breather/tank vent valve???

[m3f_blink21me]

I gotta replace my tank vent valve and couldn't find a DIY instructions on how to do it. Any of you guys know of one? I also seem to can't find it in my Bentley manual. Anybody has a pic of it in the car? Any help is much appreciated.



thanks

[m3f_blink21me]

anybody???

[m3f_KnudsonsM3]

Sorry i know not but,



Its late and people have gone to bed.



Give em time people will respond.

[m3f_blink21me]

that's a day difference between my posts...

[m3f_ThewsM3]

It is a valve that separates oil vapor out of the intake air. To check this (the easy way, not the most reliable) start your car, while running, SLIGHTLY open the oil fill cap. If there is a HUGE ( I mean HUGE) vacuum on the, almost to where you can't remove the cap, the valve is bad. If there is no vacuum at all the valve is bad. There SHOULD be a slight amount of vacuum, not too much, not too little.

[m3f_ThewsM3]

The official BMW procedure is to remove the intake manifold, and then take off the end cover valve (aka crankcase vent valve, cyclone separator, oil separator,etc., etc.). The basic thinking is that you might as well reseal the intake manifold, replace the end cover valve, and reseal the throttle valve in one sitting.

But although the space is tight, most mechanics take it directly from the rear(provided you are sure that the intake manifold does not need resealing). The throttle valve seal can be easily accessed infront.

Buy the valve first so that it gives you an idea what you are supposed to remove.


Have fun! Remember that the labor charge for this operation is 3.5 to 4 hours which you would save yourself.

[m3f_blink21me]

The official BMW procedure is to remove the intake manifold, and then take off the end cover valve (aka crankcase vent valve, cyclone separator, oil separator,etc., etc.). The basic thinking is that you might as well reseal the intake manifold, replace the end cover valve, and reseal the throttle valve in one sitting.

But although the space is tight, most mechanics take it directly from the rear(provided you are sure that the intake manifold does not need resealing). The throttle valve seal can be easily accessed infront.

Buy the valve first so that it gives you an idea what you are supposed to remove.



Have fun! Remember that the labor charge for this operation is 3.5 to 4 hours which you would save yourself.

I was quoted by Edge Motorworks for 0.80 hrs, they told me that the valve is nothing that big of a deal and if I ever get the time I myself can do it without a sweat... ever done it before? thanks!