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By Jim Rowe - 13 Years Ago
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After having my current 312 balanced i still noticed a drive line vibration. So checked the pinion angle, it was 3 degrees. Had the drive shaft balanced and straightened. Still had a vibration????. i had installed AC and was having problems with getting a belt the right size. I then installed a idler pulley from a 5.8L ford engine. Fit like a glove found a longer belt and working great now. I know sounds off topic, however while watching the idler and belt I observed the balancer weight moving back and forward on the dampener. The ring was actually moving rearward and rubbing on the oil pan. Several years ago I purchased a new harmonic balancer from John Mummert, and now was the time to install.
Viola!! no more vibration. It is so SMOOOOOOOOOOOOOOOOOOOOOTH. Keep and Eye on those old balancer's.
Jim
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