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PCV ?
Topic Started: Dec 15 2012, 10:52 PM (1,403 Views)
oldtime
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If the crankcase ventilation system is not correctly installed it could easily become an open system.
If the system is somehow open the engine crankcase could potentially suck in high atmosperic moisture.
Example : Do you hqave a hose going from the Donaldson into the oil fill tube ?
If the oil fill tube sucks in unfiltered air it could lead to moisture in the crankcase.
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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Duffer
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For my 2 cents worth, most pre 70's engines were atmospheric vented and I don't recall condensation as being a big problem. I have noted the same white condensate in the oil filler on a number of F heads, especially on the ones that only got driven short distances and never really operated for any length of time at thermostat temperature. Personally, I think you should just put some more miles on it. As long as the oil stays clear, I don't think it's a problem.
John, SW Montana

55 CJ 3B, transmake, fiberglass/aluminum tub/hood/fenders, 381 sbc, AGE M22W trans, "super" D18/Teralows & Warn OD, D44/ARB/Dutchman front & full float D44/Powrloc rear axles-4.10's, Holbrook springs, 4 wheel power discs, Saginaw PS, Warn 8274

68 CJ5, stock 225, T86AA, D18w/ Warn OD, D27A & stock D44 (heavy duty housing)-4.88's, 11" brakes, stock Ross box, Belleview 6000 (a close to stock vehicle, including the Whitco top)
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oldtime
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Quote:
 
For my 2 cents worth, most pre 70's engines were atmospheric vented

True but the intake flow is always filtered through oil mesh or something.
The jeep could potentailly suck in water dripping from the hood crack or cowl gutter.
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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Duffer
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oldtime,Dec 18 2012
10:30 AM
Quote:
 
For my 2 cents worth, most pre 70's engines were atmospheric vented

True but the intake flow is always filtered through oil mesh or something.
The jeep could potentailly suck in water dripping from the hood crack or cowl gutter.

True, but some of those F heads where I have seen the condensate were in FC 150's where you have a cab over the air cleaner (same one used in a 3B) where water inhalation is just about impossible unless you are fording deep water.
John, SW Montana

55 CJ 3B, transmake, fiberglass/aluminum tub/hood/fenders, 381 sbc, AGE M22W trans, "super" D18/Teralows & Warn OD, D44/ARB/Dutchman front & full float D44/Powrloc rear axles-4.10's, Holbrook springs, 4 wheel power discs, Saginaw PS, Warn 8274

68 CJ5, stock 225, T86AA, D18w/ Warn OD, D27A & stock D44 (heavy duty housing)-4.88's, 11" brakes, stock Ross box, Belleview 6000 (a close to stock vehicle, including the Whitco top)
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oldtime
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I fully agree Duffer that normally the engine should be about bone dry inside but these 3B's can potetially have a lot of water dripping from the body into the engine compartment.
Actually it seems more likely that his jeep has a head gasket leak that's allowing water into the crankcase.
It's hard to say without knowing more about where the jeeps been.

I recommend changing the oil and "keeping an eye" on the dipstick.
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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div4gold
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Duffer,Dec 18 2012
07:25 AM
For my 2 cents worth, most pre 70's engines were atmospheric vented and I don't recall condensation as being a big problem. I have noted the same white condensate in the oil filler on a number of F heads, especially on the ones that only got driven short distances and never really operated for any length of time at thermostat temperature. Personally, I think you should just put some more miles on it. As long as the oil stays clear, I don't think it's a problem.

There is a hose from the air filter to the oil fill tube. The oil cap feels like it is seating tight.
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now :) UPS & FEDEX will continue to profit :)
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div4gold
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oldtime,Dec 18 2012
07:30 AM
Quote:
 
For my 2 cents worth, most pre 70's engines were atmospheric vented

True but the intake flow is always filtered through oil mesh or something.
The jeep could potentailly suck in water dripping from the hood crack or cowl gutter.

That's the plan right now.
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now :) UPS & FEDEX will continue to profit :)
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div4gold
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div4gold,Dec 18 2012
10:42 AM
Duffer,Dec 18 2012
07:25 AM
For my 2 cents worth, most pre 70's engines were atmospheric vented and I don't recall condensation as being a big problem.  I have noted the same white condensate in the oil filler on a number of F heads, especially on the ones that only got driven short distances and never really operated for any length of time at thermostat temperature.  Personally, I think you should just put some more miles on it.  As long as the oil stays clear, I don't think it's a problem.

There is a hose from the air filter to the oil fill tube. The oil cap feels like it is seating tight.

The oil was recently changed by the PO, I don't know what kind of oil he used. The engine was overhauled about 6k miles ago and I haven't been losing any coolant . I think I'll just drive it and keep an eye on things . Thanks for the input.
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now :) UPS & FEDEX will continue to profit :)
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