gardia55
1951 studebaker pickup , 340 mopar
why so ?
340 motor pumping excess oil on right side
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Because you wouldn't have to bend the piece upwards. it would just bottom out into the resr wall of the cover.
512Stroker
We are all here because we are not all there.
Don't be embarrassed I don't think that is the OP problem.
My 340 has a rearward mounted breather on the passenger side which is directly connected to the air cleaner, I have no oiling issues.
Keep looking
its not 100% the location. its the ebay valve covers and baffle design.
My pcv is on the right side (sitting in the car), or on the left if you're facing the motor from the front. Orientation perspective of left and right is usually from the drivers seat. Hence right front fender, left front fender.
Gator
Mopar or No Car
Being curious why on the left side? I have my PCV on the right side for years and have Zero problems....
yellow rose
Overnight Sensation
Are you saying the valve cover let's oil stack up (for lack of a better term) along the rail by the number 8 cylinder??
I'm out of ideas, one thing for sure I just need to log in Fabo to review problems I haven't encountered. lol
It’s probably got some worn intake valves or valve guides on that head.
Plug everything off, except a breather cap on right, and restrict the pcv hose with a wire nut for home electrical use, open side towards carb, drill a 1/16” or 1/8” hole in the wire nut. If it still fouls the plugs, pull the heads.
Plug everything off, except a breather cap on right, and restrict the pcv hose with a wire nut for home electrical use, open side towards carb, drill a 1/16” or 1/8” hole in the wire nut. If it still fouls the plugs, pull the heads.
Yes, the valve cover mounting flange is thick, and the valve cover wall is on the exterior of the flanges. So it can collect there, as well as that area of the head. AND the breather baffle isn't the best design. The angled ends don't block much at all.
Also...Look at the breather and PCV location on OE covers. It's in the middle. Simply by inertia, it's not going to get NEARLY as much oil slop there vs the rear of the head.
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Years ago I read an article written by a Chrysler engineer that detailed the emissions systems plumbing and the reasons why. I don't remember the reasons now, but every Chrysler factory photo shows the pcv plumbed to the left side valve cover.
right side
Oil accumulated at the top end of a LA small block is pretty Normal, especially with a Hv oil pump. That’s why many racers will restrict it will a tapped plug, and a smaller hole drilled in it.
Usually I’ve found it to not be a problem.
Excessive vacuum seems to be a by product of more modern cam profiles, and in conjunction with an oily top end and loose valve guides is a recipe for fouled plugs.
I recently went through the right side head of an engine I built, but didn’t put the heads together, constantly fouling the back two cylinders 6 and 8
I was in denial about the heads, and pulled the engine to inspect after 3,000 miles.
Put it back together new file fit rings, Cometic head gaskets, upped the compression a little, same thing maybe worse.
This time tore the heads apart to find the guides all loose, and pc seals couldn’t deal with it.
The point is, it pulled oil more heavily down the right side, and only fouled the two rear most plugs.
I bought a pro form valve spring removal tool, and double check my cylinder head guy, as he did it again on some W2s I just wrapped up, only to redo the valve job he just did and put new guides in after picking them up. I had to fire him.
Usually I’ve found it to not be a problem.
Excessive vacuum seems to be a by product of more modern cam profiles, and in conjunction with an oily top end and loose valve guides is a recipe for fouled plugs.
I recently went through the right side head of an engine I built, but didn’t put the heads together, constantly fouling the back two cylinders 6 and 8
I was in denial about the heads, and pulled the engine to inspect after 3,000 miles.
Put it back together new file fit rings, Cometic head gaskets, upped the compression a little, same thing maybe worse.
This time tore the heads apart to find the guides all loose, and pc seals couldn’t deal with it.
The point is, it pulled oil more heavily down the right side, and only fouled the two rear most plugs.
I bought a pro form valve spring removal tool, and double check my cylinder head guy, as he did it again on some W2s I just wrapped up, only to redo the valve job he just did and put new guides in after picking them up. I had to fire him.
512Stroker
We are all here because we are not all there.
passenger side, rule of thumb is, while seated in drivers seat. If you needed a right side front fender, or right side rear quarter panel, you'd certainly want to keep that in mind.
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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I have an HV pump on my Eddy-headed 360, and I increased the oiling to my heads to help the unbushed aluminum Mopar rockers survive, and to provide extra cooling to the springs. I can't say it was required, only that I thought it was a good idea.
Well if you look at those heads when installed, you can see where all the oil pools, and especially at the back. I got out my die-grinder and dug a channel back there to help the low side oil climb over to the high side and then drop into the valley. My heads are now side-specific,lol, and I no longer have a PCV problem. Your results may vary.
While the engine was apart, I noticed that junk was accumulating in the pockets,between the lifter bores in the valley. Well I had the bright idea to drill holes in all those pockets and let the oil escape downwards; which I then did, and chamferred them from the top, only. Well; I got an earful from a buncha guys that this would just add to windage and cost me horsepower. If it did, I sure can't tell; it still spins the tires to past the speed limit anywhere in Manitoba,lol. And I don't see junk in those pockets no more.
To the OP
If your guides are passing oil, it will accumulate on the backs of the valves. If you pull the intake it should be obvious. The intakes will be dripping and the exhaust will be baked on hard. I guess you could see this with an endoscope, and not have to pull the intake.
If your intake manifold is coked up black towards the plenum, you probably got the wrong cam for your driving style. That blackchit is a physical sign of reversion, and/or possibly a restricted exhaust. There is nothing wrong with reversion, as all performance cams have some. But that blackchit is carbon and it's hard and the molecules have sharp corners. They won't do your rings any good when they break off, and they can contribute to pre-ignition if they break off at the wrong time. To ease the formation of it,you just have to change your driving style by keeping the engine at a slightly higher rpm, for more of the time.
If you don't see any of that blackchit you got a wiener cam, you need more overlap,lol.
Well if you look at those heads when installed, you can see where all the oil pools, and especially at the back. I got out my die-grinder and dug a channel back there to help the low side oil climb over to the high side and then drop into the valley. My heads are now side-specific,lol, and I no longer have a PCV problem. Your results may vary.
While the engine was apart, I noticed that junk was accumulating in the pockets,between the lifter bores in the valley. Well I had the bright idea to drill holes in all those pockets and let the oil escape downwards; which I then did, and chamferred them from the top, only. Well; I got an earful from a buncha guys that this would just add to windage and cost me horsepower. If it did, I sure can't tell; it still spins the tires to past the speed limit anywhere in Manitoba,lol. And I don't see junk in those pockets no more.
To the OP
If your guides are passing oil, it will accumulate on the backs of the valves. If you pull the intake it should be obvious. The intakes will be dripping and the exhaust will be baked on hard. I guess you could see this with an endoscope, and not have to pull the intake.
If your intake manifold is coked up black towards the plenum, you probably got the wrong cam for your driving style. That blackchit is a physical sign of reversion, and/or possibly a restricted exhaust. There is nothing wrong with reversion, as all performance cams have some. But that blackchit is carbon and it's hard and the molecules have sharp corners. They won't do your rings any good when they break off, and they can contribute to pre-ignition if they break off at the wrong time. To ease the formation of it,you just have to change your driving style by keeping the engine at a slightly higher rpm, for more of the time.
If you don't see any of that blackchit you got a wiener cam, you need more overlap,lol.
gardia55
1951 studebaker pickup , 340 mopar
after 45 years in automotive repair I maintain the rt is passenger ,left is driver side basically standard shop theory ,
gardia55
1951 studebaker pickup , 340 mopar
I have come to the conclusion to swap my aftermarket covers for oem stock or very close to that design ( mopar performance alloy finned )and run a breather with a drop tube on rt side ,stock vc has center mount ports well baffled inside to help stop vacuum pick up of oil being sloshed about I had a hv pump swapped back to standard v and running a chrysler purple cam not sure of the lift , bought the motor already built
Let's go back to the basics here. It sounds like you made multiiple changes on the motor & the oiling problem arose. I would take it back to where you started by putting all of the original parts back on it. From there, make one change at a time & see when the oiling problem begins. I had it drilled into my head from my first hot rod, "Make one change at a time & see what happens."
gardia55
1951 studebaker pickup , 340 mopar
I wish it was that easy , I sold all my other parts to a buddy who has now moved far away so my plan is to keep it driveable and maybe look for a LD340 intake and a smaller carb like 650-670 ?I believe it has to be the intake swap , thnx
512Stroker
We are all here because we are not all there.
I would ditch the valve covers first.
Perhaps find a stock pair of covers with the factory PVC and breather arrangement.
Hell put a Wanted To Buy ad in the forum classifieds, some one on here should be able to help ya out.
gardia55
1951 studebaker pickup , 340 mopar
found a nice pair in my area thnx
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