The Ford Barn

AL in NY · 03-06-2012, 10:18 AM

I'm thinking of installing a PCV valve to control oil mist exiting the oil filler tube and coating my firewall. I plan on mounting it in the upper rear corner of the valve chamber cover and routing it to the intake manifold. My question is, should a close off the oil filler tube so as to obtain a negative pressure inside the crankcase??

Greg way out West · 03-06-2012, 11:01 AM

Hi Al,

Leave the filler tube open. You want fresh air coming in to replace what the PCV sucks from the crankcase..

Greg out west,,

Russ/40 · 03-06-2012, 11:02 AM

If you close off the filler tube, how will fresh air enter the crankcase? You need to have an in and an out.

Greg, you type faster than I do

1931 flamingo · 03-06-2012, 11:58 AM

Al in NY: After you do it could you post pictures and p/n's of what you used. Thanks.
Paul in CT

Jim Brierley · 03-06-2012, 12:02 PM

Fast typing or not, you both got it right!

CarlG · 03-06-2012, 12:22 PM

Sponsored Links (Register now to hide all advertisements)

I would be very interested in which PCV valve to use, and where and how it's mounted to the valve cover. I have a Weber carb that already has a PCV port on it.

AL in NY · 03-06-2012, 02:31 PM

CarlG, I ordered one from eBay (item #360361033158) which includes the rubber grommet. I am going to install it in the upper rear corner of the valve chamber cover using the rubber grommet. It's probably going to be a 1" or greater hole in the valve cover.

V4F · 03-06-2012, 02:40 PM

i put one in my filler tube & ran into the bottom of my air filter . seems fine ... steve

MALAK · 03-06-2012, 03:43 PM

You might want to check out this thread. There's some good info and questions to think about if considering adding a PCV.
https://www.fordbarn.com/forum/showthread.php?p=155411

RonC · 03-06-2012, 03:48 PM

Your rings must be tired. Why not just add an accessory breather tube?

http://www.brattons.com/product.asp?...istory=related

AL in NY · 03-06-2012, 07:47 PM

Thanks MALAK, I did a Ford Barn search on PCV's, but didn't find that thread by MIKEK, very informative

Bruce Newbery · 03-07-2012, 10:53 PM

I had excessive blow- by and had rings shipped in a white box.They were grant rings.The blow-by was really bad. I put a rubber glove over the filler pipe and it blew uo like a balloon at idle.I noticed that the paper with the rings said printed in U.S.A but did not say where the rings were made. I had 2000 miles on these rings and when I took the engine apart I found they were completly worn out. The contact on the face of the ring was right to the maximum. I also measured the cylinders before I put these rings in and it was exact specs. I bought Hastings rings. Made in U.S.A. and have had no blow-by and the rubber glove just flutters at 1000 R.P.M. This is a real good test to see if your blow-by is excessive. The moral of the story is buy only made in U.S.A. parts .

03-06-2012, 10:18 AM	#1
AL in NY Senior Member Join Date: May 2010 Location: Southern Upstate New York Posts: 1,209	PCV Valve Question I'm thinking of installing a PCV valve to control oil mist exiting the oil filler tube and coating my firewall. I plan on mounting it in the upper rear corner of the valve chamber cover and routing it to the intake manifold. My question is, should a close off the oil filler tube so as to obtain a negative pressure inside the crankcase?? __________________ AL in NY

03-06-2012, 11:01 AM	#2
Greg way out West Member Join Date: Aug 2010 Location: So Cal Posts: 75	Re: PCV Valve Question Hi Al, Leave the filler tube open. You want fresh air coming in to replace what the PCV sucks from the crankcase.. Greg out west,,

03-06-2012, 11:58 AM	#4
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,428	Re: PCV Valve Question Al in NY: After you do it could you post pictures and p/n's of what you used. Thanks. Paul in CT

03-06-2012, 12:02 PM	#5
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,251	Re: PCV Valve Question Fast typing or not, you both got it right!

03-06-2012, 12:22 PM	#6
CarlG Senior Member Join Date: Nov 2010 Location: Anchorage, Alaska Posts: 9,192	Re: PCV Valve Question Sponsored Links (Register now to hide all advertisements) I would be very interested in which PCV valve to use, and where and how it's mounted to the valve cover. I have a Weber carb that already has a PCV port on it.

03-06-2012, 11:02 AM	#3
Russ/40 Senior Member Join Date: May 2010 Location: Santee, California Posts: 3,505	Re: PCV Valve Question If you close off the filler tube, how will fresh air enter the crankcase? You need to have an in and an out. Greg, you type faster than I do

03-06-2012, 02:31 PM	#7
AL in NY Senior Member Join Date: May 2010 Location: Southern Upstate New York Posts: 1,209	Re: PCV Valve Question CarlG, I ordered one from eBay (item #360361033158) which includes the rubber grommet. I am going to install it in the upper rear corner of the valve chamber cover using the rubber grommet. It's probably going to be a 1" or greater hole in the valve cover. __________________ AL in NY

03-06-2012, 02:40 PM	#8
V4F Senior Member Join Date: May 2010 Location: ca. Posts: 2,524	Re: PCV Valve Question i put one in my filler tube & ran into the bottom of my air filter . seems fine ... steve __________________ V4f

03-06-2012, 03:43 PM	#9
MALAK Senior Member Join Date: Jun 2010 Location: Highland, CA Posts: 207	Re: PCV Valve Question You might want to check out this thread. There's some good info and questions to think about if considering adding a PCV. https://www.fordbarn.com/forum/showthread.php?p=155411

03-06-2012, 03:48 PM	#10
RonC Senior Member Join Date: May 2010 Location: Rhode Island Posts: 1,868	Re: PCV Valve Question Your rings must be tired. Why not just add an accessory breather tube? http://www.brattons.com/product.asp?...istory=related

03-06-2012, 07:47 PM	#11
AL in NY Senior Member Join Date: May 2010 Location: Southern Upstate New York Posts: 1,209	Re: PCV Valve Question Thanks MALAK, I did a Ford Barn search on PCV's, but didn't find that thread by MIKEK, very informative __________________ AL in NY

03-07-2012, 10:53 PM	#12
Bruce Newbery Member Join Date: May 2010 Location: Williams Lake B.C. Canada Posts: 52	Re: PCV Valve Question I had excessive blow- by and had rings shipped in a white box.They were grant rings.The blow-by was really bad. I put a rubber glove over the filler pipe and it blew uo like a balloon at idle.I noticed that the paper with the rings said printed in U.S.A but did not say where the rings were made. I had 2000 miles on these rings and when I took the engine apart I found they were completly worn out. The contact on the face of the ring was right to the maximum. I also measured the cylinders before I put these rings in and it was exact specs. I bought Hastings rings. Made in U.S.A. and have had no blow-by and the rubber glove just flutters at 1000 R.P.M. This is a real good test to see if your blow-by is excessive. The moral of the story is buy only made in U.S.A. parts .