Another PCV question
Thread Starter
Pro
Joined: Mar 2001
Posts: 573
Likes: 6
From: Gold Coast Queensland Australia
Another PCV question
Hi Guys,
I,ve been watching this subject and have now set up my system.
My question is do I need to have baffle plates under the PCV and relief valves?
The valve covers that I am using had the knock outs but no baffles under them. They do have small bosses that I imagine are for mounting the baffles.
How critical are they and what are the possible problems associated with not having them.
Thanks, Mark.
I,ve been watching this subject and have now set up my system.
My question is do I need to have baffle plates under the PCV and relief valves?
The valve covers that I am using had the knock outs but no baffles under them. They do have small bosses that I imagine are for mounting the baffles.
How critical are they and what are the possible problems associated with not having them.
Thanks, Mark.
Race Director
Joined: May 2000
Posts: 12,712
Likes: 2,270
Re: Another PCV question (59er)
Generally you need some sort of "liquid-vapor" separators at the valve cover connections to keep the engine from ingesting oil through the PCV system. It's most critical on the downstream side - valve cover outlet to PCV valve to carburetor port. Take off the lines and check the valve. Do they have evidence of liquid oil in them?
Duke
Duke
Pro
Joined: Feb 1999
Posts: 735
Likes: 174
From: Myrtle Beach South Carolina
Re: Another PCV question (59er)
If you run it without the baffles I would be concerned with the PCV system sucking in oil and fouling your PCV valve. If the valve covers have accomodations for them I would fab up some sheet metal and screw them into place. Don't forget to put a little red loctite on the screws.
Guest
Posts: n/a
Re: Another PCV question (Kid_Again)
...order moroso pn 97340, baffled valve cover grommets, coupla' bucks
thanks johnZ :seeya
thanks johnZ :seeya
The positive simply uses a PCV valve to extrace crankcase ventallation. The air is replaced through a vented oil cap.
The closed positive system replace the vented oil cap with a connection to the air cleaner.
Either are WAY better then none. Thanks to the folks here for the recent help.
David.
Thread Starter
Pro
Joined: Mar 2001
Posts: 573
Likes: 6
From: Gold Coast Queensland Australia
Re: Another PCV question (59er)
Thanks guys,
I haven't run the motor yet to see if the oil would be a problem and before the rebuild it had the pcv in a grommet in a vented cap so I doubt that it worked as I would imagine that it would just short cycle and it used to dump to the ground.
I will check out the baffled grommets or at the least fabricate the baffles in the valve covers.
Thanks again for the input, Mark.
I haven't run the motor yet to see if the oil would be a problem and before the rebuild it had the pcv in a grommet in a vented cap so I doubt that it worked as I would imagine that it would just short cycle and it used to dump to the ground.
I will check out the baffled grommets or at the least fabricate the baffles in the valve covers.
Thanks again for the input, Mark.
