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just bought a 97 c5 57k miles.seems like the crank pulley has a little wobble in it.the belt tensioner shakes slightly.just wanted to know if that was normal?Thanks!
I had a 2001 coupe that had slight crank pulley wobble right from the factory compared to other LS1s. The crank pulley rubber isolator can go bad with time & miles. Guess it depends on how bad your wobble is if it's "normal" or not.
Don't get another factory one. As yours proves, the factory ones fail.
You do have some choices in aftermarket. You can get the stock size or an underdrive one. There are merits to both and a lot of different opinions. Whichever size you get, get a quality one from a respected brand and you will not have to worry about it again.