PCV Valve Questions

[winnipeg69]

I have a 1969 Small block car. I have had oil consumption and leak problems. Reading other posts I think I have a couple of problems. I have moroso valve covers, with open brathers on both sides. the covers also have no baffles so I can see the lifters. If I was to add the PCV valve what does it get connected to?? Should I just go to a stock steel valve cover to see if it solves my problem??
Sorry about the long winded post.

Thanks in advance
Mike

 

[drags1998]

Mike, you will have the best luck with Stock covers,But you can make the MOROSO covers work if you install a baffle in the cover WITH the PCV valve!!!! Heck, Install a baffle in BOTH covers,FOR BEST RESULTS!!!!! With the correctly installed baffles you should be all set. Good Luck!!!! Paul

 

[Robin7TFour]

Mike you do need a baffle under the PCV fitting. otherwise it will suck oil into the combustion chamber.
are you burning oil noticibly?

 

[winnipeg69]

I don't drive it a ton but it is noticible consumption. I am cleaning up a set of stock baffled covers to put on tonight. Can I tee of the PCV valve from either of the larger vacum lines coming off the carb??


Thanks
Mike

 

[yellow77]

Mike

DONT T into the brake vacuum line. I did once with nasty results.

Cheers

Richard

 

[BeaterShark]

Are you adding PCV thinking it might help bring down the oil consumption? IMHO, if anything, it will make it worse since now you are sucking out of your valve cover. Sure, if you baffle it right, it won't increase but it won't decrease either.

I'm guessing that the theory in doing this is that you have excessive crankcase pressure and by adding PCV it will be reduced due to better ring sealing? Remember that a "normal" PCV setup only works at idle or at part throttle since it's taken off of engine vacuum. If you have excessive crankcase pressure, it will be the worse at WOT and this PCV setup will do nothing to help.

I'm not saying that you shouldn't have a PCV setup (because you should), but if your current goal is to reduce your consumption, then I say focus your energy elsewhere. I also prefer to run breathers only (no PCV) while troubleshooting oil consumption as it elimates the PCV as a possible cause.

 

[waterboy1976]

Mike

DONT T into the brake vacuum line. I did once with nasty results.

Cheers

Richard

why not tee into the brake booster line....just wondering....Im learning as I go too.......

 

[JohnZ]

No need to tee into anything - there's a large nipple on the carburetor base for the PCV hose.

 

[samm]

hi im having same problem moroso valve covers.i tried putting on 2 new breathers (mr gasket) and took out the pcv going nowhere ! (i bought the car like this but am trying to rectify the problem) but after a day or 2 they get filled with oil and starts sprinkling around. how can i stop the messy squirting?

 

[TimAT]

Guys, a tee to the brake booster is a bad idea- the booster will NOT get the vacuum it needs to work properly- like none. A PCV valve is basically a controlled vacuum leak. And vacuum, like water and electricity, will follow the easiest path.

One rocker cover needs the PCV valve that's connected to the base of the carb, and the other cover needs a breather of some type. With baffles under each of them so oil can't get pulled directly into them. Some guys use breathers in both covers and say they work just fine, again, I'm going to assume they have baffles under them.

 

[samm]

I dont have baffles under the valve covers.

Could that be my Real problem? when i look through holes in valve covers,I see the lifters or valves. If that is my problem and i go buy baffles for both sides , do i need to empty engine oil before removing valve covers?