Brake Hardware Question

[CincyCats08]

I have a 1999 Grand Prix GTP and am looking for a part number or a place to order new bolts for my front caliper brackets. The old bolts are rusted and the heads are beginning to round off. I'm not sure how much more abuse they'll take. If anyone could help it would be appreciated.

Thanks,

- Justin -

[Airjer_]

The caliper bracket to knuckle bolts are available from the dealer. The caliper slides, that bolt the caliper to the bracket, are available from any parts store. You can get a front caliper hardware kit that will have the new rubber boots, slide pins, and shims or you can get just the slide pins/bolts.

[CincyCats08]

Thanks for the help! After searching and searching I figured the bracket bolts were dealer only. I'll have to make a trip up there tomorrow. Would you by chance have a torque number for those bolts? My Haynes manual has been MIA since I moved.

[BNaylor]

The two caliper bracket bolts were GM part #18023539 and will come with threadlocker pre-applied. This is the old number but will cross reference to the new.


Here are the torque specs for front and rear:

FRONT BRAKES:
Bleeder Valve
13 N?m 115 lb in
Brake Hose Bolt
54 N?m 40 lb ft
Caliper Bolts
85 N?m 63 lb ft
Caliper Bracket Bolts
185 N?m 137 lb ft


REAR BRAKES:
Bleeder Valve
11 N?m 97 lb in
Brake Hose Bolt
44 N?m 32 lb ft
Caliper Bolts
43 N?m 32 lb ft
Caliper Bracket Bolts
125 N?m 92 lb ft
Rotor/J 37160-A Nut
34 N?m 25 lb ft

[CincyCats08]

Thanks for the part number, I called the dealership today and was told there were none showing in stock and the part is on back order. Does anyone have an extra set of bolts or have a way to get any? I was told there was no telling when they could actually get them into the dealer.

[richtazz]

the newest part number for those bolts are as follows:

97-early 99, 11519132 (replaces 18023539 Bob gave you) w/spacer (14mm x 2 thread, 48.5mm long)

late 99-01, 88965594 w/o spacer (14mm x 2 thread, 41mm long)

It doesn't say, but I believe they are a 10.8 hardness rating, so you can use the specs above to see if a hardware or nut and bolt place may have replacements (since the factory bolts are on back order). Don't forget to apply threadlocker so they won't back out on you.

[CincyCats08]

I'll have to call around and see if anyone has bolt that would fit. I got a used set coming from ed morad that I would hope are in better condition than mine. Those will make due until I can get some new replacements.

Thanks again for all your help guys!

- Justin -