Originally posted by Mark:
Yes, I have heard crank flex at speed can do damage to bearings as well, although I would expect to see some broken cranks along with the spun bearings. HAve guys been reporting broken cranks? I would be curious what the majority of the failure modes have been over the years. Has this info been discussed at all?
The stock crank is a very stout forged unit; breaking it is very unlikely.
The bearing has a hard tin core. The hard bearing can not get out of the way (so to speak) of the whipping crank. The higher the rpms the worse the whip!
Majority of engine failures are oil related. Normally loss of oil pressure due to bearing failure. (Which of course crank whip would precipitate)
Yes.
