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Old 03-05-2008, 03:11 AM   #1
WagenSport
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Default Vent PCV to atmosphere?

I'm running 15psi on my 1990 760. I have read a bunch about overwhelming crankcase pressure with otherwise stock setups. Would it be a good idea for me to just vent it of completly, and if so where should i disconnect it. Any help would be awesome. Car runs real nice with sunoco 93 on 15psi, i just want to do the most i can otherwise to prevent ka boom.
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Old 03-05-2008, 04:29 AM   #2
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My car is vented to Atmo... but check the local laws.

No laws in Thailand.
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Old 03-05-2008, 04:43 AM   #3
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No laws in Thailand.
I'm totally moving to Thailand.
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Old 03-05-2008, 05:09 AM   #4
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Pics of catch-can/vented setups? +1
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Old 03-05-2008, 06:01 AM   #5
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I run it like that on mine... Just don't make it obvious...

Where are you located?

edit:// run it straight into the dolphin's mouth?
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Incidentally, if we're going to follow this other train of thought, you should install your spare tire while the vehicle is cruising at 55mph, since that's about where it'll be used most often.

Last edited by dbh86; 03-05-2008 at 06:09 AM.. Reason: kill the dolphins
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Old 03-05-2008, 06:09 AM   #6
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How/ where should i just disconnect the lines. ?
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Old 03-05-2008, 06:10 AM   #7
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There's a big tube going from the box underneath the intake over to pre-turbo. You should be able to disconnect it and run it right into the atmosphere.
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Old 03-05-2008, 06:13 AM   #8
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Oh? I think i know which that is. Its a line that is sort of hap-hazardly ran, goes into the rubber pipe that goes into the turbo inlet. Has some sort of sensor on it at the junction where it meets the inlet pipe?
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Old 03-05-2008, 06:31 AM   #9
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ive heard that that 'sensor' is actually a heater for the pcv system. and is able to be disconnected without consequence.
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Old 03-05-2008, 06:56 AM   #10
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Terrific, thank you for the help! Im not sure if the pressure is a serious issue at this point, but i would rather be safe then sorry.
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Old 03-05-2008, 06:56 AM   #11
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Originally Posted by lunar240z View Post
ive heard that that 'sensor' is actually a heater for the pcv system. and is able to be disconnected without consequence.
I've never seen a sensor there before.
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Old 03-05-2008, 06:55 AM   #12
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when you decide to disconnect the PCV-hoses don't forget to plug the holes in the intakesystem. You don't want false air or a boostleak.
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Old 03-05-2008, 06:59 AM   #13
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I mean there is def. some sort of sensor there if we are talking about the same line. I think its the only larger line going into the turbo inlet hose. I guess its little over an inch or so in diameter.
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Old 03-05-2008, 10:13 PM   #14
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I mean there is def. some sort of sensor there if we are talking about the same line. I think its the only larger line going into the turbo inlet hose. I guess its little over an inch or so in diameter.
It's a heater. It get 12v from the same wire as the AMM. When venting the PCV to the atmosphere do most people get rid of that Y pipe that has a nipple for a vac line to the intake?
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Old 03-05-2008, 07:00 AM   #15
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my car has it, it sits on the end of the PCV-hose where it connects to the L-shaped intakehose (the one bewteen AMM and Turbo.)
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Old 03-05-2008, 07:05 AM   #16
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Precisely! While i have a couple folks attention on this thread. Got another question for ya. My wagon has some CRAZY negitive rake. The suspension is pretty low in the back, and semi monster truck in the front. Just for now until i can afford an ipd kit or something of that variety how terrible is it to cut a dead coil or a little more off the front to either level out the suspension or maybe give it some positve rake leaning towards the front? Anyone do it to theirs?
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Old 03-05-2008, 07:14 AM   #17
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Also is there anyone that actually produces and sells 3" downpipes for a decent price!?!
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Old 03-05-2008, 08:47 AM   #18
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If you have a serious blowby issue, fix the issue, and/or run a reed valve to the exhaust.
Positive crankcase venting is a good thing.
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Old 03-05-2008, 08:51 AM   #19
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Disconnect and run it straight into the eagle's throat.




J/k
I have heard that electrical thingie on the pre-turbo hose (on later models) is a heater to prevent condensate from freezing. I could have heard wrong, though.
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Old 03-05-2008, 09:42 AM   #20
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Well i took the hose up couple mins ago, plugged up the hole in the inlet pipe and plugged up the vaccum line attached to the pcv line. Did several runs and i was getting what seemed to be a misfire around 15 psi maybe 14.5 psi. Hooked the hose back up and ran fine pulled nice all the way to 15. I dont know... i guess ill leave the earth saving fume burner connected for now.
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Old 03-05-2008, 09:52 PM   #21
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Quote:
Originally Posted by WagenSport View Post
Well i took the hose up couple mins ago, plugged up the hole in the inlet pipe and plugged up the vaccum line attached to the pcv line. Did several runs and i was getting what seemed to be a misfire around 15 psi maybe 14.5 psi. Hooked the hose back up and ran fine pulled nice all the way to 15. I dont know... i guess ill leave the earth saving fume burner connected for now.
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