Crank case vent
Thread Starter
Drifting
Joined: Feb 2013
Posts: 1,462
Likes: 48
Crank case vent
I am working on my 1985 4 plus 3. In the FSM on 6E3-139. Th e drivers side valve cover gets a PCV valve. The passenger side says filtered air. Is that another PCV. Or is there a special filter.
Thank you
Thank you
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
To much pressure - from eliminating the PCV - will over pressurize the crankcase and blowout your engine seals. To much vacuum - from isolating the clean air source - will pull dirty air in through the seals and ruin the seals also.
Hope this helps.
Safety Car
Joined: Sep 2004
Posts: 3,953
Likes: 550
From: Mission Viejo CA
I don't have a '85 FSM to look at but the crankcase needs a clean air source to make up for what the PCV system takes out. Usually this is a connection between the air cleaner and a throttle body.
To much pressure - from eliminating the PCV - will over pressurize the crankcase and blowout your engine seals. To much vacuum - from isolating the clean air source - will pull dirty air in through the seals and ruin the seals also.
To much pressure - from eliminating the PCV - will over pressurize the crankcase and blowout your engine seals. To much vacuum - from isolating the clean air source - will pull dirty air in through the seals and ruin the seals also.
