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08-21-2021, 10:16 PM
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#1 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
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Micro Welding of bearing shell to rod housing bore
Any ideas ?
Could it be when the combustion occurs the bearings take a hit in the middle causing the outer parts of the shell to move away from the housing just slightly and then return causing a fretting action and transfer of metal, from shell to housing bore. |
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08-22-2021, 03:37 AM
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#2 |
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Junior Member
Join Date: Jul 2018
Posts: 3
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Re: Micro Welding of bearing shell to rod housing bore
Rods out of round or inadequate bearing crush. I'm just spit balling ideas.
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08-22-2021, 08:16 AM
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#3 |
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VIP Member
Join Date: Dec 2001
Location: Texarkana Ark/TX
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Re: Micro Welding of bearing shell to rod housing bore
Bearing type/part number and rod type and application?
General answer: Fit in housing bore Pictures?
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Adger Smith (Former SS) |
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08-22-2021, 09:18 AM
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#4 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
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Re: Micro Welding of bearing shell to rod housing bore
Manley rods, King not as bad as Clevite 77, housing bore round according to AG 300. No pictures all the evidence is gone, removed.
How is bearing crush measured and where can the specifications be found? Oil is semi synthetic |
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08-22-2021, 09:32 AM
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#5 |
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Member
Join Date: Aug 2010
Location: CT
Posts: 458
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Re: Micro Welding of bearing shell to rod housing bore
I don't know if it's correct or not, but I use a height gauge to measure each shell and to verify that the shells are square, which I've found some that are way off. I've had rods on the small end of spec as well as the big side both do it.
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Phil Molski PMR Performance S/C 1623 |
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08-22-2021, 11:20 AM
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#6 |
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VIP Member
Join Date: Jun 2006
Posts: 3,420
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Re: Micro Welding of bearing shell to rod housing bore
using too thin of an oil ?---oil is not "thick" enough and not enough "pressure on the bearing" to keep the proper spacing between bearing and crank
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08-22-2021, 12:33 PM
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#7 | |
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Senior Member
Join Date: Apr 2020
Location: Phila, PA
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Re: Micro Welding of bearing shell to rod housing bore
Quote:
Larry, Are you saying the Micro Welding is happening near the ends of the bearing? Stan |
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