Valve Stem seals
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
i took out a brand new rebuild in under 1000 miles due to that...
and the bitch is, its part of the valve cover, thus you have to replace the whole valve cover to replace the PCV valve.... $250 later......
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Jebby
Last edited by Jebbysan; May 24, 2022 at 04:38 PM.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
And in disbelief that you had to buy and replace the whole valve cover to replace the valve... what a **** design...
but i would still put money on the intake gaskets.. for the op's problem
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
I just went through this on a 2013 Equinox….where there is no PCV valve, just a controlled leak orifice….which is what the Ford has too…..
On the Equinox….the hole gets plugged….and the crankcase goes from a slight vacuum to pressure.
Was using a quart every 200 miles…..then I cleaned it and now a quart every 3000 miles……it is pretty amazing for sure.
This is another seriously misunderstood system on an engine…..
Jebby
Drifting
Joined: Oct 2020
Posts: 1,569
Likes: 579
From: Wisconsin
Actually the crankcase pressure renders the oil ring worthless and oil just pushes past the rings….
I just went through this on a 2013 Equinox….where there is no PCV valve, just a controlled leak orifice….which is what the Ford has too…..
On the Equinox….the hole gets plugged….and the crankcase goes from a slight vacuum to pressure.
Was using a quart every 200 miles…..then I cleaned it and now a quart every 3000 miles……it is pretty amazing for sure.
This is another seriously misunderstood system on an engine…..
Jebby
I just went through this on a 2013 Equinox….where there is no PCV valve, just a controlled leak orifice….which is what the Ford has too…..
On the Equinox….the hole gets plugged….and the crankcase goes from a slight vacuum to pressure.
Was using a quart every 200 miles…..then I cleaned it and now a quart every 3000 miles……it is pretty amazing for sure.
This is another seriously misunderstood system on an engine…..
Jebby
Tried catch cans but that was just a mess. Found out about the “controlled orifice” pcv, yep it was plugged. Cleaned it out one size bigger and all was right with the world again.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
Actually the crankcase pressure renders the oil ring worthless and oil just pushes past the rings….
I just went through this on a 2013 Equinox….where there is no PCV valve, just a controlled leak orifice….which is what the Ford has too…..
On the Equinox….the hole gets plugged….and the crankcase goes from a slight vacuum to pressure.
Was using a quart every 200 miles…..then I cleaned it and now a quart every 3000 miles……it is pretty amazing for sure.
This is another seriously misunderstood system on an engine…..
Jebby
I just went through this on a 2013 Equinox….where there is no PCV valve, just a controlled leak orifice….which is what the Ford has too…..
On the Equinox….the hole gets plugged….and the crankcase goes from a slight vacuum to pressure.
Was using a quart every 200 miles…..then I cleaned it and now a quart every 3000 miles……it is pretty amazing for sure.
This is another seriously misunderstood system on an engine…..
Jebby
Also had this on a GMC Acadia. It would keep blowing milky oil/ water mix up into the intake and fouling it, even to the point of freezing the throttle blade in winter and causing limp mode.
Tried catch cans but that was just a mess. Found out about the “controlled orifice” pcv, yep it was plugged. Cleaned it out one size bigger and all was right with the world again.
Tried catch cans but that was just a mess. Found out about the “controlled orifice” pcv, yep it was plugged. Cleaned it out one size bigger and all was right with the world again.
the op stated he has an oily film on the plenum inside the intake..
Thus it could be the PCV
but I’m still going with the intake gasket
i’ve seen this happen before personally if you even have one tiny leak in one of the runners in the oil valley the vacuum inside the intake manifold will pull that oil and disperse it through all of the cylinders and thus turning the spark plugs black so that leak does not have to be the whole bottom that leak does not have to be one side or the other it can be one little place
Team Owner
Joined: Mar 2002
Posts: 44,707
Likes: 1,837
From: Huntsville AL
Looks like Gasgacinch comes in a couple forms.
1) Gasgacinch 440-A Gasket Sealer and Belt Dressing, 4 oz , white
2) Edelbrock 9300 Gasgacinch Gasket Sealer - 4 oz
Is Permatex 80062 High Tack Gasket Sealant, 4 oz. , Black the same and the above products?
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Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Evidently, after watching a few YouTube vids there are a few people that install Intake Gaskets dry.
Then later, they wonder why they have a vacuum leak, fouled plugs, blue exhaust smoke.
Look for a red metal can. 9300 Inside the cap will be an applicator brush.
Nice & neat product made by a company that knows their way around Intake Manifolds, Edelbrock.
Then later, they wonder why they have a vacuum leak, fouled plugs, blue exhaust smoke.
Look for a red metal can. 9300 Inside the cap will be an applicator brush.
Nice & neat product made by a company that knows their way around Intake Manifolds, Edelbrock.
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
I have a set of procomp heads on my sbc that are doing very well. Except the fact that I have a lot of oil consumption. The bottom of the engine has been completely rebuilt so I think that the problem is from the valve stem seals. The question is: wich are good valve seals that I can buy?
Thank you.
Thank you.
I recommend you get a correctly sized set of viton seals. My seals fit over the tops of the cylinder head valve guide bosses. When/if you have the heads refreshed, be sure the viton seals are correct size. They can be too loose also.
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
The Procomp head I borrowed to make a video had bad guides, with not a lot of use but a common problem I've herd bout the old procomps.
I didn't read all the replies but another common sbc oil consumption problem is not sealing the rocker studs that go into the intake runners. I've also have a couple eddy intakes with bolt holes that were slightly drilled off and when tightened down caused the flange to distort enough to leak at the nearby intake ports. Still I like to use gasket SEALER not RTV
I didn't read all the replies but another common sbc oil consumption problem is not sealing the rocker studs that go into the intake runners. I've also have a couple eddy intakes with bolt holes that were slightly drilled off and when tightened down caused the flange to distort enough to leak at the nearby intake ports. Still I like to use gasket SEALER not RTV