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Auto/Truck/Other Transportation If you use it to get from here to there, this is the place to talk about it and how to fix it.

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  #1  
Old 07-29-2018, 01:53 AM
sethwyo sethwyo is offline
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Default Water in crankcase

Inline 6 motor in vehicle. Noticed over last few thousand miles oil wusnt getting low. Recently realized it was getting higher.

Anyway water can be getting into block other than cracked block ?

Drained about 2 and 1/2 gallons out.
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Old 07-29-2018, 10:20 AM
Tinker Tinker is offline
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Is it water infiltration? Water makes a yellowish emulsion like a milkshake, almost instantly. Motor would not last thousands of miles, probably not even fifty miles without bearings grinding to a halt, loss of power and major stuff breaking off inside.

May I assume that what you drained off still looks like oil? Does it have a fuel smell? Mechanical fuel pumps can leak fuel directly into the crankcase.

As far as your question, a head gasket could easily let water / coolant into the crankcase, intake manifold gasket on a V-8, (but you claim it is a 6, inline) the motor would have been running roughly if so.

But again, just a cup or two of water in the oil of a running engine would make a thick milkshake you could see on the dipstick, certainly not something that could be confused with the oil's normal appearance.

Keep us posted!
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Old 07-29-2018, 06:03 PM
sethwyo sethwyo is offline
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Its an odd one. At least to me.

Kept checking oil over last several months and several thousand miles. It wusnt getting low. Took one 4 day 1600 mile trip and figured it would need a quart but dip stick said no.

Low coolant light came on. I put in half gallon of anti freez. Month later came on again and i put in rest of jug. It does drip a bit from bottom of radiator so i didnt suspect.

Did not see any yello or white color on dipstik or in 2 1/2 gallons i drained out. Have set the milk jugs with the liquid to see if it seperates into water on bottom oil on top. Since yesterday it has not. Its a 2000 model so has electeic fuel pump. Power is and has been good. Fuel milage is good~ it has a digital scale of instant mpg . gets 25 on hwy.
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Old 07-30-2018, 10:16 AM
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This is truly weird... Wix has an oil analysis kit available at auto parts stores, around 20-25 bucks, may be worth it for the peace of mind.
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Old 07-30-2018, 01:07 PM
sethwyo sethwyo is offline
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It was a good engine. 2 1/2 gallons & at least 1 1/2 wore Not oil and it didnt fall apart. If was gasoline or water it sure had to cut down the lub on bearings. I put new oil in her and drove around about 20 miles.
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Old 07-30-2018, 10:12 PM
Lurch Male Lurch is offline
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X2 on the oil analysis. That extra liquid came from somewhere. The test would pinpoint that.
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Old 09-07-2018, 07:57 PM
Mad_Professor Mad_Professor is offline
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Start out with a pressure test of cooling system. See if it looses psi and if coolant goes down. Would indicate bad gaskets (head/intake) or cracked casting (intake/head/block). Unless you find a puddle under car.

Also look in radiator cap filler when motor running, fines bubbles indicate head gasket or cracked block/head.

Is coolant clean or any oil?

I can't see 2 1/2 gallons "extra" being in crankcase and the car even running? Coolant in oil will make a milky emulsion.

Pull off PCV valve, is it full of milky emulsion? E.g. water/coolant from the oil.

P.S. what is car/engine?
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Old 09-10-2018, 03:25 PM
sethwyo sethwyo is offline
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Its a jeep. Inline 6cyl. 4.0

It was 2 1/2 gallons tottal drained out.
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Old 09-11-2018, 02:09 AM
hunter88 hunter88 is offline
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This probably won't help, but when you said Jeep it made me think.

Many years ago I had a Jeep with engine problems. Back then I was told the aluminum block allowed anti freeze to get in the oil. I'm not sure how that could be, and I didn't ask for a more detailed answer back then.
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Old 09-12-2018, 01:49 AM
StockdaleDave Male StockdaleDave is offline
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What year 4.0? Several years were prone to head gasket failure between cylinders that would create coolant in the crankcase.
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Old 09-13-2018, 07:41 PM
sethwyo sethwyo is offline
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It was Diesel fuel in the crankcase. Not water.
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