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Pinto breather set-up
nick205 - 2/8/05 at 06:31 AM

I know this has been covered before, but extensive searching didn't find what I'm after...

Should I connect the vent valve (PCV) on the side of my Pinto back into the inlet manifold?

As I understand it this will draw any pressure out of the crank case, but will it not also suck oil through into the inlet as well - emissions?

Any advice appreciated guys

Nick

viatron - 2/8/05 at 06:51 AM

Dump the valave and replace with an alloy elbow, Burtons do them, route a pipe from the elbow to a catch tank.

Mac

Oh and dont forget to blank off the inlet on the manifold!!

[Edited on 2-8-2005 by viatron]

Fishface - 2/8/05 at 07:30 AM

ive vented the crankcase but have changed the oil filler cap to a non breathing one, do you think I should vent the cam cover as well?

mookaloid - 2/8/05 at 09:07 AM

quote:
Originally posted by nick205


Should I connect the vent valve (PCV) on the side of my Pinto back into the inlet manifold?

As I understand it this will draw any pressure out of the crank case, but will it not also suck oil through into the inlet as well - emissions?

Any advice appreciated guys

Nick


I don't see why you shouldn't connect your PCV valve to your inlet manifold as long as you are not using twin 40's or the like. The only reason you can't stick with the standard setup with 40's is that you cant just feed the breather into one cylinder only as it would unbalance the air into that cylinder. With a single carb the manifold feeds all the cylinders so it is not a problem.

You will end up with a less leaky motor if you use the original setup. The PCV valve is there to minimise oil being sucked up into the manifold. If this was a problem then why did Ford keep making it for donkeys years?

Hope that helps

Mark

mookaloid - 2/8/05 at 09:10 AM

quote:
Originally posted by Fishface
ive vented the crankcase but have changed the oil filler cap to a non breathing one, do you think I should vent the cam cover as well?


Depends on the rest of your set up, if you are using the PCV valve connected to the inlet manifold then you need a vented cap to allow air IN to the engine.

If you have vented the crank case into a breather tank then yes you need to vent the rocker cover too.

HTH

Mark

nick205 - 2/8/05 at 10:06 AM

Cheers guys,

I'm going to plumb it into the inlet manifold and see how it goes. I've used the standard oil filler cap, which breathes, so shouldn't get a problem with adverse pressure.

Nick

Fishface - 2/8/05 at 01:20 PM

When i was researching this topic about venting th crankcase I was lead to believe that you should not vent back into the inlet manifold (cant remember why) I know particularly if you are using a PCV vale. I had brought a nice stainless one as well. In the end i vented my carnkcase via the burton power elbow into a pipe and up to a k& N filter then to outside air. (as oppossed to a breather tank as it was cheaper).

I wonder though if you need to vent the cam cover if the breather goes stright to outside air.

I know people have suffered oil leaks and head gasket leaks because they had used the PCV valve instead of the stright through elbow piece.

Rob

mookaloid - 2/8/05 at 07:40 PM

quote:
Originally posted by Fishface
When i was researching this topic about venting th crankcase I was lead to believe that you should not vent back into the inlet manifold (cant remember why) I know particularly if you are using a PCV vale. I had brought a nice stainless one as well. In the end i vented my carnkcase via the burton power elbow into a pipe and up to a k& N filter then to outside air. (as oppossed to a breather tank as it was cheaper).

I wonder though if you need to vent the cam cover if the breather goes stright to outside air.

I know people have suffered oil leaks and head gasket leaks because they had used the PCV valve instead of the stright through elbow piece.

Rob


See my two posts above

Cheers

Mark

Fishface - 3/8/05 at 07:35 AM

Thanks

coovey - 3/8/05 at 07:14 PM

I have twin 40's so different to your setup but i was warned by a fellow builder that you can't have the PCV as they have been known to suck shut at high revs. So i have sawn the bottom off and let the guts drop out. Then fitted it back on the engine with a small filter on the end.

The engine has been to the tunners and had no problems (goes like a rocket!!!!)