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What torque specs on 7/16 head bolts
Posted: June 20th, 2010, 11:23 pm
by mike0914nascar
I'm about to put a 4.0 head on my 82 258.It has 7/16 head bolts which are torqued to 85 lbs.However the 4.0 head gasket and head are torqued 110 lbs on 1/2 inch bolts.So will there be a head gasket failure torquing at 85 lbs.using the 7/16 head bolts?Thanks!!
Re: What torque specs on 7/16 head bolts
Posted: June 21st, 2010, 6:51 pm
by IH 392
My Victor torque speck book calls for 85ftlbs on the last of the 258's, I wouldn't think the head gasket would fail, you need to torque a 1/2" bolt more to get the same stretch out of it, fasteners have a specific stretch at where they work the best.