Do you think the difference in the torque between the 110 lbs on the head studs and the 90 lbs on the lump bolts could be a problem?
110 vs. 90 is way too excessive of a difference between the bolts to torque, plus its too much torque to begin with. Your probably pulling the deck around the bolt holes away from the rest of the deck surface on the ones your torquing to 110. Use a file to lightly run across the top of the bolt holes and see if it shines the deck around the bolt holes before it does the rest of the deck between the cylinders. How did you come to that torque to begin with, stock is only 95 ft.lbs. Also, if your mixing studs and bolts together thats not good either, they each pull the block completely differently when they are torqued, you either need to use all studs or all bolts, and the correct torque should be used for either one to work properly. I think your starting to unravel where/why your problem is occurring/recurring.
