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Old 03-18-2009, 09:20 AM
Creative Engineering Creative Engineering is offline
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,668
Default Re: Assembly defects, with pics & other stuff

Excessive vibration:

The photo below shows a crankshaft with the weights removed. The bolt hole pattern for mounting these weights are 120 degrees apart. The cut-outs for balancing should, of course, be postioned at the rod big-end. One of the weights on this crank had been fastened, "clocked", 120 degrees out. I'm certain that this is why some engines vibrate so much more than others.

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File Type: jpg crank.jpg (205.2 KB, 188 views)
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