C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Upper control arm bolt torque spec needed!

Old Aug 21, 2004 | 10:57 PM
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Default Upper control arm bolt torque spec needed!

Was wondering if someone with a factory manual can look something up for me. I installed my Camber-Brace today and need the factory torque specs for the front upper control arm bolts. By the way car is a '94. Any help is appreciated and yes I'm working on getting a factory manual.

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Old Aug 21, 2004 | 11:07 PM
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Assuming you mean the nuts that hold the arm's shaft to the frame-83 lbs. ft. according to my '95 manual.
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Old Aug 21, 2004 | 11:35 PM
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Originally Posted by Corvette Kid NC
Assuming you mean the nuts that hold the arm's shaft to the frame-83 lbs. ft. according to my '95 manual.
Yes, those are the nuts I was referring to. Thanks for the info!
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Old Aug 22, 2004 | 01:39 PM
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My 1992 shop manaul says 37 ftlbs.

Steven
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Old Aug 22, 2004 | 03:46 PM
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That is an interesting range of torque specs. My '84 Helms says 85 N-m and 63 ft lbs. That spec is titled, "Upper Control Arm Shaft to Crossmember". To me, that is too large a bolt, to only have the same torque as the intake manifold (35#).

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Old Aug 22, 2004 | 04:32 PM
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Originally Posted by STEVEN13
My 1992 shop manaul says 37 ftlbs.

Steven
My '96 manual says the same thing.
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Old Aug 22, 2004 | 04:59 PM
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This is crazy.

1984 = 63 ft. lbs.
1992 = 37 ft. lbs.
1995 = 83 ft. lbs.
1996 = 37 ft. lbs.

Can I get a bid for 90? Going once. Going twice. going...

I think I'd just make sure they're "tight" and alert the alignment shop, in case they don't have to add shims, and let them, "do their thing". I went by MY Helms service manual when I rebuilt my front suspension. When I took it in for an alignment, afterward, no caster/camber shims were needed. Just a minor toe in adjustment.

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Old Aug 22, 2004 | 05:10 PM
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Originally Posted by STEVEN13
My 1992 shop manaul says 37 ftlbs.

Steven
You and 96GS are right, when I looked across the page from the description to the spec, I slipped down a spot and gave the number for the lower arm. Sheesh, 37 lbs. ft. does NOT seem like enough for those nuts. I think I'd go some more and recheck them a couple of times too after driving it a bit.
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Old Aug 22, 2004 | 06:56 PM
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Originally Posted by Corvette Kid NC
You and 96GS are right, when I looked across the page from the description to the spec, I slipped down a spot and gave the number for the lower arm. Sheesh, 37 lbs. ft. does NOT seem like enough for those nuts. I think I'd go some more and recheck them a couple of times too after driving it a bit.
Guys I appreciate all the responses. I'm going to do 40 ft/lbs and use blue Loctite on the threads. The only reason that I could see for such a low torque recomendation is that the nuts are made out of what appears to be aluminum. The bolt is definitely thick and strong enough to handle something in the 75-85 ft/lbs range.
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Old Aug 22, 2004 | 08:35 PM
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Mine are at the spec (for the '84) of 63#, + or -. The lowers are spec'ed and torqued to 96 ft lbs.

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