Fixing the intake manifold and PCV for good
- Thread starter Flyer
- Start date
mja
Site Supporter
The bypass the bypass solenoid mod uses the stock strong vac. source from the air bladder under the manifold. This is the only way I know of to bypass the BPV solenoid without throwing codes.
You'd have to run a strong vac source to the BPV solenoid input if doing this mod. I'm not sure there's another way around it other than an external vacuum tank.
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Time for an update ...
After driving on this for a while .. there are a couple of things to note. After a few miles, let's say around a couple of hours straight driving, especially hard driving around 80-90 the catch can will fill up. After it fills up there will be a steady stream of oil smoke from the exhaust, only at idle. I'm not real sure why this happens, but I can only assume it's from increased crank case pressure from the catch can being FULL!
With that being said .. THIS is the catch can I used. I did fill it with some STEEL WOOL though.
The theory here is to have a substrate to catch the condensate (smoke) to turn it back into liquid. That being said I had to make a trip to the local hardware store to find a piece of poly tubing to fit into the inside of one of the fittings to force the incoming vapor down into the catch can so that it has to go through the steel wool. I also did not use the hose that came with the catch can. Instead I used some rubber line. It was either some fuel line or vacuum line .. I forget.
I will say .. this is not a maintenance free modification, but it will for sure catch the vapor coming from the crankcase ventilation.
After driving on this for a while .. there are a couple of things to note. After a few miles, let's say around a couple of hours straight driving, especially hard driving around 80-90 the catch can will fill up. After it fills up there will be a steady stream of oil smoke from the exhaust, only at idle. I'm not real sure why this happens, but I can only assume it's from increased crank case pressure from the catch can being FULL!
With that being said .. THIS is the catch can I used. I did fill it with some STEEL WOOL though.
The theory here is to have a substrate to catch the condensate (smoke) to turn it back into liquid. That being said I had to make a trip to the local hardware store to find a piece of poly tubing to fit into the inside of one of the fittings to force the incoming vapor down into the catch can so that it has to go through the steel wool. I also did not use the hose that came with the catch can. Instead I used some rubber line. It was either some fuel line or vacuum line .. I forget.
I will say .. this is not a maintenance free modification, but it will for sure catch the vapor coming from the crankcase ventilation.
Llia
New member
Still considering the Cruze Forum Fix
I am looking into this mod
Exhaust Driven PCV
This way the gasses are taken out by the exhaust instead of in front of the Turbo.
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First would be testing the system if it can pull vacuum at all RPM's so having a straight pipe after the cat(s) and having the bung welded in. Then connecting a vacuum gauge to register vacuum. If that tests ok then connect it to the PCV system with check valve.
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This is an all in one system. Could replace valve cover burst things too?
--------on Amazon--------
Just noticed that Mann & Hummel produce the oil separator as well as our intake manifold. So perhaps they are both the solution and the problem.
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I am looking into this mod
Exhaust Driven PCV
This way the gasses are taken out by the exhaust instead of in front of the Turbo.
..
First would be testing the system if it can pull vacuum at all RPM's so having a straight pipe after the cat(s) and having the bung welded in. Then connecting a vacuum gauge to register vacuum. If that tests ok then connect it to the PCV system with check valve.
.
This is an all in one system. Could replace valve cover burst things too?
--------on Amazon--------
Just noticed that Mann & Hummel produce the oil separator as well as our intake manifold. So perhaps they are both the solution and the problem.
.
.
.
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Blue Moon Sonic
New member
I know this would be a dumb thing to ponder on, but wouldn't it be a good idea to run 2 oil/air seperators on this car after doing the cruze forum fix? Then you can have a catch can before the throttle body spacer after the PCV valve and then another can in line with the PCV hose going to the turbo inlet from the intake manifold. This way, the PCV contents wouldn't be contaminating the inside of the intake manifold/throttle body or the turbo inlet.
The other reason for this is not just to extend the turbo's life, but to also keep the octane reduction at bay from the PCV contents from entering the combustion chamber.
The reason I suggest this is because the throttle blade itself could get coked up with oil from the PCV and cause the throttle body to not respond as it should. The Ford Modular engines have this issue because of how the PCV system is designed. Without a CC or PCV hose delete kit, you would have to pull the intake manifold and throttle body every 3 months for cleaning or you pop a CEL.
Just my .02 on the matter after looking at the cruze forum fix a bit more and realizing this may be an issue.
The other reason for this is not just to extend the turbo's life, but to also keep the octane reduction at bay from the PCV contents from entering the combustion chamber.
The reason I suggest this is because the throttle blade itself could get coked up with oil from the PCV and cause the throttle body to not respond as it should. The Ford Modular engines have this issue because of how the PCV system is designed. Without a CC or PCV hose delete kit, you would have to pull the intake manifold and throttle body every 3 months for cleaning or you pop a CEL.
Just my .02 on the matter after looking at the cruze forum fix a bit more and realizing this may be an issue.
Llia
New member
I was thinking two as well.
But contaminants come from the middle port.
So it would be
Turbo <--- Check Valve <--- Catch Can A <--- Port ---> Catch Can B ---> PCV Valve ---> TB Spacer
(Check Valve Prevents the intake manifold from bypassing the turbo. It's part of the stock PCV hose where it connects to the turbo)
Catch can before the pcv would keep the PCV valve clean extending it's life.
Best probably to Tee off of the Catch Can instead of Teeing off the middle port on the manifold. which would put the catch can in the middle and you'll only need one catch can to filter both sides.
But contaminants come from the middle port.
So it would be
Turbo <--- Check Valve <--- Catch Can A <--- Port ---> Catch Can B ---> PCV Valve ---> TB Spacer
(Check Valve Prevents the intake manifold from bypassing the turbo. It's part of the stock PCV hose where it connects to the turbo)
Catch can before the pcv would keep the PCV valve clean extending it's life.
Best probably to Tee off of the Catch Can instead of Teeing off the middle port on the manifold. which would put the catch can in the middle and you'll only need one catch can to filter both sides.
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Tormach
Member
Could you post a pic of your setup, I am running only one CC ATM.
If the pcv goes in this new intake down the road I'll be doing the Cruze fix.
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Llia
New member
INSIDE
~1" long Tubes (blue) give surface area and create a screen. The tubes plastic material may be thermally different enough to grab oil? There will be one large tube running from the crankcase and exit on the right side of the screen (not shown). Gasses will take a 180 and flow back through the screen and be greeted by the K&N crankase filter inside the catch can connected to the port that hooks to the turbo pcv hose.
The Tee is just for later when I do my version of the Cruze Forum mod. Minus the Throttle Body spacer. I may end up having the T go out the back. I'll need to rework my baffling inside the catch can for it to route that way.
Slight change of plans due to space restrictions inside can.
Attachments
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IMG_20170818_193423.jpg
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Llia
New member
Thanks
I think above the intake manifold off of the firewall
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I want to film the gauge in operation. See if it is pulling too much vacuum and sucking out oil. Messing up the air fuel mixture. Doesn't have enough vacuum or worse. It shows boost leakage into the pcv.
What is the stock flow or vacuum/pressure reading of the crankcase? They say you can connect a vacuum gauge to the oil dipstick port to check that. But we'd need a new car or technical documents to get the baseline.
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2014 Blue RS
Active member
Llia, that's THE nicest catch can setup I've seen on here.
Any chance you'd put one together for a fellow member? [emoji16][emoji16][emoji16]
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Any chance you'd put one together for a fellow member? [emoji16][emoji16][emoji16]
Sent from my SM-G950U using Tapatalk
