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LT1-LT4 Modifications
1993-97 Gen II Small Block V8

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Old 07-26-2007, 07:30 PM   #1
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Default LT1 Head bolt tightning sequence and Torque specs.

LT1 Head bolt tightning sequence and Torque specs. Anyone know what it is? I'm getting my heads ported and I want to make sure I don't mess up with the tightning. The new cam also comes in tomorrow.
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Old 07-26-2007, 07:41 PM   #2
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Gah, do a search. billions of threads on this. It's the same as the old school SBCs.
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Old 07-26-2007, 09:33 PM   #3
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Click the image to open in full size.

The torque can vary depending on year or what head bolts you are using.
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Old 07-27-2007, 05:10 PM   #4
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Quote:
Originally Posted by urbanhunter44
Gah, do a search. billions of threads on this. It's the same as the old school SBCs.
Compression and valve clearance vary from motor to motor, so how can head bolt specs be the same?

Does anyone know the torque specs?

Also, I've tried searching and I can't seem to find anything, which is why I was asking for help.

I appreciate it.
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Old 07-27-2007, 08:52 PM   #5
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What head bolts are you using? Stock or ARP? If you are using ARP use the torque the they recommend that will vary depending on what lubricant you use. Stock, for '95 and earlier was 65 ft-lb and the later were a torque + an angle that I don't remember.
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Old 07-27-2007, 09:05 PM   #6
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Did this a couple weeks ago. For stock head bolts, it's 22 ft-lbs and then 67* on the shorter bolts and then 80* on the longer ones. But as it was said, 65 ft-lbs if you don't have an angle gauge. I kinda think they're stupid anyway. Why not just have a torque spec?!
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Old 07-27-2007, 09:35 PM   #7
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And if you are using stock bolts throw out your old ones you have to replace them each time you take them off.
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Old 07-28-2007, 09:32 AM   #8
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Quote:
Originally Posted by speed_demon24
And if you are using stock bolts throw out your old ones you have to replace them each time you take them off.
Yeah I like to live by that rule as well but I have seen guys reuse head bolts before.
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Old 07-28-2007, 01:08 PM   #9
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its like 80 or 90 something i just read about this lastnight maybe this site will help
http://shbox.com/1/4th_gen_tech1.html
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Old 07-31-2007, 09:47 PM   #10
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Thanks guys, I'm putting the motor together tomorrow. I got all new bolts, new plugs and a double roller timing chain. I wanted to go with AC Delco Iridium, but they didn't have any...I had to settle with the NGK Iridiums...I hope they will be ok, I know GM calls for AC Delco...
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Old 07-31-2007, 10:10 PM   #11
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Quote:
Originally Posted by dhdenney
Did this a couple weeks ago. For stock head bolts, it's 22 ft-lbs and then 67* on the shorter bolts and then 80* on the longer ones. But as it was said, 65 ft-lbs if you don't have an angle gauge. I kinda think they're stupid anyway. Why not just have a torque spec?!
The angle method is more accurate than just saying xx fl lbs.
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Old 08-01-2007, 10:15 AM   #12
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Quote:
Originally Posted by speed_demon24
The angle method is more accurate than just saying xx fl lbs.
Yeah but I mean when you reach the end angle spec, haven't you just torqued it higher? There would be an equivalent torque spec!
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Old 08-01-2007, 10:47 AM   #13
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reuse old head bolts that are Torque to yeild! YIKES *sorry if I misspelled anything, really tired right now*
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Old 08-01-2007, 10:47 AM
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