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Re: No vacuum in crankcase (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Rajinder on December 11, 2001 at 02:01:24:

In Reply to: Re: No vacuum in crankcase posted by Kevin on December 10, 2001 at 16:51:52:

I tested my 1988 750 PCV and they can be blown through both ways. On other cars it is normally only one way. can some one guide us.


Not sure I understand your description, but the valve should pass pressure from the crankcase to the intakes.

Kevin


Hi. Had a problem with a poorly running -89 750. I pulled the sparkplugs and saw the worst case of carbon ever. The plugs was changed by former owner a half year ago. ( Maybe why he sold it ...)? I´ve also noticed that it consumes lots of oil. After reading the archives in this forum I suspected the pcv valves. Right ? Now some strange stuff. The engine runs quite fine now, taking of the oilfillercap does nothing. No change in rpm, no vacuum, no blowing. Nothing. Testing the pcv´s makes me wonder if I´m thinking right: If I try to blow in the end of the valve that fits in the large rubberhose between airflowmeter and valve the pcv blocks, if I suck it lets air through. Isn´t this the wrong direction or is it me ? Both pcv´s work the same way.
Any advise ?





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