P c v

[Barry Wolk]

Looking under my car is not a pleasant thing because of the trail of oil expelled from the draft tube. Has anyone given any consideration to a rudimentary PCV system?

Correct me if I'm wrong in my thinking. If close off the vent in the valley pan the bypass gasses will only come out the draft pipe, correct? It would seem that blocking the draft pipe would force all the fumes out the filler pipe. I see a simple adapter with an in-line PCV valve hooked to a factory 90° installed in the bottom of the air cleaner, where it wouldn't be seen. Sounds very reversible if necessary.

Is there a better way?

[Mad Scientist]

How about just clamping an old sock on the draft tube to catch the oil before it has a chance to get blown around?

[Shawn Newcomb]

Rich, I think I saw someone do that to a transmission in another application once. Maybe it was a roundy-round race car?

[Shelly Harris]

How about just clamping an old sock on the draft tube to catch the oil before it has a chance to get blown around?

Great idea. Then your car changes socks once a year?

[Barry Wolk]

That doesn't solve the problem at all. Once the sock gets saturated it will drip and get sprayed back on the undercarriage, plus, it'll mess up my nice tile floor.:mad:

[depmike38]

Barry, How about using the vent to connect to the PCV in the breather and just blocking off the vent pipe altogether. This would let all of the plumbing be hidden and maintain a stock appearance.

[Barry Wolk]

Do you mean the breather in the valley pan?

[depmike38]

What I was thinking was that you could use the valley pan vent as the PCV relief to the breather or in thinking further since that last post could a carb spacer like the ones on later Fords with the port for the PCV be used and not cut the breather.

[Barry Wolk]

OK here a basic PCV system.

http://beesandgoats.com/boostfaq/stock_pcv.jpg

I envision a cap with a PCV valve built into it. From Summit Racing $3.75

http://static.summitracing.com/global/images/prod/large/mrg-2063_w.jpg

A 2 foot piece of hose and an EGR type spacer like my 460 has.

http://www.concatoracing.com/Parts%20For%20Sale/Small%20Parts/Edelbrock%208053%20EGR%20Plate.JPG

Connect the two and I think the problem is solved.

I think it's that simple because the engine vacuum will overcome the suction created by the draft tube and drag the crankcase gasses back into the fuel stream instead of all over the lovely bottom-side of my car. That way the draft tube stays open at idle, when the PCV valve is closed.

Will that work? It's totally reversible.

[depmike38]

I like that as it means not altering the valley pan either. I believe, if I remember correctly, that it would be the same arrangement that Ford used on their earlier emissions systems. I'll look tomorrow morning as the old truck I have has it's original style PCV system. It would be much cleaner than going into the breather(besides having to cut a hole) because it would negate having that old foam mesh breather filter they used to have.

[Chuck Lutz]

I understand the diagram completely but let me ask this... The PVC valve is basically a one-way check valve opened by the pressure within the system going one way?

[Barry Wolk]

Not pressure, vacuum from the inlet at the carb adapter, I think. At idle an open valve would screw up the air/fuel mixture, it's such a delicate balance. At speed though, bypass gasses would be sucked into the air/fuel stream, no?

[Don Henschel]

Not pressure, vacuum from the inlet at the carb adapter, I think. At idle an open valve would screw up the air/fuel mixture, it's such a delicate balance. At speed though, bypass gasses would be sucked into the air/fuel stream, no?

You wont notice it. You might have to tweak your idle screws on the carb. As for the vent on your valley cover there is no room there. I cant get my fingers between the intake and the top of the cap! Now as for that cap, take it off and look into it. You will notice strands or fibers in there. When you change your oil you should clean this in solvent and soak the fibers with oil. This is your fresh air in filter so the fumes can be pushed out with fresh air in from your engine fan and pushed out through the draft tube. When your on the highway the wind rushing past your vent tube draws out even more fumes. Other than making a hole in your valley cover in the back (beside your distributor) and putting in a PCV valve there the only other place I can think of for now would be the vent tube. Mad had one of these filler vent tube assemblies and you could save yours and modify this one. Either that or figure out some sort of an elbow adapter on the end and sneak a hose along the side of your pan by the generator and up to your intake. Barry? oil dripping on the floor? Do you have a blowby problem or excessive blowby?

[Barry Wolk]

I don't think it's excessive, I'm just anal about my tile floor.:D

[Don Henschel]

Got no drops from mine from the breather, but you drive yours alot more than I do. I'm quite anal about my concrete:D so if there is aything dripping I throw a peice of cardboard under mine;)

[Barry Wolk]

My floor's too pretty to cover with cardboard.:D

[Don Henschel]

My floor's too pretty to cover with cardboard.:D

"How about just clamping an old sock on the draft tube to catch the oil before it has a chance to get blown around?
__________________
C56B2127
Rich Gideon Schaumburg, Il."
Problem solved!;)

[Barry Wolk]

Eventually it will saturate and continue to drip. Also, once saturated it will probably cause back-pressure causing oil vapors to come out the valley vent.

New problem.

[Don Henschel]

Eventually it will saturate and continue to drip. Also, once saturated it will probably cause back-pressure causing oil vapors to come out the valley vent.

New problem.

Great idea. Then your car changes socks once a year?

Another problem solved:D:D

[Chuck Lutz]

You guys keep it up and we'll have people putting Fruit of the Loom briefs on leaking differentials!

[Barry Wolk]

That Depends.

[Don Henschel]

You guys keep it up and we'll have people putting Fruit of the Loom briefs on leaking differentials!

http://www.us.depend.com/incontinence-products/
for old leaky cars and people:p

[Barry Wolk]

Great minds think alike.

[Barry Wolk]

This has possibilities.

http://www.hotrodchrome.com/carbaccess/1067.jpg

[Barry Wolk]

Hey, somebody stole our idea!!!!!!!!

http://www.markiiforum.com/attachment.php?attachmentid=695&d=1268006009

[Don Henschel]

Just to find a location for your PCV valve. I thought about the valley cover-a hole with a gromet, but realized if oil is splashing around under there (which it probably is) you would need a baffle or shield otherwise you would suck oil into the engine and start using oil. This probably wouldnt be the best place either because of the fresh air vent so close. Who else has oil dripping out. Maybe your vent pipe has plugged oil drain holes not allowing oil to drain back?? I will see if the shop manual has a cutaway diagragm of how it works and try to figure it out.

[Don Henschel]

A quote from the manual.
"Any oil carried by the ventilating air is trapped in the cannister of the oil filler and the road draft tube and drains gack into the camshaft sprocket chamber"
I would think there should be a separator baffle with small drain holes. If not remove the assembly from your engine and maybe place some very course steel wool like a coarse pot scrubber in the inlet tube giong to the front engine cover to catch the oil and allow it to drip back down. Maybe drain holes in this cannister are plugged with sludge. Components like this I like to get hot tanked when I rebuild engines to make sure they arnt blocked up with grunge.

[Don Henschel]

Hey, somebody stole our idea!!!!!!!!



I hope they blocked the vent pipe. My God that car needs some TLC.
That AC hose sure could use some relocation too! That location needed a bit more thought!

[Barry Wolk]

Correct me if I'm wrong. Is a PCV valve designed to be sucked open by vacuum, or pushed open by blow-by gasses build up in the crankcase?

If you didn't leave the draft tube open then oily fumes would come out the valley pan vent.

I think the vent tube should stay open for times of idle. I think the vacuum will overcome the suction created by the angled vent tube at speed and recycle the gasses.

Kind of a semi-closed system, but effective at speed.

BTW, I've never owned an old car that wasn't oily because of its draft tube.

[Chuck Lutz]

All the cars I've had with PCV valve in the rocker cover I assumed were opened by suction away from the rocker cover. I remember checking them by pushing up on the spring from underneath to make sure they were working. Could be wrong.

[Don Henschel]

They are sucked open by vacuum. I would block the draft tube so fresh air isnt sucked up through it bypassing the engine.
To clarify block off just the draft tube hanging below the oil pan. The vacuum through the PCV valve would pull the fumes through that contraption on the filler cap.
I think I would rather have oil drip on my tiles than have a creation like that on my engine as shown in your photo of that tired mark:rolleyes:

[depmike38]

:confused:Is it a trick of the photo or has the manifold damper at the rear of the passenger side manifold been replaced with a spacer? (57 only maybe) It doesn't seem to have the wheel or springs.

[Don Henschel]

Probably a spacer. I have seen lots of the heat risers turfed out over the years.

[Barry Wolk]

turfed out


What does that mean?

[Don Henschel]

What does that mean?
http://dictionary.reverso.net/english-synonyms/turf%20out :rolleyes:

[Barry Wolk]

That's the other English.

[Chuck Lutz]

"banish, bounce (slang) cast out, chuck out"

TIME OUT!!!