Posted by peter r on August 6, 2009, 2:14 am, in reply to "Engine Crank bearings Failure"
144.139.163.35

Sorry Pat , thought i was finished then it dawned to look at a book . The book is ... ACL Engine Manual No 413 Published by Gregory`s Automotive Publications ISBN 0 85566 680 3 1997 reprint It`s similar or carries on from the Repco Engine Service Manual of the 1970s , it`s all to do with engines hows and whys builds fails measurements etc . It has a bit on thrust faces and gives pics ( not real clear ) Failure ......... When fitting crank and damaging thrust surface . Says wear on 1 face is the norm as if from insufficient lubrication Excessive thrust placed on thrust bearing for a LONG PERIOD of TIME ( no time frame given )such as bad clutch adjust or auto with heavy or constant thrust can cause oil flow cut off and the flange becomes wiped and heated , usually resulting in total failure . { Heated i guess you can work out . Wiping or smearing is caused by metal to metal contact described as metal being displaced (wiped ) and redeposited .} Crankshaft Thrust Face machined with a rough finish can wear into thrust lining causing failure . Suggests if both surfaces have worn , insufficient end play and/or heavy thrust loading of the front gears/pulleys/belts . The book has a section on engine bearings 42 pages and give descriptions and pics of bearing failure and cause etc If you have a Library near and are able to get this or a similar book you could diagnose , cause/effect , your big and main bearings , there are to many actual pics and tech drawings to relay . The thrust may have failed but the others may tell more of the story . Now i`m finished and i`ll leave you to it . Cheers