[Cobra20646]

Pat,
Not just manufacturing errors, but assembly errors. Your checking how the cam lobes are acting against the valves reference crankshaft position in degrees. Your looking ofcourse for what the cam is doing against what the grinder says it should do, but also for any over looked offsets between the cam and crank. You'll also see if your timing marks on your damper are accurate or not too. If you have access to the equipment, it's a good test to perform to to give you some piece of mind before you light it off for the first time. You might also want to double check the piston to valve clearance too.
- Jim -