Discard Mounting Bolts? (caliper mounting)
Thread Starter
Racer
Joined: Dec 2000
Posts: 279
Likes: 7
From: L.A., CA.
Discard Mounting Bolts? (caliper mounting)
While rotating my front disks (because my former mechanic put the right on the left, etc, don't ask) I noticed that the service manual says:
"---remove two bracket mounting bolts and washers - Discard mounting bolts"
and further on it says: "-New bracket mounting bolts will come with an adhesive already applied to the threads",
and further " tighten to 225 N.m (166 lb.ft.)"
So I used the old bolts with red locktite.
Are the bolts over torqued and dead, or is this just because GM wants to sell more bolts, or they don't believe in locktite and use something special?
My guess is that they coat all of the bolts with a precoat type locktite at the factory to speed installation on the assembly line, and just recommend that same bolt as a replacement because they can.
Any opinions?
"---remove two bracket mounting bolts and washers - Discard mounting bolts"
and further on it says: "-New bracket mounting bolts will come with an adhesive already applied to the threads",
and further " tighten to 225 N.m (166 lb.ft.)"
So I used the old bolts with red locktite.
Are the bolts over torqued and dead, or is this just because GM wants to sell more bolts, or they don't believe in locktite and use something special?
My guess is that they coat all of the bolts with a precoat type locktite at the factory to speed installation on the assembly line, and just recommend that same bolt as a replacement because they can.
Any opinions?
Elite Torch Red Member
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
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Re: Discard Mounting Bolts? (Zpeedstr)
I reused mine.
Racer
Joined: Aug 2002
Posts: 386
Likes: 0
From: Lancaster Lancashire
Re: Discard Mounting Bolts? (Zpeedstr)
I reused mine as well, I had one that had beem rounded off by some previous nurd and fitted a 10.6 grade metric cap head screw, (much easier to undo). I used blue loctite. Will you be able to remove them OK with red loctite?.
Burning Brakes
Joined: Jan 2003
Posts: 755
Likes: 32
From: Roswell Georgia
Re: Discard Mounting Bolts? (Davemc1963-87conv)
I used blue loctite. Will you be able to remove them OK with red loctite?.
(I've found that the blue loctite is sufficient for holding these bolts in all driving conditions from auto-x to track days.) :yesnod:
Race Director
Joined: May 2000
Posts: 17,101
Likes: 4
From: No more yankee my wankee, the Donger is tired!
Re: Discard Mounting Bolts? (mr.beachcomber)
To release the red loctite, use a heat source on the bolt until the loctite burns off and stops smoking. Then wait for the bolt and the surrounding area to cool before removing the bolt.
(I've found that the blue loctite is sufficient for holding these bolts in all driving conditions from auto-x to track days.) :yesnod:
(I've found that the blue loctite is sufficient for holding these bolts in all driving conditions from auto-x to track days.) :yesnod:
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Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 10
From: Montrose Colorado
Re: Discard Mounting Bolts? (JasonL)
GM engineers will always error on the side of caution. Unless your doing some heavy duty track racing you should be all right, but then again new ones aren't that expensive. 84 CF 91 ZR-1
Burning Brakes
Joined: Feb 2002
Posts: 871
Likes: 1
From: Union KY
Re: Discard Mounting Bolts? (Zpeedstr)
Like the others here, I reused mine as well. As an aside, those bolts are about 2X the thickness of whatever else you're steering around as a daily driver.
Full blown raod track braking aside, I can't imagine them ever failing. The only consideration I'd give here conserns the fact that normal street sedan caliper bolts pass through "rubber" bushings. The C4 bolet is metal to metal. that might cause additional shock loading. Maybe that's what the general had in mind re: replacing them.
Cire96
Full blown raod track braking aside, I can't imagine them ever failing. The only consideration I'd give here conserns the fact that normal street sedan caliper bolts pass through "rubber" bushings. The C4 bolet is metal to metal. that might cause additional shock loading. Maybe that's what the general had in mind re: replacing them.
Cire96
