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63chevy 02-06-2011 12:17 PM

bearings went out....
 
i have a chevy 468 /9:1 comp/flat top pistons
and the bearings went out
i didn't run it much do you think it destroyed the cam??
there are not alot of metal shavings in the pan
look at cam had it for 1 year min driving on it.
some wear had roller rockers on it

63chevy 02-06-2011 01:00 PM

i used a mircrom on the cam they all are the same size!!
is they anything else i need to concider

eloc431962 02-06-2011 01:05 PM

Are you talking about the rod or main bearings went out ?

Cole

63chevy 02-06-2011 01:11 PM

the main bearing ,the crank has .1000 lip on it, a machinist can grind
it right?

eloc431962 02-06-2011 01:16 PM

I have went in and did just the bottom end without any problems. You will need to take the crank to a machine shop to make to call on it. Just go ahead and do rod's and mains and a new oil-pump while you are in there thats what i would do if everything checks out ok. JMO Someone else might say different, But i have done this more then once without any issues.
How many miles do you think the engine has on it ?


Cole

63chevy 02-06-2011 01:17 PM

ok thxs for the reply

bigdog7373 02-06-2011 02:25 PM

Also, to add to what cole said, i would replace the cam bearings as well. Excessive clearances in the cam bearings causes low oil pressure and may have contributed to the main bearing failure.

63chevy 02-06-2011 02:34 PM

ya thats would make sence,the lobes on the cam really
arent that bad with measurement

bigdog7373 02-06-2011 02:37 PM

The lobes have nothing to do with the bearings. They are very cheap and not hard to replace. Worth the time and money to prevent another failure.

63chevy 02-06-2011 02:42 PM

ok that true


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