MSP in need of help

[mymp5]

So a while ago my friend blew his spicy MSP we went put a used motor in the car and found out that it was in worse shape than the orginal so i had him take it all to a machine shop so have the head, crank, and block redone. he got it all back and they told him that the head was ok and they didn't touch it. we had to put everything back together. i know that everything in the motor got together right but when we went to start it, it had a loud knock. i used a screwdriver as a stethoscope. the top and the bottom of the motor sounded the same but when i put it next to where the motor and tranny meet it sounded like a tractor trailer running down the highway. so my question is: is there any way i could of put the clutch disc in backwards and its hitting something casueing the knock

[xelderx]

Sounds more like piston slap to me. I'm hoping you used new rod and crank bearings when you put it together.

[mymp5]

of course but the noise doesn't sound like its coming from there its the loudest where the block meets the tranny

[mymp5]

is there any way that the clutch disc can be in backwards my dad that is a mechanic says it could i just want to double check

[xelderx]

is there any way that the clutch disc can be in backwards my dad that is a mechanic says it could i just want to double check

Usually not. The clutch isn't symetrical and putting it in backwards would cause the springs to hit the flywheel. It would have never sat flat against the friction surface on the flywheel. That would have made it stick out too far for the the pressure plate to mate up to the flywheel. Even if you did manage to mount it backwards you would know right away because it wouldn't work properly.

[Fudgie]

Noise go away when clutch is depressed?

[mymp5]

Noise go away when clutch is depressed?

no but when you have the front tire in the air the tires want to jurk and its not right

and if it were a piston slap you would hear it on the bottom of the oil pan not where the engine and the tranny meet thats where i think it has something to do with the clutch

[mymp5]

Noise go away when clutch is depressed?

no but when you have the front tire in the air the wheels jurk and make noise its not right

and if it were a piston slap you would hear it on the bottom of the oil pan not where the engine and the tranny meet thats where i think it has something to do with the clutch

[xelderx]

and if it were a piston slap you would hear it on the bottom of the oil pan not where the engine and the tranny meet thats where i think it has something to do with the clutch

Rod knock sounds like it's low in the motor. Piston slap is higher and if it's #4 piston then it is very close to the tranny bellhousing.

[Fudgie]

Just to make sure- you have both crankshaft thrust bearings in. I have seen engines where the thrust bearing gets spit out, and the crank is walking back and forth allowing the flywheel to actually contact the block. When the car is on the ground, how is your 1st and reverse gear engagement?

[mymp5]

Just to make sure- you have both crankshaft thrust bearings in. I have seen engines where the thrust bearing gets spit out, and the crank is walking back and forth allowing the flywheel to actually contact the block. When the car is on the ground, how is your 1st and reverse gear engagement?

to afraid to even think about driving it so i guess i will take off the oil pan and the upper oil thing ya i just had a brain fart and see if can see any thing anyother things i might look for

[Fudgie]

Its tough trying to diag this type of stuff over the net. You can also pull the plug wire off of #4 while it is running (being carefull). Sometimes, a rod knock/wristpin noise will go away without combustion. May help you pin -point the noise a little better.

[xelderx]

Also you can't remove the bearing support plate (aluminum piece above the oil pan) with the tranny still bolted to the motor. There are two 10mm head bolts between the block and the flywheel.

[mymp5]

Its tough trying to diag this type of stuff over the net. You can also pull the plug wire off of #4 while it is running (being carefull). Sometimes, a rod knock/wristpin noise will go away without combustion. May help you pin -point the noise a little better.

ya did all that still made the noise nothing changed i did that with all the plugs that was on of the first things that i did

[mymp5]

Also you can't remove the bearing support plate (aluminum piece above the oil pan) with the tranny still bolted to the motor. There are two 10mm head bolts between the block and the flywheel.

we are going to take the tranny out to see if it has anthing to do with the clutch so i will take off the bearing support plate after we come to the conclusion that it is not the clutch

[mymp5]

so a little update when we started to take out the tranny bolts found out that someone didn't tighten them so we still took it out we are still doing the new clutch and shit will keep you all informed