the can if I had; a, lets say stainless steel 1/4" vertical pipe run to a filtered breather. that might allow oil to try to exit under pressure and allow it drain back into motor at idle or resting

[nig3]

??? what? your out of your mind... the can could be just about anywhere even though you would want the shortest route possible but regardless there is no problem with the can being there so long as the hoses are in the right spot. which they are.

No, cause the crank case pressure is beeing suck into the intake maniold under normal driving, that creates a vacum at the top VC PCV you tied into closeing it off completely so its worthles only when you hit boost will it actually draw crankcase pressure threw your set up and back into the manifold. So because when you drive your in vac about 95% of the time your sucking dirty blowby fumes, gas and oil into your intake while your OCC does nothing at all.

this is the way i did mine, its covers all crankcase blowby pressures in vacuum and also in boost and you only need one can still!!

http://i32.tinypic.com/1z65d1x.jpg

[ericrapp]

interesting, are those just ball check valves mounted in opposite directions?