MountainDew67

There is a oil vent tube on the location where you fill up the engine with oil. Its building up a milky water/oil substance in there and was wondering how to prevent this...is there something I can do? I thought I might have had water in the oil, so I did a oil change and 100% sure there is no water in the oil, just a condensation in there.


Also, where the oil filler tube goes into the rotor housings, about 2" away from the bottom of that oil filler tube, there is another type of vent tube that I have a 3/8 hose line on that vents into the atmosphere. What can I do about that hose/vent line?

My goal is to clean up the unnessary bs and make everything look cleaner, and to not have condensation in that filler tube. Thanks

bstrange99

sorry to ask a stupid question, but is this in an rx7, or a vw?

RotorMotorDriver

iTrader: (1)

The engine will be in his VW, but the PCV system will be the same. What you need to do is try and get that part of your PCV system working again. I know some people here know how to do it, but I personally cant recall. It might be in the rats nest removal tutorial though...

~T.J.

mar3

iTrader: (8)

That tube you have venting in the atmosphere is supposed to be hooked up to the carburetor. It draws the "condensate" from that oil filler tube, laden with moisture burned from the oil, back into the engine for combustion. Get a Haynes and hook it back the way it's supposed to be hooked up...

MountainDew67

This is a 67 bug with a rotary 12a behind it, adapted to a vw transmission.

Well my only problem is....I have two vent tubes, I probably should try and get a photo of the two. I think the one that would go back to the carb is the one not on the tube itself(next to it tho) but I still have the small diameter vent like tube that is litterally on the neck of the oil fill tube.

Hmm, I think this topic should have came with a picture DOH!!!

cpa7man

iTrader: (2)

What would happen if a silly person like me would plug it up?

mar3

iTrader: (8)

The one on the tube itself goes back to the carb via the tortured path of the rat's nest...

cpa7man

iTrader: (2)

Oh, i understand the correct method but me being the mechanical brain that I am plugged it up because it was spewing oil all over the motor and have since fried a rotor.

MountainDew67

Here is a picture I dug up and photochopped.
http://www.geocities.com/kewda360/rotaryybug.jpg

This points out the two vent tubes im talking about, the one on the tube and the one going behind the tube. The one going behind the tube has a thicker hose. Maybe someone can help me understand....

MountainDew67

the one on the filler tube, that can go to the intake as well? I have an open port(has plug on it now,rubber)on the RB intake.

Hyper4mance2k

iTrader: (40)

After an extensive search this was the best I could find. This subject comes up at least once a week and everyone has somethign to say, but I have yet to see pics of a solution.
https://www.rx7club.com/showthread.p...&highlight=pcv

mar3

iTrader: (8)

cpa7man...lol...I wasn't talking about your malady, I was answering the original question...was this before or after MSR last year? Yes MD67, run a one-way PCV valve like found on domestic applications and run it into the intake manifold...make sure the valve allows flow TO the intake manifold...