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

Intake Headache

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Old Sep 9, 2006 | 06:02 PM
  #1  
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Default Intake Headache

Attempt #2 on resealing the intake, attempt #1 failed as I thought that the SS allen head bolts I was using were stripping out. Turns out what was wrong was the head itself was stripped out.....This car had been resealed once prior to my purchase but was leaking out of the back, so I decided to reseal it. The threads pulled out when I went to 35 ftlbs

I retapped the #6 to 7/16.......and it has held.

Question is, I am now torqued out of sequence.......

Do I take it apart and redo or will this hold? I went back through at the end at 35 ftlbs insequence....and then hit 1&4 at 45 ftlbs

Lgaff
1990 L98
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Old Sep 10, 2006 | 04:19 PM
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After the repair, re-torquing the bolt out of sequence would not cause a problem. What's worse is re-torquing the other two bolts to 45 ft. lbs.
which would cause the manifold to seat unevenly.

Retorque the 1 & 4 bolts back to 35 ft. lbs. and everything will be fine.

Last edited by GKK; Sep 10, 2006 at 04:22 PM.
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Old Sep 10, 2006 | 05:00 PM
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Manual calls for 1&4 to be torqued to 45 ftlbs on a 1990
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Old Sep 10, 2006 | 11:42 PM
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Is that the Helms manual because, I don't remember torquing those two bolts to 45 ft. lbs. on my "91".

Anyways, I wouldn't take everything apart now.
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