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Possible water contamination or...?

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jhg View Drop Down
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    Posted: 15 May 2023 at 11:33am
I am getting intermittent signs of water in the oil on the dipstick. When I have drained the oil there is zero signs of contamination.

I usually drive my jeep for about 45minutes to an hour at a time. Gets up to temp as expected.

Whatever signs of moisture will be minimal on the dipstick, around that washer-like centering tab brazed onto the stick. I check the stick often and do not always find moisture traces.

Oil level remains consistent. 

Is this condensation or do I need to jump into the bigger picture?

I will get a photo this afternoon.
1948 cj2a. Rebuilt L-head, steering, T90, WO 636, steering, brake lines. So far.
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Bruce W View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 12:21pm
  Probably just condensation. As you know, when that PCV hose was crimped, the PCV system was pretty much inoperable. Now that you’ve got the system working, it should clear up, but it may take a while. 
  Wet weather and running through water don’t help. 😁😉
BW 
It is NOT a Jeep Willys! It is a Willys jeep.

Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote jhg Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 12:32pm
I will keep an eye on it. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jhg Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 3:17pm
Here are pictures. This is the worst it has been but I had just made 4 water crossings 24" deep. Slow and easy but the fan still puts water up on the battery., oil filter canister and air filter. I checked the air filter and I do not think any was pulled through the element. There was a little white in the oil filter canister the rest is on the stick and in the stick tube.






Edited by jhg - 15 May 2023 at 3:18pm
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willyt View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote willyt Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 4:29pm
Looks like you need a snorkel. 😉
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rus Curtis Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 5:08pm
That's the same look on mine when I had no PCV and no gasket on that cap (but much worse).  Make it air-tight so the PCV can do its job and it will disappear.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jhg Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 5:32pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jhg Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 5:37pm

Crossing the creek at 2' water.

https://youtu.be/OxQJ_HQngbw
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ron D Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 5:43pm
Just a thought.
Is the bottom of the dipstick tube sealed where it press fits into the block?
I believe they can work loose over time.

Good luck!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote willyt Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 7:45pm
And a very good thought Ron. Especially with a negative pressure crankcase. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ron D Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 8:40pm
I didn't measure, but fording 2 feet of water might submerge that joint.
Nothing a good cleaning and some silicone caulk wouldn't fix.
Maybe a little pipe expanding tool action if need be.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee MN Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 11:42pm
Keep in mind, your submerging a hot engine in cold water, seals are made to keep oil in the engine, rapidly cooling it may pull water through the rear seal/front seal. I went through a creek years back in South Dakota and water ran through the Jeep doors, I too had water vapor much like in the topic of this tread.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote jhg Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2023 at 11:49pm
Interesting information. I think Ron hit on something, as my jeeps dipstick tube is, shall we say, less than secure. I will check the connection and seal it. I am also going to check the rest of the systems tubing for obstructions. I know the PCV valve works, but I never checked the tubes the system relies on.

But I think its water infiltration, as this has not been evident except when I am fording. 

Thanks to all who responded.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2023 at 12:26am
  Lee has a good point, and with the PCV inlet hose kinked off, air cannot enter the crankcase to replace what’s pulled out by the PCV valve action. This means low pressure (vacuum) in the crankcase so air and water will enter anywhere they can. 
  I have a Snap-On socket (don’t know the size offhand) that I drive into the lower end of the fill pipe to expand it to just the right size, a nice tight fit. Please repair it correctly - don’t gob it up with a bunch of silicone. 
BW 
It is NOT a Jeep Willys! It is a Willys jeep.

Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You!

We Have Miles to Jeep, Before We Sleep.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote dasvis Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2023 at 7:50am
Joe Deyoung offers his tool #11, oil filler tube mandrel, just for this.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote jhg Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2023 at 9:01am
Originally posted by Bruce W Bruce W wrote:

... Please repair it correctly - don’t gob it up with a bunch of silicone. 
BW 


10-4! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ron D Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2023 at 11:50am
Originally posted by Bruce W Bruce W wrote:

I have a Snap-On socket (don’t know the size offhand) that I drive into the lower end of the fill pipe to expand it to just the right size, a nice tight fit.
BW 


Name dropper.
Would a Craftsman socket work too? Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2023 at 12:01pm
  If it has the right outside diameter. And really, I’d rather hammer on a Craftsman if I had one. Wink
BW 

ETA: I use a Craftsman extension so I don’t have to hammer on my Snap-On tools. Big smile


Edited by Bruce W - 16 May 2023 at 12:03pm
It is NOT a Jeep Willys! It is a Willys jeep.

Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You!

We Have Miles to Jeep, Before We Sleep.
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