Engine out of balance??!! HELP!

[eXploitedGST]

Ok so ive torn up to stock crank pulleys in about the past 5 months... i talked to a local perforamnce shop and they said that the engine is most likely outta balance and if i put on a solid underdrive pulley its gonna F up on me.... do you guys think this is true? or its just the fact the the first pulley was stock one with 150,000 miles on it and second was off my other talon with 135,000 miles and are just old. I will put on a solid pulley if i should be fine so then this crap doesnt happen. he said if i put it on there with it out of balance itll wreck my engine. any ideas?

 

[leet]

If your damper pulleys had that many miles on them, they are the problem. They can be expected to fail around 100k miles.

I don't recommend undampened pulleys for an engine that isn't fully balanced. If you absolutely MUST have an underdrive pulley. Buschur makes a nice one

Your engine is fine.