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Message: [QUOTE="elrodalexander73, post: 1241921, member: 16217"] I would be looking very carefully at the surface where the main meets the block on the sides of the mains, as the block flexes the material is comprised all but very little and over enough time the caps move in a kind of a criss cross movement. I remember when Cummins upped the H.P on N14s and had this problem, we used to use green Loctite, NO CHIT and Loctite the main bearing caps into the block and use blue on the bolts with ample amounts of oil to torque them properly, this was an ACTUAL service bulletin from Cummins engineering dept.. This prevented some possibility of walk and worked on several engines with less than severe fretting. I prefer plasti gauging in several different places on the crank as well to see how absolutely perfect the journal on the crank it self is, how many miles was on the block before you machined it and what type of life did it exhibit is another factor.. I remember N14s in Over the road trucks were hardly ever worn badly when rods and mains went in, but on the Michigan specials we Loctite'd every cap carefully due the operational load impeded on the engines. [/QUOTE]

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