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Re: I assume... (archive)

[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]

Posted by Rob Anderson on December 25, 2000 at 17:06:45:

In Reply to: I assume... posted by Bob on December 24, 2000 at 13:05:29:

I agree. No point in main bearings. Change the rod end bearings. I did at 95k along with the oil pump. I did mine for preventative maintainance.

Rob A
M535i SIG Technical Advisor
www.m535i.web.com

You are doing this with the engine still in the car.

If there is a reason you are changing the oil pump (pump failure/extremely low pressure, etc.) then I would at least pull a rod cap to check for damage to the bearing. If not, and you have under 100K on the engine, no need to change the bearings.

Over 100K I WOULD do at least the rod bearings. The mains are tougher to get at to change with the engine still in, and they typically last 250-350K anyway.

If you pulled the head, you might as well deglaze the cylinder walls and renew the rings when you do the rod bearings if you have over 150K on the engine. Usually you have NO ridge on these blocks and the original cross hone marks are still visible, so STD rings work perfectly (mike one cylinder or piston to be sure that it wasn't previously rebored, of course).

Bob

Hey all,

I am going to be installing a new oil pump on a 87 635csi and wanted to know if it is necessary to change the rod and main bearing while i am at it???

Can i just change the pump and leave the original bearings??

thanks






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