First my PCV is sucking oil at a rate of 1L every 300 miles since I built my new engine using total seal gapless top ring. I later found out in the installation sheet that came with rings that those ring me be the reason why so much oil is sucked by the PCV.

QUOTE: Total seal gapless rings seal so well that increased manifold vacuum and decreased crankcase pressure may lead to excessive flow in the PCV system if the engine is so equipped. For street use, it may be necessary to reduce PCV system flow to prevent oil from being pulled trough the PCV system. In most cases, a plug placed in the PCV supply side breather with a .062'' orifice is sufficient to remove all pressure without pulling oil into the induction system :UNQUOTE

The easiest solution would be to use a breather on each valve cover and be done with it but I know that bad vapor will probably ruin my engine in the long run.

Since a PCV is a must for a healthy engine does any body ever had this problem and what was your solution.

I have my doubt about having only a small hole of .062'' to let air in will be suficiant to let the PCV do it's job properly. And I can't let my engine take oil like this anymore.

Right now I'm having an open PCV system with a breather on the passenger side and the PCV valve on the driver side and my valve covers are baffled.

Hopefully someone can help me out with this one.
Thanks

PAT

 

Personally I would follow TS recomendation on that. Reducing the PCV size is going to get you what you are looking for, since your problem is that severe I would think that what they recomend is right, so try it and see if it fixes it.

Those rings do seal something fierce, another solution would be to install a crankcase evaq setup and yank the PCV. That will suck everything into your exhaust, but that's not going to be good for the cats.

Either way a baffle in front of the PCV is going to help you keep from sucking more thru the system.

Bret

 

The PCV pretty much sucks through the same amount of air regardless of how much blow-by the rings have. If it can't suck up blow-by it will suck clean air through the engine via the breather tube in the other side. It's got X amount of intake vacuum to pull air through the calibrated restriction that is the PCV valve- regardless of whether it's got blow-by vapors in it or not.

I'm more than just a little sceptical of the ring manufacturer's comments. It;ls awful damned difficult to suck liquid oil through a stock balffeld valve cover/PCV valve combination if the breather tube on the oppisite valve cover is not clogged up.

I'd do a test to try to hash this out. Go with dual breathers TEMPORARILY (few weeks, whatever seem appropriate). See if your oil consumption is decreased significantly. If it is, maybe they're right. If not, then then the probelm is elsewhere (the rings themselves).

 

I want if possible to get rid of that problem without having to install any kind of vacuum pump or an evap system plugged to the exhaust. I will probably have the same oil consumption but the difference will be that the oil won't go in the combustion process with those.

Quote:

I'm more than just a little sceptical of the ring manufacturer's comments. It;ls awful damned difficult to suck liquid oil through a stock balffeld valve cover/PCV valve combination if the breather tube on the oppisite valve cover is not clogged up.

I first found out it came from the PCV when I removed the plenum of my stealth ram and saw it was coated with oil and dripping also. The inside of the line from the PCV was also oily.

I have Proform baffled valve cover and the passenger side cover has there breather on it so I don't see how it can be clogged up??

Could also the fact that I have a Moroso high pressure high volume oil pump bring to much oil on top in a big quantity to fast and be part of the problem ???

Quote:

Go with dual breathers TEMPORARILY (few weeks, whatever seem appropriate). See if your oil consumption is decreased significantly.

I won't be able to try that until april-may to much snow and to cold outside right now.

PAT.

 

The instructions in the ring box tell you how to remedy this problem , because I had to do it on my last LT1. The hose from the passenger valve cover requires a restrictor to cut down on the suction. CHeck it out.


David

 

I can't really say that I understand most of what you guys are saying, but I think I have the same problem. I installed a Mr. Gasket (I know it's crap...) breather/PCV a few monthes back, and I noticed that oil started coming up the dipstick. I wasn't too sure whether it was from the the breather, or because of when my car overheated from a slipped fan belt.

I put a breather on the other side recently, but I'm still burning threw loads of oil.

Any advice to help me out would be greatly appreciated...

 

Quote:

because I had to do it on my last LT1. The hose from the passenger valve cover requires a restrictor to cut down on the suction. CHeck it out.

I guess I will have to give it a try, but how big a hole did you drill on the restriction you used. Did you used the .062'' like TS suggest to start with or did you went with a bigger hole.

By basicaly blocking the breather side does anybody know what kind of negative pressure the PCV system can achieve in the block. I don't want the PCV to start sucking air trough my engine seals ???

PAT

 

This is also a description of the LT1 pcv system. The LT1 system does filter and meter this fresh air (instead of just using an open breather fitted on the valve cover) which can be confusing since it does this through a fitting on the throttle body but it basically works the same way and your current described set up should not continue to allow excessive oil consuption throught the pcv.

 

umm... well?