Thread: timing chain troubles

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cam, lifters, timing chain and gears are all comp cams. cam is solid non-roller

Originally Posted by 1965ss496

cam, lifters, timing chain and gears are all comp cams. cam is solid non-roller

i had many sets looking at them side by side all are the same markers just stick it in there box and put there name on it .less it a steel machine gear set like rollmasters the iron gears like comp manley edel crane cloyes iron sets are all from the same maker or two thats about it .comp can sell bad stuff it happens but i think you have some alinement deal the china cranks and the old gm 454 blocks from the mild 70 had thick blocks but there machine work was less then good

my block is a 1980 gm 4 bolt truck block. it does not appear to have been lined bored to date. the cam does not walk too much, and to be sure, we put a button on it even though you are not supposed to need to with a solid lifter cam. my crank is a scat. i am not sure if it is from japan or china or what ? hope not. the gears appear to run straight, but the old gears have strange wear patterns since the explosion. i don't know if they were wearing funny, or maybe they were cut / machined that way , or maybe the junk chain caused them to wear funny? i only got 9 eighth mile passes on the complete rebuild, and i was shifting @ 6200. when the chain failed this time. the car usually goes through the traps in the quarter at @ 73, or 7400 . i just got a good set from cloyes, and not only does the chain look to be of a much better quality, but the gears appear to be machined correctly. i just hate to put it back together with the new chain if i am missing something. thanks for the help, and any other ideas you might have !