PCV valve routing

Reply Subscribe

Thread Tools

Search this Thread

Jan 19, 2019 | 04:26 PM

DirtyLarry

Thread Starter

Senior User

Joined: Nov 2014

Posts: 331

Likes: 0

PCV valve routing

My 400’s got a 4 barrel edelbrock (1406?) and a older weiand intake on it. My pcv valve coming out of my drivers side valve cover runs to a T. The T goes to the 3/8 port on the front of my carb, the brake booster, and the afformentioned pcv valve. The pass side pcv valve runs to a 1/2 maybe port on the underside of my air breather.

Should my booster be T’d to the valve? What I’d like to do is run the drivers side valve to another plug on the carb to get away from the booster and have a cleaner look. what do you guys think of my setup? Should I use “catch cans”? Is the pass side okay to be going into the breather?

Trucks runs and stops good. I’ve taken it a LONG way in the last years fixing leaks and little mess ups left by previous owners. But it doesn’t run a good as I think and I just want to make sure I don’t have something crossed. No inspections in my state but if it’s not going to hurt the truck I might as well feed the pcv back into I think. The hoses are always super clean inside.

Jan 19, 2019 | 05:41 PM

niko20

More Turbo

Joined: Feb 2018

Posts: 710

Likes: 3

From: Oregon

What the heck? The PCV should not be Teed. It should go directly to the Carb. The brake booster and everything else should come off the manifold somewhere else. In fact I believe Edlebrock has a port on the back for the brake booster unless I'm mistaken.

You definitely don't want PCV fumes/carbon/oil having the ability to go into any other hoses....

I found this posting:
https://www.hotrodders.com/forum/ede...ns-187239.html

That someone mentions Teeing off the PCV for the brake booster.

I think that's just weird. Why not use the connection in the back of the carb

Jan 19, 2019 | 05:50 PM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 785

From: Simi Valley, CA

Upper pic: 1977/79 F100/350 351M/400 with original 2V carb/manifold.

Jan 19, 2019 | 07:34 PM

DirtyLarry

Thread Starter

Senior User

Joined: Nov 2014

Posts: 331

Likes: 0

I got this truck when I was 17 and could barely change oil. We have both come a long way!!

this is how it came to me from the po. I looked into it in the past and couldn’t really find a definite answer. Now, it has worked perfectly! Trucks got good brakes. Maybe they’ll be better. It does have a plug on the back of the carb believe. Think that’s the one? Then route my pcv to the plug I’m using on the front currently or get a cab for it? Should my pass side be going into the breather?

Jan 19, 2019 | 07:48 PM

somethingclever

Cargo Master

Joined: Dec 2008

Posts: 3,213

Likes: 321

From: SW PA

Nothing wrong with how it’s setup.

The pass side can have a push in breather or connect to the air cleaner. It should be a hose only with no pcv valve.

Jan 19, 2019 | 09:09 PM

mark-guiver

Mountain Pass

Joined: Oct 2017

Posts: 213

Likes: 6

From: Maysville, Ky

The port in the rear of the 1406 is for the brake booster hose to plug into. The port in front is for your PCV hose. Like was mentioned above the PCV valve can go on either side with a vented breather or a hose to the air filter housing.
Mark.

Jan 19, 2019 | 10:30 PM

440 sixpack

Lead Driver

Joined: Oct 2018

Posts: 7,871

Likes: 2,360

your brakes are best to have their own line with nothing else dedicated on it.

Someone put a PCV in your breather hose for some reason so lose it.

There are only 2 sources of vacuum on an engine, ported and manifold. ported is for the vac advance on post smog era engines and manifold is for everything else. it makes no difference whatsoever where you take manifold vacuum it's all the same.