8BA Head Bolt Torque Cast Iron Heads

4

49r

Senior Member
My 'F Series Trucks' manual states 65-70 1bs for stock cast iron heads but I've searched previous posts and the maximum recommeded seems to be around 60 1bs. Did Ford originally get it wrong, or should we just be more conservative these days? Am I likely to blow a gasket by only going to 60 1bs, or more likely to do so by pulling the deck up by using a higher torque setting?
 
55 to 60 is for aftermarket aluminum heads, done in 3 steps of about 20# increments.

My stock iron heads are done to 70 as Henry said.
 
I think you need modify the torque values, based on the type of fasteners used. Bolts need more torque because of the coarser threads, studs need less ( fine threads on the nuts). The Ford specs reflect these changes (Higher with the 8BA because of the use of bolts)... comments?
 
Did my 50 F-1 with cast iron heads to 70 lbs in 3 steps, still ok after 3 years and no problems.
 
It is truly amazing the way a Flathead engine can absorb mis-guided mechanical prodding and keep on ticking. I think it was O'Ron who says no system or procedure is wrong except the one that does not work.
 
You must log in or register to reply here.
Back
Top