Torque question plz..
08-23-2009, 06:21 PM
#1
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Torque question plz.. I'm putting a 96 heads on a 94 block, looked to remember the cyliner heads torque specs in the haynes book on the shelf and was a little confused.
Shouldn't all LT1 Cylinder heads be torqued to 65 ft-lbs ?!! In the haynes it says this :
1995 and earlier : 65 ft-lbs.
1996 through 1997 :
Step 1, all - 22.
Step 2, short bolts - Turn an additional 67 degrees.
Step 2, Medium and long bolts - Turn an additional 80 degrees.
There's a huge difference between 65 and 22 !! Can any one explain to me why 93-95 torque numbers are different? In my case I'm installing 96 heads on a 94 block, so what do I do? Why torques are different in the first place!(Just trying to understand).
Thanks a lot guys.
Shouldn't all LT1 Cylinder heads be torqued to 65 ft-lbs ?!! In the haynes it says this :
1995 and earlier : 65 ft-lbs.
1996 through 1997 :
Step 1, all - 22.
Step 2, short bolts - Turn an additional 67 degrees.
Step 2, Medium and long bolts - Turn an additional 80 degrees.
There's a huge difference between 65 and 22 !! Can any one explain to me why 93-95 torque numbers are different? In my case I'm installing 96 heads on a 94 block, so what do I do? Why torques are different in the first place!(Just trying to understand).
Thanks a lot guys.
Last edited by MySuperSportCamaro; 08-23-2009 at 06:38 PM.
08-23-2009, 06:56 PM
#2
That depends on the type of bolts you are using. Those procedures are for OEM-style TTY bolts (which can NOT be reused).
If you are using conventional bolts, torque them in sequence in three passes:
1st - 23 ft. lbs.
2nd - 45 ft. lbs.
3rd - 70 ft. lbs.
If you are using conventional bolts, torque them in sequence in three passes:
1st - 23 ft. lbs.
2nd - 45 ft. lbs.
3rd - 70 ft. lbs.
08-23-2009, 07:03 PM
#3
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Thanks for the info, so I shouldn't reuse the bolts from the 96 engine? What is conventional bolts?
I'll buy new bolts if I have to, if that's the case should I follow the numbers you gave me above?
Thanks again.
I'll buy new bolts if I have to, if that's the case should I follow the numbers you gave me above?
Thanks again.
08-23-2009, 07:21 PM
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We had a good discussion about this on LT1LS1.com
http://www.ls1lt1.com/forum/showthre...t=29336&page=2
Post #20 is where it begins, quite in-depth stuff.
http://www.ls1lt1.com/forum/showthre...t=29336&page=2
Post #20 is where it begins, quite in-depth stuff.
08-23-2009, 07:59 PM
#9
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The later year LT1s spec does show using the torque/angle method for tightening, but the bolts are not TTY. Still, buy some ARP bolts is what I would recommend.
