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

degree my head bolts ?????

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Old Oct 9, 2009 | 08:47 PM
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Default degree my head bolts ?????

so i picked up heads this afternoon, my machinest asked if i had the torque specs, told him im sure it was in my manual, so he opened up his lil book of specs and turned it around and said here copy this.
It turns out that this book says(step1) torque all bolts to 22#'s.(step2) short bolts turn 67 deg.(step3) med and long bolts turn to 80 deg.Okay again im ol school back in my days i torqued the heads to round 65 #'s ,how am i suppose to torque these to degrees??is there a special tool?
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Old Oct 9, 2009 | 10:41 PM
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This is what you're looking for...

http://buy1.snapon.com/catalog/item....re&dir=catalog
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Old Oct 9, 2009 | 10:48 PM
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No special tool required. A lot of "German" car makers don't use foot# torque specs. Instead they turn bolts a number of degrees.... 360 degrees being 1 "full" turn of the bolt or wrench....180 degrees = 1/2 of a "full" turn...and so on....he listed 22 #s as the starting point for all the bolts. Their torque process is accurate especially if using a low torque to yeild (teflon) thread sealant....and torque wrenches work off of friction.

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Old Oct 9, 2009 | 10:50 PM
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Originally Posted by ol school
[B].Okay again im ol school back in my days i torqued the heads to round 65 #'s
Never had a problem using the old method with a torque gauge
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Old Oct 9, 2009 | 10:50 PM
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Originally Posted by Mark85Vett
so i guess theres no torque specs..? has no one figured out what the degree is equal to torque..? sure liked it when it was just torque
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Old Oct 9, 2009 | 10:58 PM
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Originally Posted by rodj
Never had a problem using the old method with a torque gauge
myself included, i just need someone who has converted degrees to torque....life would be so much easier...
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Old Oct 9, 2009 | 11:02 PM
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Who makes the head bolts you picked up? Did your new head bolts come with thread "sealant" on them?

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Old Oct 9, 2009 | 11:54 PM
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I don't remember where I got my information, but I torqued all my new ARP head bolts to 264 and then 780 inch pounds (22 and 65 ftlbs). It hasn't blown up yet...
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Old Oct 10, 2009 | 12:38 AM
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Originally Posted by engle1147
Who makes the head bolts you picked up? Did your new head bolts come with thread "sealant" on them?

You put on your own thread sealant.
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Old Oct 10, 2009 | 01:03 AM
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if you bought regular head bolts or arp bolts you can just torque it to 65ftlbs.
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Old Oct 10, 2009 | 04:47 AM
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Originally Posted by ol school
so i guess theres no torque specs..? has no one figured out what the degree is equal to torque..? sure liked it when it was just torque
I dont believe there can be a conversion due to friction. Just switch out to the older style bolts or ARP bolts and torque using the earlier LT1 specs.
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Old Oct 10, 2009 | 05:55 AM
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If your using factory Torque to yeild bolts you need to use the degree method. If they are standard bolts or ARP type you can just torque normally.
Also you can not reuse the factory TTY bolts but can reuse the ARPs.
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Old Oct 10, 2009 | 08:11 AM
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Originally Posted by RichS
If your using factory Torque to yeild bolts you need to use the degree method. If they are standard bolts or ARP type you can just torque normally.
Also you can not reuse the factory TTY bolts but can reuse the ARPs.


I am old school myself. I use old style bolts with some sealer and a good torque wrench. Never been a problem.
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Old Oct 10, 2009 | 09:57 AM
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Like many other members above, I torqued mine to 65 ft-lbs. ARP bolts come with torque instructions.
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Old Oct 10, 2009 | 11:46 AM
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Originally Posted by engle1147
Who makes the head bolts you picked up? Did your new head bolts come with thread "sealant" on them?

HeadBolts are made by Felpro.. i know there not the ARP's
havent opened the box dont knoow if it came with sealant?i'll chk
Thanks

yes theres a coating on the threads (of something)
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Old Oct 11, 2009 | 01:27 AM
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For ARPs, it's important to read the info sheet that comes in the box. There are differences in the torque spec depending on what lube/sealant you use on the threads.

There's also some WARNING information on the sheet. Information like how to install the washers, how to lube them, etc.

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Old Oct 11, 2009 | 08:15 AM
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Does anyone know the year that torque to yield bolts were introduced in the c4? I was under the impression that all Gen 1 and Gen 2 engines used "normal" bolts, and the TTY did not start till 1997 when the LS1 engines came out.
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To degree my head bolts ?????

Old Oct 11, 2009 | 08:29 AM
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There was another thread on when they changed to TTY bolts, IIRC it was 95.
When I did my heads I replaced the stock bolts with ARP. I'm glad I did all my stock ones were stretched too much to reuse.
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Old Oct 11, 2009 | 09:16 AM
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Originally Posted by Pete K
Does anyone know the year that torque to yield bolts were introduced in the c4? I was under the impression that all Gen 1 and Gen 2 engines used "normal" bolts, and the TTY did not start till 1997 when the LS1 engines came out.


I belive is was with the 96. When I did heads on my 95 the FSM had normal torque values.(as far as I can remember 10 years ago)
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Old Oct 11, 2009 | 10:53 AM
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all 96 lt1 and lt4 engines have tty bolts
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