perry and tony
everything was ok with the specs for rocker arm clearance, push rod length, binding, etc. no problems in this area. i think the problem was that the new valve springs were much stronger than the ones i had before, the lift on the exhaust side was higher and the stock rocker studs couldn't handle the torque. also i wasn't able to get too much of the thread on the studs to screw on the lock nuts. however one of the guys i talked with said that everything would work. yeah, right. the new studs are about 30% stronger and a little bit longer. the stud broke on the exhaust valve. with the combustion in the cylinder and no where for the gases to go it put a lot of pressure in that cylinder. i'm just guessing but i think all of the banging around broke the bottom off of the lifter on the intake side and then it ground off the lobe on the cam. although the engine didn't run very long after this it was enough to spread some fine metal particles everwhere in the engine. haven't taken off the heads yet to see if any damage to pistons, but i did drop the
oil pan and look at one of the main cap bearings. didn't look that bad. i'll know more after i complete the disassemble next week. before i send in the parts to comp cam i will take photos for my records. we'll see if this works out in a professional way.
paul
ps i've used comp cams for about 20 years with no problem in the past.