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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 01-03-2013, 09:57 AM
nitrydr1600 nitrydr1600 is offline
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Location: michigan
 
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Mein Auto: 1997 z3, 1982 corvette
z3 1.9 blowbye out oil cap

you people have been alot of help to my z3 basketcase car. coolant problem solved tho rough idle and seems to smooth out with oil cap removed yet alot of strong air comming out of valve cover. possible bad rings from all the coolant going through it? all a mystery as didnt run when i bought it. any help out there on this 1?
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  #2  
Old 01-03-2013, 04:37 PM
marty505 marty505 is offline
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Mein Auto: 99 Z3 M Coupe/99 540i
Could be rings, worn or even broken. Have you done a dry/wet compression test?
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  #3  
Old 01-03-2013, 07:22 PM
Blacklane Blacklane is offline
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Mein Auto: 1998 Z3 Roadster
Could be a blown head gasket or warped head due to overheating. It could also be a simple faulty CCV valve. I would start with compression test.

Has it been burning oil? Can you smell oil at the back of the car after a drive? Those are signs of a bad CCV (along with the lack of crank case vacuum, which is normally subtle, not "blow out the cap").
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Old 01-04-2013, 10:39 AM
nitrydr1600 nitrydr1600 is offline
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Location: michigan
 
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Mein Auto: 1997 z3, 1982 corvette
Quote:
Originally Posted by Blacklane View Post
Could be a blown head gasket or warped head due to overheating. It could also be a simple faulty CCV valve. I would start with compression test.

Has it been burning oil? Can you smell oil at the back of the car after a drive? Those are signs of a bad CCV (along with the lack of crank case vacuum, which is normally subtle, not "blow out the cap").
Havent driven the car yet but where is the ccv located. looks like maybe the hose comming of the valve cover goes to it? If so shouldnt i be able the remove that hose off the valve cover and determine if its bad?
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  #5  
Old 01-04-2013, 04:29 PM
Blacklane Blacklane is offline
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Mein Auto: 1998 Z3 Roadster
Some CCV tips here: http://www.bimmerfest.com/forums/sho...d.php?t=556017

A really good write-up on this site: http://www.dvatp.com/bmw/diy/icv_ccv/
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