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Blow by of oil out of breather #61553
05/22/08 11:38 AM
05/22/08 11:38 AM
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mopars4ever Offline OP
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I am experiencing small amounts of oil coming out of the breather on the valve cover of my 360. I assume it is from blow by. It only happens when I run the car real hard. The pcv is new and works. No other oil leaks. Can I run a hose to the right side header pipe and weld on a one way valve? I don`t like the mess of cleaning off the engine oil after a long drive. Mike

Re: Blow by of oil out of breather [Re: mopars4ever] #61554
05/22/08 11:45 AM
05/22/08 11:45 AM
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Maybe I should have posted this in the Raceonly section. Mike

Re: Blow by of oil out of breather [Re: mopars4ever] #61555
05/22/08 12:00 PM
05/22/08 12:00 PM
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Grand Prairie,Texas
stumpy Offline
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Is there a baffle under the breather hole?

Re: Blow by of oil out of breather [Re: mopars4ever] #61556
05/22/08 12:02 PM
05/22/08 12:02 PM
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Snowing in the north!
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Do a search on PCV valve. I was having issues a week or so ago and someone responded with a Mr Gasket I think tech page on old style evacuation. Might do the trick for you.

Re: Blow by of oil out of breather [Re: mopars4ever] #61557
05/22/08 12:14 PM
05/22/08 12:14 PM
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Left Coast
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If you are using a street type exhaust you will end up pressuring your crankcase instead of evacuation it. The evacs were designed for open headers where the exhaust gas exits rapidly and causes a slight vacuum. Mufflers/exhaust pipes interupt this process. Sounds to me like you have a ring seal problem that needs to be addressed. -Bob

Re: Blow by of oil out of breather [Re: mopars4ever] #61558
05/22/08 12:38 PM
05/22/08 12:38 PM
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North Riverside IL & Lowell IN
GTXKen Offline
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I agree with Bob that you may have a ring seal problem, If thats the case it will only get worse. I had the same problem last summer.


Ken

Re: Blow by of oil out of breather [Re: mopars4ever] #61559
05/22/08 08:40 PM
05/22/08 08:40 PM
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Kentucky
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I have friend with a very solid 383 with minimal miles that started doing that. He hasn't looked into it yet. I just wonder if there is a problem with rings seating in rebuilt engines that sit a lot? There also has to be an influence from high compression pistons as well.


‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring
‘14 Big Horn, Quad Cab, 4x4, 1500
Re: Blow by of oil out of breather [Re: dfsmopars] #61560
05/22/08 10:13 PM
05/22/08 10:13 PM
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Maryland
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anything unusual out the tailpipes???

My 340 GTS blew a head gasket up into the lifter valley once years ago. Blew smoke out one tail pipe (no H pipe), and puffed smoke out the oil fill/breather like a locomotive (puff puff puff)as well. Engine was fine, just the blown head gasket (no coolant leaks in this case).


Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph
Re: Blow by of oil out of breather [Re: GO_Fish] #61561
05/23/08 01:47 AM
05/23/08 01:47 AM
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No nothing out the tail pipes. Mike

Re: Blow by of oil out of breather [Re: mopars4ever] #61562
05/23/08 01:50 AM
05/23/08 01:50 AM
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Quote:


If you are using a street type exhaust you will end up pressuring your crankcase instead of evacuation it


Would it work with a one way diverter type valve? I have 3 inch exhaust and turndowns before the axles. Would that make any difference in getting it to work? Mike

Re: Blow by of oil out of breather [Re: mopars4ever] #61563
05/23/08 01:52 AM
05/23/08 01:52 AM
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Quote:

I agree with Bob that you may have a ring seal problem, If thats the case it will only get worse. I had the same problem last summer.



I`m sure there is a ring seal problem but I like to use the car some this summer before the rebuild. Mike

Re: Blow by of oil out of breather [Re: mopars4ever] #61564
05/23/08 03:43 AM
05/23/08 03:43 AM
Joined: Jan 2003
Posts: 1,367
Jersey shore
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I don't run pcv on my 66, just two breathers. I just beat on it a bit Sunday,excuse the pollen dust, if it's not real bad you can try a wristband around the breather when you race/beat on it till you tear it down..Pretty cheap and they catch the oil mist fairly well...

4445918-ll.jpg (61 downloads)
Re: Blow by of oil out of breather [Re: mopars4ever] #61565
05/23/08 09:25 AM
05/23/08 09:25 AM
Joined: Apr 2003
Posts: 3,968
North Riverside IL & Lowell IN
GTXKen Offline
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Quote:

Quote:

I agree with Bob that you may have a ring seal problem, If thats the case it will only get worse. I had the same problem last summer.



I`m sure there is a ring seal problem but I like to use the car some this summer before the rebuild. Mike




Use some old socks to wrao the breathers when you leave the house and enjoy the summer, when winter comes tear it down. Thats the route I took.







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