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compression in oil? #1221434 04/24/12 12:51 AM 04/24/12 12:51 AM
Joined: Apr 2007 Posts: 294 Colorado Springs,Colorado Roadrunner440-6 OP enthusiast
Roadrunner440-6 OP enthusiast Joined: Apr 2007 Posts: 294 Colorado Springs,Colorado	a friend of mine apparently has compression in his oil. Oil is coming out his oil tube. checked the head gaskets and they're fine.Also there isn't any visible oil coming out the exhausts. Any suggestions.....any help would be greatly appreciated. Thanks Last edited by Roadrunner440-6; 04/24/12 12:53 AM.

Re: compression in oil? [Re: Roadrunner440-6] #1221435 04/24/12 01:44 AM 04/24/12 01:44 AM
Joined: Jul 2007 Posts: 1,682 Philadelphia R radar top fuel
radar top fuel R Joined: Jul 2007 Posts: 1,682 Philadelphia	Bad ring seal? Valvecovers not vented properly?

Re: compression in oil? [Re: radar] #1221436 04/24/12 02:39 AM 04/24/12 02:39 AM
Joined: Apr 2012 Posts: 1,235 Phoenix, AZ Jjs72D Deep in the closet
Jjs72D Deep in the closet Joined: Apr 2012 Posts: 1,235 Phoenix, AZ	The OP may be describing what makes sense to him. I've heard it referred to as "Blow-by". As the piston rings wear and compression/cylinder pressure leaks past the rings, it will pressurize the crankcase and anywhere the oil goes. Some people will notice oil vapor in the air cleaner if they have a breather from the valve cover. Some guys may see their dipsticks pop up out of their tubes. Blow by occurs even in fresh motors, but increases as the rings wear out.

Re: compression in oil? [Re: Jjs72D] #1221437 04/24/12 06:48 PM 04/24/12 06:48 PM
Joined: Jan 2005 Posts: 12,422 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,422 Kalispell Mt.	Could be as simple as a plugged PCV valve I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: compression in oil? [Re: HotRodDave] #1221438 04/24/12 08:41 PM 04/24/12 08:41 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	The typical setup has one valvecover vent to the atmosphere and one PCV valve vent. On a stock setup, the "atmosphere" vent would be inside the air cleaner housing. In normal operation, the PCV vent sucks fumes and blow by into the intake manifold to be burned and the atmosphere vent lets fresh air in. At high load or in cases of excessive blowby, the atmosphere vent acts as a second exit for the pressure so it doesn't blow out the dipstick or cause other problems. First check, as several have mentioned, is to make sure both the atmosphere vent and PCV are installed and operational. A pic of the setup would help.

Re: compression in oil? [Re: Roadrunner440-6] #1221439 04/25/12 02:08 PM 04/25/12 02:08 PM
Joined: Aug 2005 Posts: 4,799 ILL M MLR426 master
MLR426 master M Joined: Aug 2005 Posts: 4,799 ILL	Did he over fill the oil ?? logan426

Re: compression in oil? [Re: MLR426] #1221440 04/27/12 09:42 AM 04/27/12 09:42 AM
Joined: Aug 2005 Posts: 4,799 ILL M MLR426 master
MLR426 master M Joined: Aug 2005 Posts: 4,799 ILL	Bump logan426

Re: compression in oil? [Re: MLR426] #1221441 04/27/12 07:07 PM 04/27/12 07:07 PM
Joined: Jan 2003 Posts: 541 chatham, Ilinois F fox super street
fox super street F Joined: Jan 2003 Posts: 541 chatham, Ilinois	We need more info! Is the motor a high mileage one? Does it run smooth? ( hole in a piston?) Is it sitting on level ground?

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