S52 Crancase Breather Valve/PCV Valve

[bdi_fc]

Since I used the 525 oil pan, the dipstick doesn't have the drain stem for the oil from the PCV/crankcase breather tube.

What'd you guys do about this? I just routed the whole piping to the intake manifold and figured I'd let it suck in any oil instead of trying to recapture it. I'd imagine this works as well as the 95 S50 OBDI setup since they ended up changing it with the cyclone cylinder in the OBDII setups.

Thanks in advance for any input!

[Jason89i]

Since I used the 525 oil pan, the dipstick doesn't have the drain stem for the oil from the PCV/crankcase breather tube.

What'd you guys do about this? !

most people do what you just did. pipe the breather straight to the intake elbow. ... like the obd1 systems. i personally feel the obd2 oil seperator is a better solution. you just need to find a place to drain the oil.

the euro s50b32 has a system that really needs to be plumbed back to the pan. i took the obd2 dipstick tube, cut off the drain pipe, and welded it onto the new 525i obd1 dipstick tube.

caution. dont mix up your dipsticks. they look the same, but a few are DIFFERENT lengths. it would be tragic to have a long dipstick w/ a shorter tube.

cheers, jason

[trent]

Wouldn't it make sense to NOT route this into the intake? I could see this being a few HP difference (and a less cruddy intake). Any good solutions? Can the crankcase vents just be closed or diverted back to the top of the pan or anything?

[Jason89i]

Wouldn't it make sense to NOT route this into the intake? ....... Can the crankcase vents just be closed or diverted back to the top of the pan or anything?

i personally feel the obd2 oil seperator is a better solution. you just need to find a place to drain the oil. ...... i took the obd2 dipstick tube, cut off the drain pipe, and welded it onto the new 525i obd1 dipstick tube. cheers, jason

as stated earlier....look at the obd2 system. it uses an oil seperator. valve cover breater goes to oil seperator. this seperates oil vapor from the air. air goes to intake, oil gets drained to dipstick tube. (the euro oil seperator drains the oil into the pan through a dedicated tube....but the e36 pan does not fit this conversion. )

u.s. obd2 spec
http://www.realoem.com/bmw/showparts...87&hg=11&fg=15

euro s50b32 spec
http://www.realoem.com/bmw/showparts...64&hg=11&fg=15

cheers, jason

[2002maniac]

a catch can would be a good solution.

[trent]

as stated earlier....look at the obd2 system. it uses an oil seperator. valve cover breater goes to oil seperator. this seperates oil vapor from the air. air goes to intake, oil gets drained to dipstick tube. (the euro oil seperator drains the oil into the pan through a dedicated tube....but the e36 pan does not fit this conversion. )

hmmmm....i think the top of the pan could be tapped like an s14 pan..

[BeirBrennerE30]

dont route the vent form the valve cover to the diptube with no other vent... this will blow all your seals...

the easiest way is to route from the valve cover to the intake elbow with a catch can in between if you are concerned about oil in the intake

its also acceptable to just put a little filter on the valvecover outlet... a healty motor should NOT spit out much oil

imho the best way is to run it form the valve cover to a catch can and from the catch can to the exhaust using a one way check valve... this ensures that there is still vacuum in the crankcase(desirable) while also ensuring that your intake wont get gunked up with oil

[bdi_fc]

Thanks for the responses.

I think I'm going to leave it the way it is with the assumption I have a healthy motor that shouldn't be spitting too much oil into the intake. This way I can maintain the vacuum in the valve cover.