BAD2000TA

iTrader: (6)

Just an FYI to all those out there that have removed the rear caliper bracket for any reason (new rotors, etc). These 15MM bolts require 74 ft/lbs!! Ask me how I know if you don't put the correct torque on that bolt!! Having your caliper grind against the inside of your rim will make you remember every time!!

Also, the bolt has been discontinued from GM (bastards!! It's my "new" car!!). Anyways, walking the local boneyard I found that a 2011ish Volvo XC70 AWD Crosscountry wagon uses the same size bolt on their front caliper bracket! It was 1mm longer and worked perfectly. Go figure!!

Chris Paveglio

iTrader: (2)

I think you can get comparable bolts from Fastenal or McMaster.

I also did not torque enough and did not use loctite so my front caliper came unfastened and drug around in the wheel well. Horrible scraping in the wheel, but was able to stop. Thankfully wife was at home and not far away and brought me the bolt that had obviously gone MIA.

30thanniv

iTrader: (2)

Autozone and all the chains have the bolt on the rack.

02TransAm/Batmobile

iTrader: (32)

Glad to know I'm not the only guy that had a caliper come off and scrape the inner barrel of their rim.

johngrn

I have the GM shop manual and it says to tighten the front and rear caliper brackets to 160 ft /lb, getting conflicting difference someone is say 100 ft, maybe the firebird with out the ws6 package?? / Found the GM shop here on ls1 , on page section 5-85 say that the bolts are to tighten to 160ft front and back

file:///C:/Users/John/Links/1998-Svc...rked%20(1).pdf

Also this is the reason the some people have had there caliper bracket bolts come loose not because you did not use loct tight it happen to me also and substantial damage to rim and caliper so use 160ft to tighten up front and rear brake to caliper BOLTS, the GM book dose not say to apply loc tight to these bolts

BAD2000TA

iTrader: (6)

You are incorrect; the torque requirement for the caliper bracket is 74 ft/lbs. I’ve checked it several times.

johngrn

where are you getting your information, also if you check auto zone s they say 137ft, also had the guy check at O'Reilly Auto Parts and the said 160 ft on trans am

JimMueller

iTrader: (9)

From my 1998 F-body service manual; there is a typo in the English column where they mention N*m instead of lb-ft. It does not distinguish between Chevy/Pontiac/V6/V8. You can find electronic versions of the factory service manuals linked in this thread:

https://ls1tech.com/forums/pcm-diagn...98-2002-a.html

BAD2000TA

iTrader: (6)

From the Service Manual. 100 N*m (74 lb.ft)

Kcutty85

iTrader: (3)

��dum♂️ I've done it as well with the front lol! Definitely scary .

sjsingle1

iTrader: (1)

I replaced the bolts with ARPs.....front and back.....higher tq....jus sayin......

quiet_storm98

iTrader: (48)

I believe this is the same that the repair manual I have said as well. I know I sure didn't torque them to 160lb/ft and its been a few years since I swapped my rotors and I haven't had any issues.

johngrn

here the POOF that the bolts use 160 ft sec in a GM shop manual / I am very sure you have the wrong information here is the proof this is a gm shop manual look on 5-85


file:///C:/Users/John/Links/1998-Svc...rked%20(1).pdf

johngrn

I have put the correct information on how tight the bolts on the brake caliper bracket to uses 160ft this in formation comes from the GM manual on 5-85

file:///C:/Users/John/Links/1998-Svc...rked%20(1).pdf


have a good day

johngrn

I have put the correct information on how tight the bolts on the brake caliper bracket to uses 160ft this in formation comes from the GM manual on 5-85

file:///C:/Users/John/Links/1998-Svc...rked%20(1).pdf

badtenant

My 2000 service manual:

3. Install the caliper bracket with the bracket bolts.
Tighten
Tighten the caliper bolts to 100 N·m (74 lb ft).
4. Install the inner and outer brake pads. Refer to Brake Pads Replacement (Rear).

T/A Addict

Is there a good alternate part number for the front brackets since 18023646 is discontinued? I had one back out causing it to grind the wheel and bend the bracket. I ordered a new bracket and bolts from Ace just to get it off the road and home but want legit grade bolt made for it.

QwkTrip

iTrader: (23)

Damn this thread is messed up! LOL!

Bolt torque is generally based on thread diameter except where special considerations are made. Standard torque for metric Class 10.9 bolts is,

M10 thread --> 55 Nm (40 lb-ft)
M12 thread --> 100 Nm (74 lb-ft)
M14 thread --> 160 Nm (118 lb-ft)
M16 thread --> 240 Nm (177 lb-ft)

I've never seen LS1 rear brakes, but I know that the LT1 rear brakes use a M12 bolt to hold caliper to axle bracket. Either way, look at the thread size and if the published torque spec is not close to the numbers above then it probably doesn't pass the laugh test.