'67 BIG BLOCK HEAD BOLT TORQUE

[Rob A.]

The chassis service manual and two other engine rebuild manuals I have call for 80ft lbs on all the cylinder head bolts on big blocks. I have another book that calls for 65 for the short bolts, and 75 for the long, which I believe is correct for only aluminum heads. Can someone confirm the proper torque and whether it is different for the short and long bolts?

[John H.]

Re: '67 BIG BLOCK HEAD BOLT TORQUE

Rob -

The Chassis Overhaul Manual torque specs show 80 ft-lbs. for all bolts on iron heads; the aluminum heads show 75 for the long bolts and 65 for the short bolts.

[Clem Z.]

Re: '67 BIG BLOCK HEAD BOLT TORQUE

that is only true if you are using GM head bolts as other bolt manufactures may have different specs.