What size bolt?

[Mookhaasa]

I need a new bolt for my front caliper, does anyone know the pitch and bolt size? Pretty sure it has a 17mm head.

Mine fell out.

I see torque specs but no real size info for a replacement.

 

[justin1194]

Take a bolt to Ace or some hardware store.

 

[Mookhaasa]

I guess I will have too.

 

[915_P5]

An auto zone should be abel to help u out

 

[justin1194]

You will pay alot more if you go to autozone, i work there lol. better off taking a bolt to ace, or a hardware store for cheaper.

 

[Mookhaasa]

Why you should thread lock the Bracket to knuckle bolts.

 

[justin1194]

Why you should thread lock the Bracket to knuckle bolts.

ouch, take a wire brush on a drill to that rust. it'll come right off

 

[esnave09]

This just happened to me last night! What'd you find out for the threads and such? I'm going to Ace to get some, but both of my bolts disappeared!! And I don't feel like taking off the other one right now, even though I probably will anyways to make sure they're tight.....

Also, is it the same for the front and rears?

 

[Mookhaasa]

I just had a bucket of old suspension bolts and randoms other bolts and one fit, it had a lock washer and I blue thread locked it.

So you are going to have to take one off the other side.

But please try to remember the pitch and size. and use grade 8 or better. the length is like 1 1/4 or 1 1/2"

 

[esnave09]

Ah. I just pulled a bolt off the other side today, planning on goin in tonight to get some.

 

[Mookhaasa]

Bolt just fell off again. WTF!? So later today I should have the exact bolt sizes thread pitch and length. Also this tells me blue locktite not enough, Red it is this time.

 

[rit14623]

I know it's extra work, but you could take the opposite wheel off, remove the same bolt and bring that to a hardware/auto parts store.

 

[kamesama980]

1. clean threads. both of the bolt and the hole (wire wheel and/or thread chaser AND degreaser)
2. TORQUE WRENCH.

only anti-sieze or threadlock if the factory repair manual calls for it. much more likely to threadlock than anti-sieze.
I've done hundreds of brake jobs and never had one complaint or come back related to fastener failure. Few other guys in the shop did because they didn't clean and torque.

 

[Mookhaasa]

So It got replaced with a 7/16 -20 bolt was like an 1.5" I almost felt like I need to file down the last 1/8th" or so. Its not touching the rotor so I felt okay rolling with it. Also I used locktite\RED\Permanant. If it falls out again, I will weld that bish still and throw away the whole knuckle when I need a new rotor.

 

[rit14623]

So It got replaced with a 7/16 -20 bolt was like an 1.5" I almost felt like I need to file down the last 1/8th" or so. Its not touching the rotor so I felt okay rolling with it. Also I used locktite\RED\Permanant. If it falls out again, I will weld that bish still and throw away the whole knuckle when I need a new rotor.

You didn't get a metric bolt???

 

[lowlevel]

... This may be a dumb question, by why the heck wouldn't you just go to the dealer and pay the $3ea for the OEM bolts?

 

[hornsfan10609]

$3 is a lot for one bolt and not everyone lives near a dealer. Hell I worked at a dealer and still would buy hardware elsewhere.

 

[Mookhaasa]

Grade 8 bolt that fits is a bolt that works for me. Also the mazda dealers around here have literally nothing in stock ever. So ordering one from them isn't a short process.

I'd be better off in a junkyard, but that also is inconvenient, because it means they have to have a protege on hand.

 

[Mookhaasa]

You didn't get a metric bolt???

The m12 1.5 was loose. The standard fit perfect. Unless its suppose to be m12 1.25 but the bolt I had that worked was standard.