pcv valve
Thread Starter
|
New User
Joined: Apr 2005
Posts: 9
Likes: 0
pcv valve
just wondering, do you need a pcv valve? I have a 390 with edelbrock performer rpm manifold. Right now all i have is k&n breathers but there seems to be quite a bit of smoke comming out i dont know if this is normal or not. Is it possible to do damage without a pcv valve? Thanks.
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
The PCV is used for emmissions purposes, as well as to prevent sludge buidlup. The fumes that come out of the motor are quite harmful to the enviroement, not that it matters. And yes the white smoke type stuff that comes out is normal.
Elder User
Joined: Apr 2005
Posts: 509
Likes: 0
From: UTI student
Not to high jack the thread but after reading this I went out and checked my breathers. I have the same thing. My question is this: If I leave the breathers on and they get clogged up with oil will it cause problems? Could it force the smoke or whatever to come out else where? I just found small amounts of oil shooting past the dipstick handle and squirting on the motor. Could this be related? The amount of oil and when it comes out is in relation to RPM's.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
You're getting blowby. The proper way to set up a PCV system is to have two breathers, one on each valve cover. One is run to the air cleaner, and the other has the PCV valve plugged into it. Then, the PCV valve is run to the PCV port on the carb, usually around the base.
Engine vacuum pulls the PCV valve open, and the breather on the other valve cover creates a cross flow through the engine. The combusion gasses are burned, and sent out the exhaust.
Now that you know what you need, go convert it. It's not hard.
Engine vacuum pulls the PCV valve open, and the breather on the other valve cover creates a cross flow through the engine. The combusion gasses are burned, and sent out the exhaust.
Now that you know what you need, go convert it. It's not hard.
Elder User
Joined: Apr 2005
Posts: 509
Likes: 0
From: UTI student
I run a 3310 carb and the vacuum port on the back runs the brake booster. The front lower port works the tranny vacuum line. Can I run the PCV off the other vacuum port or do I need to put a T-line off one of the other vacuum ports?
Trending Topics
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Elder User
Joined: Apr 2005
Posts: 509
Likes: 0
From: UTI student
I run the Performer RPM so I'm sure it does. I couldn't get the old Vacuum Tee off the back of the old intake so I just used plugs on the RPM and ran off the carb ports. I didn't have a PCV so I didn't worry about hooking the Tee fitting back up. It sounds dumb now that I think about it. Figures there is a reason Ford did it like that to start with.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Hook a PCV valve up to the PCV port on the carb if you want your engine to live. Remember, just because a PCV valve rattles does not mean it is good. They wear out fairly rapidly. Replace them annually or 12K miles.
Thread
Thread Starter
Forum
Replies
Last Post