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Re: What causes

To: <spridgets@autox.team.net>
Subject: Re: What causes
From: "Engfehr, John (J.D.)" <jengfehr@ford.com>
Date: Mon, 10 Jul 2006 10:15:54 -0400
>>Exactly Mr. Bill...vicious cycle.....
......low oil pressure (below mfg's spec.) 'causes premature wear which
in turn, leads to even lower oil pressure, etc.,

I'll throw my 2 cents in on this one. It is unusual to wipe mains before
rod bearings due to lack of oil. Main bearings don't take the same load
from combustion as a rod bearing, which is constantly getting changing
loads (combustion then inertia). All main bearings wiped would indicate
a miss match between crank journal size and bearing sizing. This would
also generate the heat you were describing. I don't see this as low oil
pressure, I see wrong crank bearing clearances leading to high internal
friction and resulting bearing failure.

John Engfehr
'59 Bugeye 1275




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