Oil in Intake Ports!
Thread Starter
Safety Car
Joined: Jul 2005
Posts: 4,275
Likes: 4
From: Vancouver WA
Oil in Intake Ports!
I have oil in my intake ports, and it's worst at the front of the motor. I am assuming this is probably from the LS1 PVC system. My question is, is this much oil normal? And would this be a problem for the Supercharger I am putting on, as far as detonation? I just paid over $100 last year, and probably not even 500 miles ago, for Chevy to Decarb the motor. Looks like to me they didn't do a very good job.
Last edited by RED99; Jul 20, 2006 at 01:25 AM.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
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From: American Canyon Lethal Injection
I don't believe he needs a catch can on a '99. IMHO.. If he has an after market intake..K&N, Blackwing....may have too much oil on the filter..could be PCV issues also..decarb takes place in the upper cylinders...someone will chime in with the answer...
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Catch can collects a lot of oil, but won't eliminate this. I just changed heads and have a catch can, there was oil in the intake ports still yet the catch can was filling up as well.
Thread Starter
Safety Car
Joined: Jul 2005
Posts: 4,275
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From: Vancouver WA
Originally Posted by RstyNutz
I don't believe he needs a catch can on a '99. IMHO.. If he has an after market intake..K&N, Blackwing....may have too much oil on the filter..could be PCV issues also..decarb takes place in the upper cylinders...someone will chime in with the answer...
Plus I would have some serious MAF issues. The TB was completly dry on the front side. I am 99% sure this is being pulled in from the PVC. I have a brand new AMW catch can I will be installing with the Magnacharger. I am more concerned if I have a ring or valve guide/seal problem from the oil, or is this amount seem to be typical?
Safety Car
Joined: Jan 2001
Posts: 3,879
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From: Hobart, WI
Originally Posted by RED99
I installed a Vararam about 100 miles ago, but this oil isn't from a air filler being over oiled. That would be a lot of oil. Plus I would have some serious MAF issues. The TB was completly dry on the front side. I am 99% sure this is being pulled in from the PVC.
I have a brand new AMW catch can I will be installing with the Magnacharger. I am more concerned if I have a ring or valve guide/seal problem from the oil, or is this amount seem to be typical?
Plus I would have some serious MAF issues. The TB was completly dry on the front side. I am 99% sure this is being pulled in from the PVC. I have a brand new AMW catch can I will be installing with the Magnacharger. I am more concerned if I have a ring or valve guide/seal problem from the oil, or is this amount seem to be typical?
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Drifting
Joined: Aug 2000
Posts: 1,253
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From: Chapel Hill NC
Originally Posted by vettenuts
Catch can collects a lot of oil, but won't eliminate this. I just changed heads and have a catch can, there was oil in the intake ports still yet the catch can was filling up as well.
Safety Car
Joined: Jan 2001
Posts: 3,879
Likes: 3
From: Hobart, WI
Originally Posted by RED99
Stock heads, never been off the car. And the motor has 55k miles
In your case N/A
Thread Starter
Safety Car
Joined: Jul 2005
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From: Vancouver WA
I looked inside the intake ports of the magnacharger that is suppose to only have 4000 miles, and it too has oil inside the intake. My stock intake is really wet. I guess it's normal. I sure not like it though. Oil turns into carbon inside the combustion chamber, which will make Hot Spots in the combustion, which equals KaBOOM from detonation.
Your engine looks just like mine 
Hate to break it to you but I'm at 87k. Anyway, now I'm not too worried. 
Safety Car
Joined: Sep 2003
Posts: 3,558
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From: Cape Coral FL
I had a LOT of oil going into my 99's intake and head ports too. I put an LS6 PCV system on and an AMW catch can and still got a lot of oil. Then recently I re-plumbed the system and put the PCV valve BEFORE the can and the catch can to the manifold through a cheap paper fuel filter. Now I am catching oil, plenty of it, in the can and NONE in the filter. I'm going to put another 1000 miles on the car this way, measure and mark the catch can, then remove the paper filter, and do another 1200 miles that way and see what the difference is.
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FWIW I also have an AMW catch can between the air bridge, used to be the throttle body, and the valve cover. I've had it on for 9 months and haven't caught a drop there. The front of my throttle body is dry, and I even removed the oil galleys and seperator from inside the valve covers. I am using Jesel SS rockers. I go WOT a lot and have never had oil in the second can.
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If you put a catch can on and put the PCV valve before the can I think you will catch a lot more oil and keep your intake ports much cleaner than if you keep it plumbed like stock.
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FWIW I also have an AMW catch can between the air bridge, used to be the throttle body, and the valve cover. I've had it on for 9 months and haven't caught a drop there. The front of my throttle body is dry, and I even removed the oil galleys and seperator from inside the valve covers. I am using Jesel SS rockers. I go WOT a lot and have never had oil in the second can.
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If you put a catch can on and put the PCV valve before the can I think you will catch a lot more oil and keep your intake ports much cleaner than if you keep it plumbed like stock.
Racer
Joined: Dec 2003
Posts: 446
Likes: 0
From: ft. Worth tx.
Good solution a lot of us may try, Arkay99.I have a lightly used 2003 LS1, with 3300 mi. & still saw a puddle of oil at the front of the intake ,when I took of my TB!
Oil appeared to be all the way to the back of the manifold,but not as much as in front.This is with a C5 with only a few miles!?
Still think I'm going to put in a oil breather to help.Does anyone know where to get one that'll fit a C5?The universal ones wont fit without modifying the filler cap.I've asked before here how on remove the oil filler tube but no one seems to know how.You could probably get a universal one on if we could figure out how to get the tube off?
Oil appeared to be all the way to the back of the manifold,but not as much as in front.This is with a C5 with only a few miles!?Still think I'm going to put in a oil breather to help.Does anyone know where to get one that'll fit a C5?The universal ones wont fit without modifying the filler cap.I've asked before here how on remove the oil filler tube but no one seems to know how.You could probably get a universal one on if we could figure out how to get the tube off?
Thread Starter
Safety Car
Joined: Jul 2005
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From: Vancouver WA
I am not following you 100% Are you saying put the catch can between the PVC, and the T.B.?
Or are you talking about putting the catch can between the PVC, and valve covers?
Got Pics?
Or are you talking about putting the catch can between the PVC, and valve covers?
Got Pics?
Drifting
Joined: Aug 2000
Posts: 1,253
Likes: 3
From: Chapel Hill NC
Originally Posted by geocor2003
Still think I'm going to put in a oil breather to help.Does anyone know where to get one that'll fit a C5?The universal ones wont fit without modifying the filler cap.I've asked before here how on remove the oil filler tube but no one seems to know how.You could probably get a universal one on if we could figure out how to get the tube off?
PFYC is one place to get one. Thunder Racing's another.
http://www.pfyc.com/store/merchant.m...y_Code=VTUNDER
Safety Car
Joined: Jan 2001
Posts: 3,879
Likes: 3
From: Hobart, WI
Originally Posted by tcmc5
PFYC is one place to get one. Thunder Racing's another.
http://www.pfyc.com/store/merchant.m...y_Code=VTUNDER
http://www.pfyc.com/store/merchant.m...y_Code=VTUNDER
NOTE: Make sure to test fit everything first before closing the hood. If there are clearance problems, stop and find out why. On Corvettes, for example, you'll need to remove the black plastic filler neck that the oil cap goes on before installing this unit.
Last edited by see5; May 5, 2006 at 08:46 PM.
Drifting
Joined: Aug 2000
Posts: 1,253
Likes: 3
From: Chapel Hill NC
Originally Posted by see5
Will that fit under the hood?
NOTE: Make sure to test fit everything first before closing the hood. If there are clearance problems, stop and find out why. On Corvettes, for example, you'll need to remove the black plastic filler neck that the oil cap goes on before installing this unit.
NOTE: Make sure to test fit everything first before closing the hood. If there are clearance problems, stop and find out why. On Corvettes, for example, you'll need to remove the black plastic filler neck that the oil cap goes on before installing this unit.
Hood clearance is not an issue. Just unscrew the filler neck and replace it with the breather. The breather requires no more height than the filler neck does. However, since the breather comes straight out from the valve cover, the engine covers will need to be modified. On my car I don't use them.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Originally Posted by RED99
I am not following you 100% Are you saying put the catch can between the PVC, and the T.B.?
Or are you talking about putting the catch can between the PVC, and valve covers?
Got Pics?
Or are you talking about putting the catch can between the PVC, and valve covers?
Got Pics?
I'm not quite following Arkay either, pics or a sketch would be very helpful.
Racer
Joined: Dec 2003
Posts: 446
Likes: 0
From: ft. Worth tx.
Originally Posted by tcmc5
PFYC is one place to get one. Thunder Racing's another.
http://www.pfyc.com/store/merchant.m...y_Code=VTUNDER
http://www.pfyc.com/store/merchant.m...y_Code=VTUNDER