Thread: Engine Question
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Old 08-09-2010, 07:41 AM   #9
Dave in MN
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Join Date: May 2010
Location: Jordan, MN
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Default Re: Engine Question

The fact that it tightens up after being freed is what has me confused, what would cause that?[/QUOTE]

Good question....I'd like to know the answer also.
I see this happen with most babbitt rebuilds and more often when using an assembly grease like Lubriplate 105 (white assembly lube). The amount of force to break the crank loose after being static for awhile requires quite a bit of leverage. After breaking it loose, it takes a fraction of the break-loose force to keep it moving. I don't consider this condition unusual but normal based on what I have encountered over the years. From my experience the condition is lessened considerably when using a liquid assembly lube like Clevite 77 (heavy/sticky oil).

Anybody have a good technical answer to the question? Thanks!
Good Day!
Dave in MN
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