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Old 01-31-2017, 03:34 PM   #1
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Join Date: May 2010
Location: Moncks Corner, SC
Posts: 398
Default Insert bearings

The last 2 Model A engines that I had inserted the rear main bearing failed due to lack of lubrication. The bearing spun cutting the oil flow. The insert shell actually welded onto the crank journal. A big mess. Has this happened to you? The first engine the bearing failed at 1000 miles and the second engine the bearing failed after 10 minutes of running in the garage. I believe inserts are not designed with a gravity flow oil system. Why is it the center main and forward main not effected? Now the first engine has been repaired with new inserts and this engine is running fine for the past 2 thousand miles. The second engine is being repaired, so I will have to wait the outcome.

Last edited by oldredford; 02-02-2017 at 05:09 AM.
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