Cm870

[mikkhh]

How many miles engine had before rebuild?

https://rawze.com/forums/showthread.php?pid=78312

https://rawze.com/forums/showthread.php?...2#pid78212
Info about what it takes to properly rebuild those red engines.

Was cylinder head brand new OEM? Liners set to spec like mentioned here? Was the harmonic balancer replaced already? If not then engine is destined to fail sooner than later. If rod bearings were not done at 500 000 - 800 000 miles did somebody replace the rods due to rod bushing wear (almost nobody manages to properly replace rod bushings and hone them to spec nowadays, new rods may not be that expensive after all too compared to good machine shop and ).

ALSO very important!!! No regrinding of crankshafts (especially after bearing failure) on those motors since they have rolled radius fillets on crank journals and that fillet is really important for longevity + 99% of people who regrind crankshafts do not get them centered well enough to make them last. Reground cranks will either snap at webs OR develop cracks at journals, either way you are screwed.