Question about head bolt torque
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Joined: Sep 2005
Posts: 402
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From: Yorktown, VA
Car: 1989 IROC-Z
Engine: L98
Transmission: 700R4
Axle/Gears: 4th gen rear with 3.42
Question about head bolt torque
I got Trick Flow's head bolt kit. The instructions that came with the bolts say to torque the bolts to 80 ft/lbs if you are using 30W oil to lube them. Does that seem excessive to anyone else? The heads are AFR 180's and I don't want to ruin them.
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Joined: Apr 2008
Posts: 360
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From: Minnesnowta
Car: 1987 Camaro Z28
Engine: 355ci, XE262 , 650dp
Transmission: T-5, RAM clutch
Axle/Gears: 3.23 limited slip
Re: Question about head bolt torque
If that's what it calls for, no. I believe for cast iron heads, Haynes calls for 60 ft-lbs. Thats what I've done in the past, but I wouldn't wonder from spec.
Just make sure you torque them in sequence, in about 20 ft-lbs. Increments.
Just make sure you torque them in sequence, in about 20 ft-lbs. Increments.
Thread Starter
Member
Joined: Sep 2005
Posts: 402
Likes: 10
From: Yorktown, VA
Car: 1989 IROC-Z
Engine: L98
Transmission: 700R4
Axle/Gears: 4th gen rear with 3.42
Re: Question about head bolt torque
Yeah I torqued them first to 40 (per the sheet from trick flow) then to 60 and then to 80.
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