crankcase venting
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
crankcase venting
Are you guys running any vacuum pumps, etc to evacuate the crankcase? Right now, I have individual hoses attached to all four "vent lines" on the valve cover, and a filter mounted on the oil cap. I don't have anything attached to the intake ports right now
Thoughts?
Thoughts?
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I have one -10 off of each valve cover runnig to a vented catch can. I kow someone with a vacuum pump and it works really well. Spendy though. Are you having crankcase pressure problems(oil out the rear main seal)?
Team Owner
Joined: Jan 2007
Posts: 29,062
Likes: 1,838
From: cookeville tennessee
Are we talking a V/pump on a c5 with air and everything on the car. Are you talking about a full race car here. I didn't think anyone made one for a c5. MORE INFO HERE...Robert
Drifting
Joined: Apr 2008
Posts: 1,607
Likes: 0
From: TIRECRAFT RACING NJ
Bolt on C5/C6 corvette Vacuum Pump System . Works of belt tensioner . Keeps factory A/C.
http://www.gzmotorsports.com/SPVPK-L...-pump-kit.html
http://www.gzmotorsports.com/SPVPK-L...-pump-kit.html
Team Owner
Joined: Jan 2007
Posts: 29,062
Likes: 1,838
From: cookeville tennessee
Bolt on C5/C6 corvette Vacuum Pump System . Works of belt tensioner . Keeps factory A/C.
http://www.gzmotorsports.com/SPVPK-L...-pump-kit.html
http://www.gzmotorsports.com/SPVPK-L...-pump-kit.html
I just got off the phone with them, The guy told me no way to work one of these with a blower on the car.
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
I have small amounts of oil on the very back/bottom of the oil pan (from about the wings back) I have pulled the inspection cover 3 different times, and can't see a single drop anywhere in it or around the rear seal. I checked the dipstick tube entrance, and had to pull the valve cover to replace a bad oil sending unit (thought it was that) and didn't see any oil on the back.
I simply can not find the source, and it drives me crazy because it is a new engine!!!
I was just making sure I was venting properly, and one of the motor guys had mentioned running a "vacuum" pump.
This is a pure street engine, not a race car.
Melting Slicks
Joined: Sep 2006
Posts: 2,721
Likes: 104
From: Florida
I had an oil leak on the backside of my engine awhile ago. I to thought it was the OPSU, sounded like a common problem. Replaced that but still dripping oil on my LT header. Turned out to be a bad o-ring on the cam sensor.
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Drifting
Joined: Apr 2008
Posts: 1,607
Likes: 0
From: TIRECRAFT RACING NJ
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
It sounds like you don't have enough crankcase venting and are pusing it out the rear main. It's hard to see because it hits the back of the flyweel and gets spun around. There is oil inside the inspection cover?
It doesn't look like I have any oil "mist" coming out of the hoses AT ALL, but I do have a small leak SOME WHERE at the back of the engine (newly built)that I can't find for the life of me
I have small amounts of oil on the very back/bottom of the oil pan (from about the wings back) I have pulled the inspection cover 3 different times, and can't see a single drop anywhere in it or around the rear seal. I checked the dipstick tube entrance, and had to pull the valve cover to replace a bad oil sending unit (thought it was that) and didn't see any oil on the back.
I simply can not find the source, and it drives me crazy because it is a new engine!!!
I was just making sure I was venting properly, and one of the motor guys had mentioned running a "vacuum" pump.
This is a pure street engine, not a race car.
I have small amounts of oil on the very back/bottom of the oil pan (from about the wings back) I have pulled the inspection cover 3 different times, and can't see a single drop anywhere in it or around the rear seal. I checked the dipstick tube entrance, and had to pull the valve cover to replace a bad oil sending unit (thought it was that) and didn't see any oil on the back.
I simply can not find the source, and it drives me crazy because it is a new engine!!!
I was just making sure I was venting properly, and one of the motor guys had mentioned running a "vacuum" pump.
This is a pure street engine, not a race car.
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
I basically have all 4 "holes" vented to the atmosphere and a 5th through a filter in the oil cap. Don't know what.else to do.
Team Owner
Joined: Jan 2007
Posts: 29,062
Likes: 1,838
From: cookeville tennessee
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Pro
Joined: Sep 2008
Posts: 660
Likes: 16
From: Tustin California
Mine did the same thing and it drove me nuts. No drips but a little oil collected on the bottom of the pan. Turned out it just needed the lower pan gasket changed. I also put teflon tape on all the bolt threads and no leaks at all. Good luck, Rod