View Full Version : replacing PCV valve?

09-28-2006, 12:04 PM
the manual says to replace the PCV valve? how often does it need to be replaced? and how do you do it?

east tx skier
09-28-2006, 12:07 PM
I replaced mine this year and it was probably the first time it has been replaced. Every couple of years (whenever you do a tune up) ought to be plenty. I was told (by "tommcat") to stick with motorcraft for the Ford engines. You just pull the old one out and stick the new one in there and attach the hose (at least that's all I did). Hope I didn't miss anything.

09-28-2006, 05:42 PM
can you tell a difference running Easty?
also, what plugs and gap?

east tx skier
09-28-2006, 05:44 PM
You and I are running different plugs, but the gap should be the same (0.035). Can't tell the difference after the new PCV valve. Maybe it wasn't the original afterall.

I believe on your engine, you want Autolite 25 (or comparable). I run Autolite 764, but mine is the 351HO.

09-28-2006, 06:01 PM
thanks Easty

east tx skier
09-28-2006, 10:59 PM
No sweat. Hope it helps.

09-29-2006, 09:01 PM
anyone, have a how to on replacing the PCV ?

east tx skier
09-29-2006, 09:38 PM
1. Take hold of PCV valve (rear of the starboard side valve cover).
2. Pull.
3. Take hold of rubber hose attached to PCV valve.
4. Pull
5. Attach hose to new PCV valve.
6. Push new PCV valve into hole on valve cover.

/That's from memory, but as I recall, that's all there is to it really.

09-29-2006, 10:10 PM
yeah it's easy. remove and replace, Eastie is right on. My wife could do it.

88 PS190
09-30-2006, 12:37 AM
I guess the only thing missing is to note that you have two valve covers, and the starboard side one has the pcv valve. And it has a tube running up to it, then it sits in a grommit into the valve cover. It just kinda sits there doesn't take much to pull it out, maybe 2 pounds of pull..

Kinda silly, its not even worth thinking about because its so easy to do once you see the part...

If you have any doubts buy the new one and look at it for 2 seconds then eyeball the valve cover...

BAM its in.

10-03-2006, 01:00 PM
what do I tell the autoparts store about the PCV? what year do I tell them the motor is?

10-03-2006, 05:25 PM
bump, going to the autoparts store soon. so, bump.

thanks guys

east tx skier
10-03-2006, 05:27 PM
Tell them you want a Motorcraft # EV-68 2F16 with a right angle elbow on it.

10-03-2006, 05:30 PM
thanks again Easty

dont know where I would be with out you!

east tx skier
10-03-2006, 05:34 PM
No problem. By the way, according to Tommcat, who is a Ford Tech, the motorcraft PCV is more application specific with the aftermarket PCV valves being designed for a wider vvariety of applications. He wasn't sure that it would matter in a marine application, but mentioned it. It was cheap enough that I replaced the NAPA PCV I'd originally put in.

I've got a list of part numbers for the 351, including that one in the FAQ thread. Good luck.

10-03-2006, 06:28 PM
okay, bought everything i need.
8 plugs
5 qt. Rotella T 15W40 motor oil
3 qt. Dextron III (Powerslot tranny)
PCV (89 351W) didnt have the number you gave easty, but I think that would work

10-03-2006, 07:36 PM
What are the symptoms of a faulty PCV valve? Since PCV stands for Positive Crankcase Ventilation (I think), then it applies vacuum to the crankcase, removing any fumes or oil mist, etc. It dumps that back into the top of the carb, right? So, if it's plugged, what happens?


10-03-2006, 07:39 PM
damn good question M-Funf !

10-03-2006, 08:44 PM
"So, if it's plugged, what happens?"

Blown oil seals.
Bill Z

east tx skier
10-03-2006, 10:01 PM
okay, bought everything i need.
8 plugs
5 qt. Rotella T 15W40 motor oil
3 qt. Dextron III (Powerslot tranny)
PCV (89 351W) didnt have the number you gave easty, but I think that would work

I just bought that part earlier this year (took the part number directly from the part). What brand did you end up getting. There's also a NAPA part number in the FAQ thread.

As far as what happens when it gets plugged, I think that's one of those things I don't ever want to learn first hand. :)

10-04-2006, 08:50 AM
autozone brand. starts with a "D" and the name looks german

east tx skier
10-04-2006, 10:24 AM
I ran the NAPA part for a week or so with no issues whatsoever. The thing about the motorcraft part is just something I'm repeating that was mentioned to me by a Ford Tech who is a member on this forum. The valve I replaced was also a motorcraft part FWIW. My guess is you'll probably be fine with whatever you got.

10-04-2006, 01:37 PM
the little valve on the old pcv still seems to be working okay. you can tip the valve and see the "ball" of whatever in there move up and down?