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-   -   Z4 rattling sound under cylinder cover (

oliviasz 01-19-2013 12:35 PM

rattling sound under cylinder cover
Having a noise on 2003 z4 causing me concern. Rattling sound under cylinder head cover when accelerate or rev engine. Have removed cover but do not know what i am looking for. Does not seem to affect performance.anything a novice can look for or is it more serious?

Droptop85 01-21-2013 02:21 AM

Might be your vanos system. May be time for a rebuild

Uber-Fritz 01-21-2013 01:54 PM

Are you positive that is where the noise is coming from? Can you reproduce it your garage? A "rattle" sounds awfully terminal if it is truly coming from your valve train, but it could just as easily be something loose in the immediate vicinity.

imz4n 01-22-2013 09:30 AM

Could be the DISA valve. Do a search and see if the rattle match what you have going on. The DISA and be unplugged to eliminate as a problem. This is on a e46 however the same applies to the Z4.

oembimmerparts 01-23-2013 07:59 AM

The freezing weather this winter is taking out DISA valves all over, We have been selling them as fast as we can get them in. Im betting disa aswell.


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