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Username Post: Oil at PCV valve        (Topic#123504)
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
02-05-06 08:42 PM - Post#869414    

I had some oil dripping out of the connection between the PCV valve (coming from the valve cover) and the manifold. Took off the valve and a good deal of oil poured out. can't be normal, can it? what should I do about it?
[ insert witty comment here ]


 
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bowtieollie 
ChevyTalk Subject Matter Expert
Posts: 21126
bowtieollie
Loc: See the USA in your Chevr...
Reg: 12-06-99
Re: Oil at PCV valve
02-06-06 11:02 AM - Post#869415    
    In response to danam

HI Dan,

Stock valve cover?
If not - does it have a baffle in place?

You are correct - you should not see oil pouring out of the PCV valve.

Make sure there isn't a loop or valley in the hose - which may be allowing the oil to collect.

Make sure you have the correct PCV for the engine and verify that it is clean and functioning.
Bowtieollie
Chevytalk.com Moderator


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-06-06 11:21 AM - Post#869416    
    In response to bowtieollie

It looks to be a stock set up. It has Corvette valve covers (for some reason). I'm trying to understand the PCV system, I have a tube connecting the valve cover to the pcv valve then into the intake manifold. The oil filler tube has a filtered vent wich allows fresh air into the crank case. There's a lot of oil splashing around under the valve covers, what keeps all that oil from being sucked into the pcv valve and into the manifold?
[ insert witty comment here ]


 
doubleE 
Valued Contributor
Posts: 3786
doubleE
Loc: Eagan MN
Reg: 06-02-03
Re: Oil at PCV valve
02-06-06 01:23 PM - Post#869417    
    In response to danam

Quote:

There's a lot of oil splashing around under the valve covers, what keeps all that oil from being sucked into the pcv valve and into the manifold?


On the inside of the valve cover there should be a baffle (that Ollie mentioned)covereing the opening. This baffle should act as a seperator keeping the oil from being sucked up into the hose/PCV.

Is this a stock 63 engine or a later 350? The stock 63 V8s did not have holes in the valve covers. Air entered thru the oil filler cap/filter and drawn out at the rear (where the road draft tube was located on older motors) A hose went from there to the PCV and then to a vacuum source either on the carb base or on the intake manifold. The idea is to ventalate the inside so the oily vapors mixed with the impureities get sucked out of the crank case and into the combustion chambers via the carb/intake manifold and eventually out the tail pipe.

This is an important system to have in good working order because it keeps the internal engine from accumulating moisture and sludge.

After I bought my 62 and tore the engine down I was amazed at the amount of sludge I found inside the valve covers, lifter gallery, and even the oil pan. It diffinetly interfeared with the flow of oil getting back to the oil pan. The previous owner had installed a Edelbrock intake and valve covers with breathers on both sides. He plugged the old road draft opening... that was it...no PCV valve. This was like having the windows open on a hot day with no breeze! Ya got to have ventilation!

Eric
Proud owner of My Blue 62 Impala SS


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-06-06 01:26 PM - Post#869418    
    In response to doubleE

Thanks, I'll take a look under the cover. My '63 has a stock '64 sbc 327 (with vette valve covers )
[ insert witty comment here ]


 
accessoryfreak 
Senior Member
Posts: 219
accessoryfreak
Age: 38
Loc: Sur Califas
Reg: 03-22-05
Re: Oil at PCV valve
02-07-06 07:39 AM - Post#869419    
    In response to danam

Vette valve covers dont have any openings for a pcv valve to be connected to?!?! Since there arent suposed to be any holes to begin with I doubt there is a baffle there to stop the oil. I dont see the pcv though where is it located? I am using the old pics from my question about a/c on the passenger side manifold.

Rick


1964 Chevrolet Impala SS



 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-07-06 08:03 AM - Post#869420    
    In response to accessoryfreak

those are photos of my engine actually!
The valve cover vent is on the passenger side, you can't see it in the photo. It's obscured by the air filter snout. There's a hose from the valve cover to the intake manifold behind the carb. The pcv valve is inline with the hose.
[ insert witty comment here ]


 
bowtieollie 
ChevyTalk Subject Matter Expert
Posts: 21126
bowtieollie
Loc: See the USA in your Chevr...
Reg: 12-06-99
Re: Oil at PCV valve
02-07-06 10:05 AM - Post#869421    
    In response to danam

No baffle in a Corvette cover - as mentioned by the other member. There lies the issue......
Bowtieollie
Chevytalk.com Moderator


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-07-06 12:44 PM - Post#869422    
    In response to bowtieollie

I understand now. Let's say I was to purchase a new set of repro '64 gm valve covers. I don't see a place for the PVC valve. where does it go?
[ insert witty comment here ]


 
franklin 
Very Senior Member
Posts: 1690

Loc: Staunton, VA, USA
Reg: 01-04-01
Re: Oil at PCV valve
02-07-06 01:26 PM - Post#869423    
    In response to danam

It goes in a big hole that is beside and behind the distributor in the engine block. If you do a search for PVC valve or something like that, you might turn up some old posts where we talked about the different options you have.

P.S. If you have found your engine used some oil, it will use a lot less if you get this fixed.

 
TheCruiser 
Member
Posts: 86
TheCruiser
Loc: Whitehall, PA USA
Reg: 06-22-04
Re: Oil at PCV valve
02-07-06 02:34 PM - Post#869424    
    In response to danam

This might help you locate it, I had this picture saved from a post a while ago. I circled in green the PCV valve area
1963 Impala 2DR Hardtop
V8 283
4BBL Edelbrock Carb(1403)
Column Shift 3 Speed
Hedman Long Tube Headers
Dual 2.25" Flowmaster 40 Series


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-07-06 02:57 PM - Post#869425    
    In response to TheCruiser

That's great, Thanks mate!
[ insert witty comment here ]


 
raycow 
Honored Member
Posts: 18480

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
Re: Oil at PCV valve
02-08-06 09:11 PM - Post#869426    
    In response to danam

Danam, do you know the history of your engine? It looks like someone has done some parts swapping on it or that it may not be a 63 engine to begin with. For one, you have staggered bolt valve covers. That type of head was last used in 59. I don't believe that hose connection from the oil filler to the air cleaner is stock, at least not on a 63. Your alternator is the internally regulated type which was first used in the 70s. Lastly, you have a right side exhaust manifold with an apparently unneeded mounting pad (like the one for the alternator on the left side).

I am thinking that maybe this engine did not originally have PCV and that it was added at some later time. Can you look at the rear of the engine behind the intake manifold and see what is in the hole where the road draft tube would have been attached?

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-08-06 10:01 PM - Post#869427    
    In response to raycow

I've decoded the block numbers, it's a '64 327, not original. The alternator and manifolds ar not original either (I've since replaced them). At the rear of the motor there is a huge empty hole where the PCV should go , similar to the one shown in the last picture above.
[ insert witty comment here ]


 
raycow 
Honored Member
Posts: 18480

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
Re: Oil at PCV valve
02-09-06 11:13 AM - Post#869428    
    In response to danam

Quote:

At the rear of the motor there is a huge empty hole where the PCV should go , similar to the one shown in the last picture above.



That's good news. I was afraid you might not have it. This means you can put a grommet and PCV valve in that hole, plug the valve cover, and see the end of your oil sucking problems.

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-09-06 11:35 AM - Post#869429    
    In response to raycow

I haven't been able to find the grommet or correct PCV valve. Any suggestions?
[ insert witty comment here ]


 
busdriver 
Contributor
Posts: 250

Loc: Madrid IA
Reg: 05-26-02
Re: Oil at PCV valve
02-09-06 12:28 PM - Post#869430    
    In response to danam

use a big block chevy valve cover gommet and a small block chevy pcv. its a real snug fit
1960 nomad


 
danam 
Frequent Contributor
Posts: 1368
danam
Loc: San Francisco, CA
Reg: 11-15-04
Re: Oil at PCV valve
02-10-06 09:31 AM - Post#869431    
    In response to busdriver

Okay, I found the parts. This opening has been uncovered for god knows how long... It's full of crap (like me ). I'm afraid if I start digging it out, some of it's going to end up in the crank case. Where does this opening go, & what's the best thing to do here?
[ insert witty comment here ]


 
mpris 
Contributor
Posts: 166

Loc: Concord, N. C. USA
Reg: 01-26-02
Re: Oil at PCV valve
02-10-06 09:48 AM - Post#869432    
    In response to danam

danam, I would try using a shop vac to get all that crap out. I am sure you could make some sort of adapter to attach to the vac in order to get to the hole.

Poocho

 
skipperman 
Senior Member
Posts: 367

Loc: New Jersey
Reg: 09-06-05
Re: Oil at PCV valve
02-10-06 10:01 AM - Post#869433    
    In response to mpris

Quote:

danam, I would try using a shop vac to get all that crap out. I am sure you could make some sort of adapter to attach to the vac in order to get to the hole.

Poocho




Poocho ... you're right man ...I was gonna suggest the SAME thing...hey ..and you got that DB thing right too....I did some homework on it ..... good man !

jersey skip

 
doubleE 
Valued Contributor
Posts: 3786
doubleE
Loc: Eagan MN
Reg: 06-02-03
Re: Oil at PCV valve
02-10-06 12:02 PM - Post#869434    
    In response to danam

Quote:

Where does this opening go, & what's the best thing to do here?


The other end of the hole makes a 90 degree turn and into the lifter valley (under the intake manifold). There should be a baffle that shaped like a can on its side attached to the opening. The baffle is there to prevent oil from being sucked out, just like the baffles on the valve covers on newer engines are suppose to do. This baffle is often missing. If yours is, look on ebay, I see them on there all the time.

As far as "the best thing to do".... I would pull the intake manifold and make sure the baffle is there. If its not you are going to sucking alot of oil out which will eventually end up in the combustion chambers. Might be a good idea to remove it and clean it out in some parts cleaner/solvent as they tend to accumulate gunk over time. While its off, you can clean the passageway from both ends. Reinstall the baffle and button up the engine, install your new plumbing and you should be good to go. Nothing like a clean engine inside and out

Eric

 
brookwood61 
Senior Member
Posts: 222

Loc: Ohio
Reg: 09-24-04
Re: Oil at PCV valve
02-10-06 12:32 PM - Post#869435    
    In response to danam

This may be a longshot, but if it was not being used, maybe it just has a grommet plug in it. The crud would build up on it.
Good Luck

 
doubleE 
Valued Contributor
Posts: 3786
doubleE
Loc: Eagan MN
Reg: 06-02-03
Re: Oil at PCV valve
02-11-06 06:14 AM - Post#869436    
    In response to doubleE

Saw this pic on ebay, shows the hole, minus the baffle inside the lifter gallery.

If this hole has been plugged and with as many other modifications this engine has, I really think you need to pull the intake to see if the baffle is there if you plan to use this orfice for the PCV system.

Proud owner of My Blue 62 Impala SS


 
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