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Bearing pitting cause?
#1761835
02/24/15 02:11 AM
02/24/15 02:11 AM
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Joined: Jun 2004
Posts: 767
NW PA
V10nacuda
OP
super stock
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OP
super stock
Joined: Jun 2004
Posts: 767
NW PA
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Pulled my pump gas 451 out and decided to evaluate it to see what it needed.All cylinders leak down to 2 percent or 3% except for one... turned out to be 5%. mains looked so so..pulled the rod bearings and found this on both sides of the rod bearing. any ideas what caused it?
My buddy didnt think it was detonation Looking for ideas.
Last edited by V10nacuda; 02/24/15 02:13 AM.
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Re: Bearing pitting cause?
[Re: V10nacuda]
#1761836
02/24/15 03:19 AM
02/24/15 03:19 AM
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Joined: Jan 2003
Posts: 1,995
s. e. pa.
calrobb2000
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,995
s. e. pa.
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hi
looks like condensation that did not get burned off due to not running engine long enough to boil out moisture .
condensation left in the oil creates acid that eats the metal .
Last edited by calrobb2000; 02/24/15 03:22 AM.
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the shineness may have been the bad bearing materials being washed out and balling up or scrubbing the bearings on the way out 
Condensation as a big problem with most interanl combustion motors that don't get use very often and sit a long time bewteen using them, IE airplanes, boats, motorhomes and motorcylces 
I try to make sure when I know a toy is going to sit a long time that I take it out and drive it long enough for the oil to get hot and circulate the oil real good when hot and then park it, no starting it up in between using it the next time for a long drive again 
