09-25-2022, 12:42 PM | #1 |
Drives: 2011 Camaro LS Join Date: Sep 2022
Location: Pulaski, NY
Posts: 31
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OEM Front Caliper bolt size? 18 or 22?
I replaced a wheel hub today on my 2011 V6 and purchased new AC Delco front caliper bolts since I had to take the caliper off. When I popped open the new bolts they were 22mm and a bit shorter. The OEM ones I took out were the expected 18mm. Did Rockauto send me the wrong part?
The part I bought is ACDELCO 18K17018. Listed as Front on their website. Last edited by steaksauce28; 09-25-2022 at 01:08 PM. |
09-25-2022, 01:09 PM | #2 |
Drives: LT W/2LT,blue metallic Join Date: Jul 2016
Location: central florida
Posts: 4,938
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good question.i have heard rumors of people reusing those bolts but not sure its a great idea.
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09-26-2022, 06:34 AM | #3 |
Drives: 13 CAMARO 2SS LS3-04 SILVERADO LS3 Join Date: Dec 2021
Location: SOUTHERN MARYLAND
Posts: 802
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09-26-2022, 07:20 AM | #4 |
Drives: 2012 Camaro SS Join Date: Dec 2019
Location: New York
Posts: 1,434
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I worked in a dealership for 11 years and we always reused the bolts and never had a problem. Only bolts I would ever replace where the head bolts. Everything else pretty much gets used again.
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2012 Camaro 2SS/RS - CSP Custom Cam 232/240 .615/.615 113 +3, Texas speed CNC heads, FTI billet triple disc converter, K&N cai, Katech ported TB, GPI Ported/rod modded manifold, Texas speed 1 7/8 headers, HFC, Flowmaster 2 chambers with x pipe, Mishimoto CC, MSD wires, Roto fab washer relocation, tru cool 40k trans cooler, apex scoop, Pedders extreme coil overs and much more!!
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09-26-2022, 08:42 AM | #5 |
Drives: '12 Camaro 2SS/RS Vert Join Date: Oct 2020
Location: Virginia
Posts: 197
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I will be the one to say don't reuse the old bolts. I did and one of the front caliper bolts backed out and all four were not completely tight. I ordered a set of reusable ones from screaming chicken.
As for the size, the ones on the SS are 18mm. Hope that helps.
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2012 Camaro SS Convertible: 2SS, LS3, M6, Triple Black. Mods: LSA S/C, FIC 1000 injectors, ZL1 fuel pump, Solo Axleback, 1LE FE6 rear swaybar, CAGS delete, Vararam CAI, Heritage grill, Hotchkis springs, '15 FE4 struts/shocks, ZL1 side rockers, Velgen Classic5 wheels, Pedders radius rod bushings, ARH LTHs, gutted HFCs,...
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09-26-2022, 09:25 AM | #6 | |
Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017
Location: Huntsville, AL
Posts: 2,283
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Quote:
I reuse the bolts also, but usually hit them with some blue Loctite. |
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09-26-2022, 09:59 AM | #7 |
Drives: 13 CAMARO 2SS LS3-04 SILVERADO LS3 Join Date: Dec 2021
Location: SOUTHERN MARYLAND
Posts: 802
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GM is out of control with these torque to yield fasteners! The spec on that caliper bracket is 30 ft/lbs + 90 degrees. Like I said, I never replace these bolts and I do a bizillion brake jobs. Doing my wifes Cruze right now....re using the bolts.
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09-26-2022, 03:45 PM | #8 | |
Drives: 2011 Camaro LS Join Date: Sep 2022
Location: Pulaski, NY
Posts: 31
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Quote:
Got it! I think what’s odd to me is that if the GM replacement bolt was 22mm (the size of the lug nuts) someone would’ve mentioned it by now. I just really feel like they sent me the wrong part in the right box. They did seem to thread just fine though…. |
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09-26-2022, 04:35 PM | #9 |
Drives: LT W/2LT,blue metallic Join Date: Jul 2016
Location: central florida
Posts: 4,938
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good to know,blue loctite is a good idea,right? might do my fronts this winter
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09-26-2022, 05:01 PM | #10 |
Drives: 2011 Inferno Orange Camaro 2SS/RS Join Date: Nov 2011
Location: Pittsburgh, PA
Posts: 1,368
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09-27-2022, 07:41 AM | #11 |
Drives: 2014 Camaro 1LT Join Date: Aug 2019
Location: Central Florida
Posts: 372
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I believe I had this exact same issue when I replaced my brakes, but it was on the rear (don't quote me). Rockauto caliper bolts were different sizes than my original bolts. I just reused the original.
I'm also glad to hear that a lot of you guys have reused the old bolts w/o issues. The way the documentation on repairs is stated, the bolts are torque spec'd and will snap like a pretzel if I try to reuse them. |
09-27-2022, 11:45 AM | #12 | |
Drives: 2013 1SS Join Date: Dec 2012
Location: New Jersey
Posts: 724
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Quote:
I wouldn't go shorter because you'd risk having less thread engagement. I'm looking at an old caliper bolt right now and judging by the wear marks it looks like the last 25 mm of thread is what was engaged with the caliper. *I should add that I think the knuckles are the same across all trim levels, so the hardware used to mount things to the knuckles should be also be the same. Last edited by kevint; 09-27-2022 at 11:56 AM. |
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09-27-2022, 01:25 PM | #13 | |
Drives: 13 CAMARO 2SS LS3-04 SILVERADO LS3 Join Date: Dec 2021
Location: SOUTHERN MARYLAND
Posts: 802
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Quote:
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09-27-2022, 02:22 PM | #14 |
Drives: 2013 1SS Join Date: Dec 2012
Location: New Jersey
Posts: 724
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