cam swap done... BIG PROBLEMS
TECH Enthusiast
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Joined: May 2006
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From: IN A VAN, DOWN BY THE RIVER!
^ cam hitting the valves? are we forgetting about the lifters, pushrods and rockers?
Staging Lane
Joined: Jul 2005
Posts: 96
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From: Stanwood, Wa.
great point.
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Or if you don't keep your headlight fluid reservoir filled that could short some of the wires on the distributor packs. Haha what a dunce. Good thing my car came stock with pushrods, rockers and lifters ahahaha
Thread Starter
On The Tree
Joined: Dec 2008
Posts: 125
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From: Pittsburgh
alright. when i got the old cam out i did not know to line them up. Ls1howto left that out. The cam retainer plate IS on it. When i reassemled I had it lined up dot to dot. I just got it torn back down And it is about 2 or 3 teeth off. Its backfiring really bad out of the intake and the exhaust. Something else i just noticed now is that if you turn the motor by hand, at certain points it gets pretty damn hard to turn. So i see i kinda have a few arguments going on in the thread. Anybody wanna give me some agreeable ideas on where to go from here?
FML
FML
Replace bent valves. J/K. hopefully. get a C5R chain. Goes on better-less slack. And if your valves did kiss the pistons. Well clean up the sharp edges-will about eliminate stress risers, and of course replace bad parts. Just preparing you for worst case scenario.
Bad idea. You'll have to pull the crank sprocket, add spacers behind the oil pump, just a big hassle.
Get an LS2 chain and be done with that part.
You probably bent valves spinning it w/ the timing off. Whip out your compression gauge and check each cylinder, find the ones making little or no compression, and hope they're all on the same head.
Welcome to the School of Hard Knocks. Some prefer reading a service manual, for reasons you'll encounter shortly.
Get an LS2 chain and be done with that part.
You probably bent valves spinning it w/ the timing off. Whip out your compression gauge and check each cylinder, find the ones making little or no compression, and hope they're all on the same head.
Welcome to the School of Hard Knocks. Some prefer reading a service manual, for reasons you'll encounter shortly.
Were you eyeballing it, or did you use a steel straight-edge and physically verify from the centerline of the crank and cam?
Either your chain allowed it to jump 2 or 3 teeth, or it wasn't aligned when you installed it...see above.
Do not go with a double roller...short of a compression check, I'd start ordering all the gaskets you need for a head swap, as well as lining up a machine shop to replace your valves and make sure your valve guides are ok. You probably also need new pushrods now, and lifters might not be a bad idea either (I wouldn't want to run them after having them bind as much as smashing a valve into a piston would do).
Buy a Factory Service Manual before you re-assemble ANYTHING.
STOP turning the motor over, get yourself a new chain, loosen all the rockers (so the vales are closed, dont wanna bend anything that isnt). tdc the engine, line it up CORRECTLY, re install the chain. turn the engine over by hand, see how it feels. should spin freely. if it does, proceed to do a do a compression check on all 8.
