07-31-2022, 05:05 PM | #1 |
Drives: 2020 Camaro SS 1LE Join Date: Apr 2022
Location: Miami
Posts: 227
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Snapped IM Bolt doing LT2 Install
I’m really pissed off. I just snapped the intake manifold bolt using a husky torque wrench set to 30 in-lb. I’m really confused how this is possible considering that the spec is 89in-lb. This is my first time using a torque wrench but I generally know how to use them i set it to the torque spec and twist. I never heard the wrench click and its so below the required spec How does this happen??
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07-31-2022, 05:09 PM | #2 | |
2020 Shadow Gray 2SS
Drives: 2020 2SS - A10, NPP, MRC, CAI Join Date: Dec 2019
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Added after delivery: - GMP CAI, GMP Black Strut Tower Brace, MRR017 1LE Wheels, SS Armrest, Black Fuel Door, Stainless Sport Pedals, SS Wheel Caps, Black Lugs/Locks, GM Splash Guards, DD Smoked LED Markers, Smoked Rear Reflectors, Mishimoto Catch Can, Xpel PPF - Full Front, SunTek 35% Tint, CeramicPro coating, RST Stainless Brake Lines, Castrol SRF, MSD Super Conductor Wires Left: My "fun" ride. Right: My "work" ride: a Gulfstream G600. One's top speed is 180 Mph, the other, 620 Mph... |
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07-31-2022, 05:13 PM | #3 |
Drives: 2020 Camaro SS 1LE Join Date: Apr 2022
Location: Miami
Posts: 227
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1000% I specifically bought a small torque wrench in in-lb. I’m wondering if its a dud because no matter how hard I turn it won’t click to stop the torquing. And 30in-lb is really light shouldnt I be able to turn that grabbing the wrench extension with my hand?
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07-31-2022, 05:17 PM | #4 | |
2020 Shadow Gray 2SS
Drives: 2020 2SS - A10, NPP, MRC, CAI Join Date: Dec 2019
Location: SoCal
Posts: 3,024
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Quote:
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2020 SGM 2SS - A10, NPP, MRC, Red Calipers, Black Camaro Fender Badge, Footwell Lighting
Added after delivery: - GMP CAI, GMP Black Strut Tower Brace, MRR017 1LE Wheels, SS Armrest, Black Fuel Door, Stainless Sport Pedals, SS Wheel Caps, Black Lugs/Locks, GM Splash Guards, DD Smoked LED Markers, Smoked Rear Reflectors, Mishimoto Catch Can, Xpel PPF - Full Front, SunTek 35% Tint, CeramicPro coating, RST Stainless Brake Lines, Castrol SRF, MSD Super Conductor Wires Left: My "fun" ride. Right: My "work" ride: a Gulfstream G600. One's top speed is 180 Mph, the other, 620 Mph... |
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07-31-2022, 05:51 PM | #5 |
Drives: 2020 Camaro SS 1LE Join Date: Apr 2022
Location: Miami
Posts: 227
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This is nuts
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07-31-2022, 06:29 PM | #6 |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,605
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Since we don't know if the wrench is correct and even 89 in-lb isn't a lot of torque, let alone 30, did you feel any difficulty before the bolt snapped? If yes, you were definitely not at 30 in-lb.
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07-31-2022, 06:47 PM | #7 |
2019 ZL1 1LE MY GOON
Drives: 1980 Z28 Big Red. Join Date: Dec 2018
Location: Stoney Creek
Posts: 2,061
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I’m a mechanic. I had the same thing happen with a new torque wrench. I installed my balancer bolt to torque it and felt the threads starting to give. Pulled the bolt out and sure enough the new bolt was wrecked. It happens.
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07-31-2022, 08:18 PM | #8 |
Drives: 2024 Riverside Blue 2SS 1LE Join Date: Mar 2016
Location: Fort Wayne, IN
Posts: 1,208
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Sounds like you had a bad bolt, it happens. I had to get 4 rotor screws out today but life is still good cause I was putting on the track rotors and pads for track day tomorrow.
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07-31-2022, 08:52 PM | #9 |
Drives: 2020 Camaro SS 1LE Join Date: Apr 2022
Location: Miami
Posts: 227
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I know for a fact the torque wrench was set to 30in-lb. It’s a simple husky wrench with the twist handle. Something HAS to be wrong with the wrench I can’t even get it to give at 30in-lb and I work out. I knew in my gut it felt like way too much force but I just bought it yesterday so I decided to trust it and sure enough…
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07-31-2022, 08:57 PM | #10 |
Drives: 2020 Camaro SS 1LE Join Date: Apr 2022
Location: Miami
Posts: 227
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I shaved and wrapped the C8 manifold in a gold heat reflecting material.
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07-31-2022, 10:13 PM | #11 | |
Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011
Location: Trenton, Michigan
Posts: 7,047
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Quote:
I went out and bought a twist-handle style torque wrench, but when I went to torque the bolts, I could tell I was pulling much harder than it should take and the wrench wouldn't click. I finally bought and old style torque beam style torque wrench and it worked like a champ. You could watch the beam on the wrench deflect as you applied torque and watch it approach the 16ft-lbs mark. |
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08-01-2022, 04:50 AM | #12 | |
Drives: 2021 Camaro 2SS 1LE Join Date: Mar 2021
Location: Barrie, Ontario
Posts: 30
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Quote:
Try the wrench on something else that isn't going to break & get a feel for it. |
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08-01-2022, 06:33 AM | #13 |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,178
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First time using a torque wrench and you snapped a bolt. I think others have covered the possibilities.
This thread isn't covered in tears, so I assume it snapped in a way it was easy to back out the broken bolt? |
08-01-2022, 07:02 AM | #14 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,675
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Those cheap torque wrenches barely work at this torque spec
Use the two finger method on a short 1/4 drive ratchet. Once you feel it seat, stop. I’ve tried using the 89in lbs with a torque wrench since the LS days and ran into problems with threads and such, since using my fingers I no longer had issues.
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