High Crankcase Pressure
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
High Crankcase Pressure
What can cause high crankcase pressure???...all of sudden I'm blowing a bunch of oil into my Procharger charging pipes (PCV is stock routed to the filter off the S/C head ..so oil is dripping into the pipes and out the blow off filter). Car an 01 and is still running great.
Le Mans Master
Joined: Oct 2005
Posts: 7,083
Likes: 1,829
From: Metro Detroit Michigan
Need more information.
Are you using a breather?
PCV runs to the intake, and crankcase supply runs to the air filter?
PCV shuts properly under boost, and isn't turned backwards?
Are you using a breather?
PCV runs to the intake, and crankcase supply runs to the air filter?
PCV shuts properly under boost, and isn't turned backwards?
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
On the Procharger kit the air cleaner is fabriated into the fan shroud and connects to the head of SC. PCV is plugged into the intake and is routed into the filter at the S/C head...
PCV still comes out of the intake (stock valve and connection). I cant see how it could be installed backward because of the cable strap and the way the housing is made to seal the lip the of the PCV ....anyway, the valve portion of the PCV is facing away from the intake.
Bottom line, oil is coming of the forward hose of the left bank (looking at engine) valve cover.
I have been running it very hard trying to get my new methanol setup pumping right..so we've been boosting quite a bit.....
PCV still comes out of the intake (stock valve and connection). I cant see how it could be installed backward because of the cable strap and the way the housing is made to seal the lip the of the PCV ....anyway, the valve portion of the PCV is facing away from the intake.
Bottom line, oil is coming of the forward hose of the left bank (looking at engine) valve cover.
I have been running it very hard trying to get my new methanol setup pumping right..so we've been boosting quite a bit.....
Last edited by Hvymtlc5; Jun 18, 2008 at 02:37 PM.
Tech Contributor
Joined: Jan 2007
Posts: 19,353
Likes: 1,125
From: Dyer, IN
On the Procharger kit the air cleaner is fabriated into the fan shroud and connects to the head of SC. PCV is plugged into the intake and is routed into the filter at the S/C head...
PCV still comes out of the intake (stock valve and connection). I cant see how it could be installed backward because of the cable strap and the way the housing is made to seal the lip the of the PCV ....anyway, the valve portion of the PCV is facing away from the intake.
Bottom line, oil is coming of the forward hose of the left bank (looking at engine) valve cover.
I have been running it very hard trying to get my new methanol setup pumping right..so we've been boosting quite a bit.....
PCV still comes out of the intake (stock valve and connection). I cant see how it could be installed backward because of the cable strap and the way the housing is made to seal the lip the of the PCV ....anyway, the valve portion of the PCV is facing away from the intake.
Bottom line, oil is coming of the forward hose of the left bank (looking at engine) valve cover.
I have been running it very hard trying to get my new methanol setup pumping right..so we've been boosting quite a bit.....
Tech Contributor
Joined: Jan 2007
Posts: 19,353
Likes: 1,125
From: Dyer, IN
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
The PCV should not be routed between the air filter and intake, it should run from the manifold to the intake. The hose from the passenger side front valve cover should run to the air filter..this is your fresh air intake. Where is the hose going on the passenger side valve cover now that oil is coming out?
The hose off the passger side front valve cover goes to the Procharger air filter system this is where all the oil is dumping into/behind the the filter system and I'm guessing the SC is sucking it up and it's getting into the charging pipesa and dripping out the blowoff vent/filter
The Procharger has been on for a couple of years...all of a sudden were dumping a lot of oil (several ounces) on a short drive.
Last edited by Hvymtlc5; Jun 18, 2008 at 05:41 PM.
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Tech Contributor
Joined: Jan 2007
Posts: 19,353
Likes: 1,125
From: Dyer, IN
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Guys - were talking a lot of oil...not just a little mist that you could vent to the outside air....stuff is pouring out.
With that said..anyone got an new ideas on what could be wrong all of a sudden?
Would a defective oil filter cause high pressure?
With that said..anyone got an new ideas on what could be wrong all of a sudden?
Would a defective oil filter cause high pressure?
Tech Contributor
Joined: Jan 2007
Posts: 19,353
Likes: 1,125
From: Dyer, IN
You seem to be sidestepping this issue, but step one for me would be to confirm that you have the pcv/fresh air hooked up correctly, because based on your description, it does not sound like it is. I know it just started, but it concerns me on how you explained the connections. If you have oil pushing out of the motor, you could have blockage in a hose(pcv stuck), or a significant increase in blowby, in which case the small fresh air and pcv lines are no longer adequate and a breather system my be required.
Drifting
Joined: Mar 2005
Posts: 1,737
Likes: 0
From: Northern VA
You seem to be sidestepping this issue, but step one for me would be to confirm that you have the pcv/fresh air hooked up correctly, because based on your description, it does not sound like it is. I know it just started, but it concerns me on how you explained the connections. If you have oil pushing out of the motor, you could have blockage in a hose(pcv stuck), or a significant increase in blowby, in which case the small fresh air and pcv lines are no longer adequate and a breather system my be required.
How about posting up your exact setup, and some pictures showing your PCV configuration.If oil is indeed "pouring out", it should be obvious.
Also, what cam you have, and what your idle vacuum reading is would be helpful as well.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Trying to help.....Not side stepping anything. I've changed nothing in this setup over the last two years. Oil is coming out the line, left front bank that goes the my Procharger air filter setup. Didn't this same line got to the TB before on a stock setup or did it go to the airbox?
My factory PCV sytem is stock (with exception of where it now plugs into) and the PCV is not plugged - the valve moves freely back and forth (but I guess it could still be bad).
I'm getting puddles on the floor now and never did two weeks before we began running the car for the tune and the meth setup.
Cam is stock with vacuum @ 20 at idle.
Would a defective oil filter cause this? I changed the oil/filter two weeks ago before testing began.
This came about all of a sudden....it's not due to normal wear, but could be due to a failure in the engine - but car is running too good.
My factory PCV sytem is stock (with exception of where it now plugs into) and the PCV is not plugged - the valve moves freely back and forth (but I guess it could still be bad).
I'm getting puddles on the floor now and never did two weeks before we began running the car for the tune and the meth setup.
Cam is stock with vacuum @ 20 at idle.
Would a defective oil filter cause this? I changed the oil/filter two weeks ago before testing began.
This came about all of a sudden....it's not due to normal wear, but could be due to a failure in the engine - but car is running too good.
Last edited by Hvymtlc5; Jun 19, 2008 at 11:02 AM.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Car is an 01, PCV connects to junction at the manifiold and hose runs toward the back of the engine. Oil is coming out the frint passeger vent line.
Last edited by Hvymtlc5; Jun 19, 2008 at 11:21 AM.
Drifting
Joined: Mar 2005
Posts: 1,737
Likes: 0
From: Northern VA
The only other thing I can think of is that your PCV is allowing boost into the crankcase. I have a check valve installed to insure against this.
You may just need a breather setup on the oil filler.
Why not run the line that is connected to the air filter into a container so that you can measure how much oil volume we are talking about.
Le Mans Master
Joined: Oct 2005
Posts: 7,083
Likes: 1,829
From: Metro Detroit Michigan
Disconnect your PCV valve from the manifold, and try blowing backwards (toward the valve covers) through it. It should close and seal. If it doesn't, you'll blow boost into the crankcase. It should pass air in the other direction (toward the intake manifold).
If that's not the problem, it might be time for a leakdown test on the engine.
If that's not the problem, it might be time for a leakdown test on the engine.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Some good things to try - thanks.
I'm being told now on another forum that continued / multiple boost runs will produce the oil I'm talking about...could very well be, since I have never driven this car that hard before for so many WOT passes at a time like I've done this past week. I bet we have at least 12-15 full boost passes to get the meth spray dialed in right
Can someone explain the check valve solution mentioned above and where I can "buy" this solution?
I'm being told now on another forum that continued / multiple boost runs will produce the oil I'm talking about...could very well be, since I have never driven this car that hard before for so many WOT passes at a time like I've done this past week. I bet we have at least 12-15 full boost passes to get the meth spray dialed in right
Can someone explain the check valve solution mentioned above and where I can "buy" this solution?
Le Mans Master
Joined: Oct 2005
Posts: 7,083
Likes: 1,829
From: Metro Detroit Michigan
The check valve helps if your PCV valve is failing to close under boost pressure like it should. You can get them from McMaster Carr. Don't know the part number.
What many of us do successfully is run an ECS breather on the filler cap, and disconnect that line going to the air filter. Some others leave the line, and install a catch can in it somewhere.
What many of us do successfully is run an ECS breather on the filler cap, and disconnect that line going to the air filter. Some others leave the line, and install a catch can in it somewhere.