PCV valve in passenger side valve cover
01-31-2017, 03:59 PM
#21
Dr. Detroit
Member Since: Mar 2012
Location: New Braunfels Texas
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Whether the breather for the PCV is open or a tube going to the air filter housing is of no difference......it is doing the exact same thing......
Jebby
Jebby
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Omegaspeedy (03-07-2024)
01-31-2017, 04:32 PM
#22
Had a 1976 L-82, 4-sp
Member Since: Mar 2011
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Royal Canadian Navy
How much pressure is in the crankcase with a pcv system or without? Its a positive crankcase ventilation system rather than a pressure control valve. I use two breather caps. No crankcase pressure because the blow by escapes through the breather caps and can't build pressure. No oil leaking past gaskets and seals. No oil mist all over the engine either. The filter media in the breather cap and valve cover baffles prevent that. I only drive the car a few thousand miles a year and change the oil once a year so I'm not to concerned with contaminants in the oil eating away at engine components. Also, I don't have to worry about oil mist carry over into my intake. Running an engine without a pcv system is not doom, gloom and messy engine bay. And it doesn't matter which side the pcv valve is installed as long as their is a supply of fresh air through a breather of some sort.
05-25-2017, 02:14 PM
#23
Instructor
Could a wrong PCV valve be a reason for my high oil consumption? Everytime I step on the gas my oil seems to vanish. Today I checked and the markings on the PCV says 774C which is SB 74-88 PCV valve. https://www.paragoncorvette.com/p-35...alve-774c.aspx. The setup of my engine is supposed to be close to 470 HP (not verified though), isn't the valve pulling oil at WOT?
Last edited by Vogast; 05-25-2017 at 02:14 PM.
05-25-2017, 02:30 PM
#24
Racer
Could a wrong PCV valve be a reason for my high oil consumption? Everytime I step on the gas my oil seems to vanish. Today I checked and the markings on the PCV says 774C which is SB 74-88 PCV valve. https://www.paragoncorvette.com/p-35...alve-774c.aspx. The setup of my engine is supposed to be close to 470 HP (not verified though), isn't the valve pulling oil at WOT?
On the other hand, if there is no oil pooling in the low spot at all then you can turn your attention elsewhere.
05-25-2017, 02:54 PM
#25
Vogast: your profile says you have a 69 350/350 but you say 470 HP which means it's modified. The high performance PCV valve for that time period is 746C. Not saying that will solve your problem.
05-25-2017, 03:17 PM
#26
Race Director
NO... you can, but it will not work properly.
This^^^ the rotating assembly while turning will create a small vacuum on one side and positive pressure on the other,,, cars that run 2 breathers on each side usually notice more oil on the drivers side due to the nature of the vacuum being created by the assembly turning.
This^^^^^^ is also a major problem... this will fix a lot of problems.
Hi DS,
On occasion I've read that the direction the crankshaft rotates may determine which valve cover the PCV valve should be in but there doesn't seem to be anything to actually back that up.
Having the proper valve and having it be properly baffled appears more important.
Regards,
Alan
On occasion I've read that the direction the crankshaft rotates may determine which valve cover the PCV valve should be in but there doesn't seem to be anything to actually back that up.
Having the proper valve and having it be properly baffled appears more important.
Regards,
Alan
Probably not due to the wrong valve, but possibly due to ineffective baffling in line before the valve. You should do an experiment with some clear tubing to temporarily replace the line between the valve and the manifold. Create a low spot that will act as a reservoir, and take it for a spin. Drive gently for a short distance. If you see oil pooling in the low spot, you're sucking too much oil out and you either need to improve the baffling or install a catch can to keep the oil out of the intake. If there is no oil visible, try a couple of WOT runs and check again.
On the other hand, if there is no oil pooling in the low spot at all then you can turn your attention elsewhere.
On the other hand, if there is no oil pooling in the low spot at all then you can turn your attention elsewhere.
Last edited by pauldana; 05-25-2017 at 07:56 PM.
05-25-2017, 07:11 PM
#27
Also why there is a baffle on both valve covers.
Last edited by Big2Bird; 05-25-2017 at 07:12 PM.