When I tq down studs and bolts. 100 is used on the studs and 90 on the lump bolts. The ARP studs specify 110 and I feel this is too high for our thin blocks. For a 250, the front DS head bolt/ stud only gets 85-90 by me.
The short lump bolt does not grow much compared to a full length bolt. Tq any higher and the short bolt may snap because of no room to stretch when head thermally expands.
Sounds like something else is wrong for the gasket to blow in the same spot in the same way. Fuel mixture and distribution come to mind.
I have yet to blow a gasket (1025), with pressures higher than yours. Maybe I am not trying hard enough.
Are there any signs of detonation in the suspect cylinders?
Last edited by tlowe #1716; 08/28/12 05:14 PM.
