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Ok, what we have done so far is pull the clutch, pull the flywheel and the drive shaft. The flywheel, my friends, has a 2x4 piece of 1/4 inch steel welded to it. Without clutch and flywheel the engine showed bad imbalance. The whole assembly was then rebalanced properly. By the way the harmonic balancer also had a weight on it.... When putting the engine back together we also found that the piston and rods had been in the engine the wrong way around... If we hadnt had the vibration issue we would not have found this. Right now the engine runs silky smooth while idling. No vibration. The vibration between 2000 and 2500 rpm is there regardless of engine temperature. First name is Erwin, by the way. And the engine only has 500 miles on it, by the way... I guess the first owner couldnt get it to run, seeing the car was built in 2008....
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