Question about Cars & Trucks
Exhaust valve busting same one on 3 rebuilds. 3 different cams. 2 different heads same block
Posted by Anonymous on
Checked the connecting rod length and piston wrist-pin location on that cylinder? Before locking the head down put a pancake of modeling clay on the piston and rotate the crankshaft with a wrench to check actual valve clearance. On street engines I do this without the head gasket to add some "insurance". Compare what you see at #3 to one that has not damaged a valve. Also make sure your valve spring isn't going into "bind"...If it is it may be the wrong one (very unusual but I've seen ones get mixed up from different engines) How's the rod bearing on that rod? if it's worn out it can be "throwing" the piston at the valve.
Do what I said and you have to find something!
Posted on May 14, 2010
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Posted on Jan 02, 2017
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