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Re: why do you need to flush the engine? (archive)
[ Follow Ups ] [ E30 M3 Message Board ] [ Msg. Board FAQ ]
Posted by C///MR on January 27, 2002 at 17:55:54:

In Reply to: Re: why do you need to flush the engine? posted by eric_m3 on January 27, 2002 at 07:49:41:

I did mine right after I bought it. I wanted to switch to Mobil1 so I wanted to flush out all the old deposits and such. I didn't really know what the PO had used oil wise and such. I can't see doing it that often maybe every 50,000 mile or so.
Chris

If you r engine is not showing signs of oil related deposits, then why do this?

are you thinking preventative maintenance? PUll valve cover off and see if any depositing is taking place first.

If you flush a dirty engine you can open up a whole bunch of leaks you didn't know you had! Oil consumption can go way up if there are deposits at the piston rings, valve seals, rear main seal etc. which will be removed and gaps become larger.

BTW transmission fluid is great to use if you add a quart and run engine for 1/2 hour @ 3,000 rpm and below.

Eric




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