NEED ADVISE e46 n42 valve cover leaking

[chaboy]

hi to all bimmeri change already new valve cover gasket but still leaking at the back... top of vacuum pump2nd time i re open it put gam gasket but still same....got leaking again....what i patut buat sekarang..... maybe get a new original gasket or ??????every morning i start got asap will keluar n after 3min it gone..... pening..... pls help...tq2View attachment 30954

 

[Chip Yoose]

As advise by the dealer tech: Replace the rocker cover.

But prior to that are you sure the installation of the new gasket is correct. If the rocker cover is being tighten to tight it will deformed the rubber gasket. That what caused the leak.

 

[Iceduke]

besides overtightening, you could also be using a substandard sealant. The one I used which is recommended by the mech is Victor-Reinz which can withstand up to 300c. So far so good.

But no matter how sealed it is, mind you n42s have a habit of leaking eventually as the quality of seals does seem to not last long...

Mine and another forummer's vacuum pump and cam solenoid o-seals both changed twice in a span of 1 year... ... the reality of n42s....

 

[Iceduke]

the important area to watch out for is the vacuum pump area which is behind at the end of the engine block...if it leaks you just change the 2 o-rings in it (1 big 1 small). Dont have to replace the entire unit as its purely mechanical unit, no springs nuthing. Mechs who ask u to change just clearly wanna make some moolah as the unit cost 800-1k depending on who u go to

Hope this info helps. Cheers.

 

[Chip Yoose]

besides overtightening, you could also be using a substandard sealant. The one I used which is recommended by the mech is Victor-Reinz which can withstand up to 300c. So far so good.

But no matter how sealed it is, mind you n42s have a habit of leaking eventually as the quality of seals does seem to not last long...

Mine and another forummer's vacuum pump and cam solenoid o-seals both changed twice in a span of 1 year... ... the reality of n42s....

the important area to watch out for is the vacuum pump area which is behind at the end of the engine block...if it leaks you just change the 2 o-rings in it (1 big 1 small). Dont have to replace the entire unit as its purely mechanical unit, no springs nuthing. Mechs who ask u to change just clearly wanna make some moolah as the unit cost 800-1k depending on who u go to

Hope this info helps. Cheers.

Good info iceduke. I guess mine having the same problem. Plan to rectify it next monday.

Thank you for sharing. :top:

Sent from my GT-P6800 using Tapatalk 4 Beta

 

[chaboy]

THANK ALL..
maybe try to open it for 3rd time... used a good sealant

 

[astroboy]

Sometime it's the oil cap gasket. Check out my blog.. some useful tips there..

http://upgr8s.blogspot.com/2013/06/bmw-e90-diy-rocker-valve-cover-gasket.html

Mine suffer from leak and serious oil loss too.. I recently changed my rocker cover gasket, refit my oil housing gasket and flipped my oil cap gasket. If still leak, am suspecting the eccentric shaft sensor O-ring [item 7 below]

 

[chaboy]

no 7 i change already new...