My version of an oil removal device
My version of an oil removal device
Same idea as Jay but not as big or bulky....

I fixed it...now I can't post my own pics...

I fixed it...now I can't post my own pics...
Last edited by JeffsLightning; Jun 3, 2002 at 09:01 PM.
OK I can see how this keeps oil out of the intake manifold under normal driving and while the the intake in running under a vac. Any oil that goes thru the cheap PCV valve would drop out here right. OK now when your in the throttle and a positive boost is being made the air flow should be reversed and flowing out of the intake manifold thru the PCV valve backwards (which is why we have one to allow pressure to be released from the crankcase if there is any and to try and stop the crank case from being pressured up when the manifold is positive) the air then comes out the drivers side valve cover and thru the other hose and right into the intake air duct and all over the throttle body. I insatlled an aviation fuel flow check valve in the line directly above my PCV when the truck was new and now over a year later there is absolutly no oil in my air intake or throttle body. This check valve allows the pressure to be released out of the pass. side valve cover but will not let pressure in when the flow reverses. Just some food for thought.
Here is another picture. This device is an oil removal filter that you normally use for an air compressor. I found it at Menards. The whole setup cost like 30 bucks. It does remove oil. It's not as big as some of the other filters but I'm always under the hood of my L anyway so I can check it often.
Since this does not weigh much at all no brackets or extra long hoses were needed. I think I will look for some smaller hose clamps as to please my buddy StruckBy99 (Jason)

Since this does not weigh much at all no brackets or extra long hoses were needed. I think I will look for some smaller hose clamps as to please my buddy StruckBy99 (Jason)
Last edited by JeffsLightning; Jun 3, 2002 at 08:59 PM.
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Cant wait to see it up close. I cant make it out very well from the picture. I want to do that soon!!
Hey Jeff. Go to the auto parts store (NAPA
) and get some of the black clamps similar to the ones on the intercooler hoses.
That will help you with the 'stealth' look your always going for
Jason
Hey Jeff. Go to the auto parts store (NAPA
) and get some of the black clamps similar to the ones on the intercooler hoses.That will help you with the 'stealth' look your always going for
Jason
USA, the system is always under vacuum, except when you have massive blowby. The inlet tubes are on top of the blower. With the throttle closed, you have normal engine vacuum.
When you open up the throttle, the vacuum drops off, until the blower speeds up, and the vacuum on top of the blower increased again. The oil draw is pretty much constant, increasing with engine RPM.
Is that check valve mounted vertically? It must allow the oil to stop and drain back into the valve cover. Have any pic's?
When you open up the throttle, the vacuum drops off, until the blower speeds up, and the vacuum on top of the blower increased again. The oil draw is pretty much constant, increasing with engine RPM.
Is that check valve mounted vertically? It must allow the oil to stop and drain back into the valve cover. Have any pic's?
Thanks Jay, but again how does this keep the oil out of the intake boot and throttle body. I'll get a pic of the check valve in the morning to show you. The pressure has to be going backwards thru the engine and out the drivers side then into the intake boot thru the hose connecting them to get oil into the boot. Isn't that what a PCV is for to help stop the flow from going into the engine? Its just that none of the PCV's are positive shut off.
Last edited by usahooters; Jun 3, 2002 at 09:55 PM.
USA, on my truck, the passenger's side PCV line was sucking oil under vacuum, up to the port just behind the IAC. This port is always under vacuum, because it is between the throttle body, and the blower inlet. Under boost, the area just above the blower is pretty high vacuum also.
For some reason, the PCV valve is exposed to a lot of oil. I think, it is probably an unbaffled valve cover. There is a lot of splash coming off of the spinning cam as well, which is directly below the PCV valve.
The driver's side port is located in front of the throttle body, so it "sees" less vacuum, relative to the other, located above the blower. I don't think it has enough vacuum to pull much oil. I tested the filter in that side first, and over about 3 weeks, I got no oil.
When I changed it to the other side, I filled about 1 oz. in 20 miles. I suspect that the filter was just clearing the inlet line, as there hasn't been that much over that last 500 miles (1 week).
The PCV valve is open under pressure from blowby, or vacuum from above. The function of the PCV is to close when there is positive pressure above it. This happens when there is a backfire through the intake (rare these days with fuel injected enginge) or when there is a pressure differential from one side to the other.
I just checked it again, and the boot is clean and dry from both sides.
For some reason, the PCV valve is exposed to a lot of oil. I think, it is probably an unbaffled valve cover. There is a lot of splash coming off of the spinning cam as well, which is directly below the PCV valve.
The driver's side port is located in front of the throttle body, so it "sees" less vacuum, relative to the other, located above the blower. I don't think it has enough vacuum to pull much oil. I tested the filter in that side first, and over about 3 weeks, I got no oil.
When I changed it to the other side, I filled about 1 oz. in 20 miles. I suspect that the filter was just clearing the inlet line, as there hasn't been that much over that last 500 miles (1 week).
The PCV valve is open under pressure from blowby, or vacuum from above. The function of the PCV is to close when there is positive pressure above it. This happens when there is a backfire through the intake (rare these days with fuel injected enginge) or when there is a pressure differential from one side to the other.
I just checked it again, and the boot is clean and dry from both sides.



How's it working so far?