Difference in LS6 headbolts
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
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From: Homer Glen IL
Difference in LS6 headbolts
I have an LS6 engine from an uknown donor. I am replacing the head gaskets. It has 10 long bolts in the valve spring area, 5 bolts about 1" shorter on the exhaust manifold side, and 5 short (3") on the intake side.
Which bolts do I buy? 98-03 or 04?
Which bolts do I buy? 98-03 or 04?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You need ALL new head bolts! There ALL ONE TIME USE (TORQUE TO YEILD) BOLTS!! The torque for the small bolts is DIFFERENT than the large bolts. USE THE DETAILED TORQUE PROCEDURE in the service manual!WARNING!!!!!!!!!!!!!!!!!!! MAKE ABSOLUTY POSITIVELY SURE that there is NO, NADA, NONE, coolant or moisture inside the head bolt holes!!!!!
They are BLIND HOLES and if theres liquid in the holes, you will rupture the block when you torque in the bolts!!!!!!
INSPECT, very carefully!
I use ARP head studs! ABSOLUTY outstanding and completly reuseable!
Pro
Joined: Mar 2004
Posts: 653
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Every LS1/LS6 I've seen only has 5 head bolts under the valve cover, 5 near the exhaust manifold, and 5 on the intake side. Yours somehow has 10 under the valve cover. Congrats!
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
You need ALL new head bolts! There ALL ONE TIME USE (TORQUE TO YEILD) BOLTS!! The torque for the small bolts is DIFFERENT than the large bolts. USE THE DETAILED TORQUE PROCEDURE in the service manual!WARNING!!!!!!!!!!!!!!!!!!! MAKE ABSOLUTY POSITIVELY SURE that there is NO, NADA, NONE, coolant or moisture inside the head bolt holes!!!!!
They are BLIND HOLES and if theres liquid in the holes, you will rupture the block when you torque in the bolts!!!!!!
INSPECT, very carefully!
I use ARP head studs! ABSOLUTY outstanding and completly reuseable!
