Is the 3800 a rebuildable engine? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
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Old 07-01-2007, 07:56 AM   #21
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Originally Posted by crzydmnd72
Of course, freshening up, includes cam bearings, correct?

Is there any benefit or reason to worry about the mains not being straight? This would be another major thing I would want a machinist to check. If the motor was running ok when taken down, maybe just burning some oil or low pressure, is this even an issue?
Cam bearings can be done at any time. You don't need to take the motor completely apart to do it. However, if you have any block work done, then the cam bearings will be replaced as a matter of course. (They will have to come out to clean the block after the machine work is done.)

As small and stiff as the cast iron block is, I wouldn't worry about line boring the block. If it is out of line far enough, scrap it and get another one. (Cost..line boring isn't a cheap option on the 3800 and it will require oversize main bearings)

Fixing the crank if damaged is along the same could have the crank welded up and turned down to correct a damaged journal. But it would be cheaper to get another crank.
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