LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

LT1 head torque spec's

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Old Jan 23, 2004 | 04:36 PM
  #1  
Kain's Avatar
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LT1 head torque spec's

I was looking in my Haynes manual and it says 65 ft-pounds to torque them down to (of course in the pattern).

I was just double checking if that was right? I'll make one pass to snug them down, then another pass to torque them down.
Old Jan 23, 2004 | 05:25 PM
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You should do three passes,25lbs,45lbs,65lbs.
Old Jan 23, 2004 | 07:01 PM
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2nd that. Three passes.
Old Jan 23, 2004 | 08:26 PM
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My haynes manual says 95 and earlier is 65 ft-lbs, and 96-97 is the three step process. I thought lt1 had the same block & heads from 93 to 97
Chad
Old Jan 24, 2004 | 08:06 AM
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I would recommend doing in a three step no matter what just to ensure an even seal and torqing all the way around
Old Jan 24, 2004 | 08:47 AM
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Originally posted by polcat1p
My haynes manual says 95 and earlier is 65 ft-lbs, and 96-97 is the three step process. I thought lt1 had the same block & heads from 93 to 97
Chad
The factory manual says 96-97 first pass 22 lb. ft., then short bolts 67º, medium and long bolts 80º. This is the method I think I will use when putting mine back together. The torque angle method is supposed to be more accurate than torque alone (and I think why the later manuals spec'd it). Of course, you will need a torque angle meter.
Old Jan 24, 2004 | 08:48 AM
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Originally posted by polcat1p
My haynes manual says 95 and earlier is 65 ft-lbs, and 96-97 is the three step process. I thought lt1 had the same block & heads from 93 to 97
Chad
would that be because the '96-'97 used torque to yield bolts?
i'd assume Haynes is speaking of using GM bolts

EDIT: Shoebox, could you explain the angle method or shoot me alink where i could read about it?

Last edited by simple; Jan 24, 2004 at 08:51 AM.
Old Jan 24, 2004 | 01:56 PM
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Originally posted by simple
would that be because the '96-'97 used torque to yield bolts?
i'd assume Haynes is speaking of using GM bolts

EDIT: Shoebox, could you explain the angle method or shoot me alink where i could read about it?
The 'angle method' refers to going say the 67 degrees[of an arc/circle] past the 22 ft lbs point...etc..
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