head bolt torque
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
head bolt torque
what is it for my 113 alu heads
the manual says
smal bolts 88NM
large bolts 101NM
right?
And must I tight the bolts in several runs, starting with littel torque and then climb?
thanks
ohh and how much sealent on the bolts, is the threads enough?
regards
the manual says
smal bolts 88NM
large bolts 101NM
right?
And must I tight the bolts in several runs, starting with littel torque and then climb?
thanks
ohh and how much sealent on the bolts, is the threads enough?
regards
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: head bolt torque (devilfish)
My '88 GM Shop Manual says to:
-apply GM sealent #1052080 or equivalent to the head bolt threads
-install all head bolts finger tight
-torque in several steps to 60-75lb-ft torque in the specified order:
<-Front
.....13......5.......2.....10
......O......O......O......O
17......9......1.......6.....14
.O......O......O......O......O
16.12..8..4..3..7..11..15
.O..O..O..O..O..O..O..O
For my '88 the diagram shows two different lengths of head bolts but has only one torque spec for either bolt.
The torque numbers for #113 heads in my '88 L98 may not apply to your '90 since since your pistons develope more compression but the tightening sequence should be good.
-apply GM sealent #1052080 or equivalent to the head bolt threads
-install all head bolts finger tight
-torque in several steps to 60-75lb-ft torque in the specified order:
<-Front
.....13......5.......2.....10
......O......O......O......O
17......9......1.......6.....14
.O......O......O......O......O
16.12..8..4..3..7..11..15
.O..O..O..O..O..O..O..O
For my '88 the diagram shows two different lengths of head bolts but has only one torque spec for either bolt.
The torque numbers for #113 heads in my '88 L98 may not apply to your '90 since since your pistons develope more compression but the tightening sequence should be good.
Team Owner
Joined: Mar 2000
Posts: 83,381
Likes: 87
From: Boston, MA
Re: (devilfish)
im using stock bolts. Should I thigh them all to 100NM or should I follw the haynes manual?
1986-88: Long & Medium bolts, 65 Ft. Lbs.; Short bolts, 60 Ft. Lbs.
And how much sealent did u use on the bolts?
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