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Old 02-26-2013, 05:27 PM   #1
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Default Burning a quart a week..

I have a 92 xj 4x4 with a 4.0, the jeep runs great but I seem to lose about a quart of oil per week. I have no leaks. Any advice is appriciated.
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Old 02-26-2013, 05:38 PM   #2
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great seals with a bunch of Blow By. exhaust smoke much?
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Old 02-26-2013, 05:46 PM   #3
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My exhaust smokes sometimes but not bad at all...
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Old 02-26-2013, 05:54 PM   #4
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My exhaust smokes sometimes but not bad at all...
air filter full of oil?

When does it smoke? Idling? On take off?
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Old 02-26-2013, 05:59 PM   #5
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Air filter looks good and when it does smoke its usually on take off but it rarely dies it...
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Old 02-26-2013, 06:08 PM   #6
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great seals with a bunch of Blow By. exhaust smoke much?
What is blow by?...
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Old 02-26-2013, 06:12 PM   #7
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What is blow by?...
Blowby would be crankcase pressure and would have oiled up your air filter.

Your symptom is like leaky valve stem seals but they don't cause a large amount of oil consumption like you're claiming.
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Old 02-26-2013, 06:14 PM   #8
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What is blow by?...
Blow-by occurs when the explosion that occurs in your engine's combustion chamber causes fuel, air and moisture to be forced past the rings into the crankcase. Your engine's rings must maintain an excellent fit in order to contain the pressure.
The causes of blow-by: wear, soot and deposits

As rings and cylinder liners wear away they are less capable of maintaining this seal. Consequently as a car ages the amount of blow-by that occurs can increase.
Soot and deposits left over from incomplete combustion that collect on the rings can also inhibit their seal worsening blow-by.

But the easiest way to think about it is that it is "worn out"
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Old 02-26-2013, 06:17 PM   #9
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Blowby would be crankcase pressure and would have oiled up your air filter.

Your symptom is like leaky valve stem seals but they don't cause a large amount of oil consumption like you're claiming.
Not always in the oil filter. My last engine spit the oil out of the dip stick tube. Crank Case Pressure is correct but the pressure is going to get out the fastest way possible.
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Smittybilt 9.5k Gen 2, Electric Fan Conversion, WJ seats, 1/3rd doors, etc.

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Old 02-26-2013, 06:21 PM   #10
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Not always in the oil filter. My last engine spit the oil out of the dip stick tube. Crank Case Pressure is correct but the pressure is going to get out the fastest way possible.

I think you meant air filter.....LOL.
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Old 02-26-2013, 06:23 PM   #11
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Well I know she has some miles on her so should I just keep adding oil and drive her till she dies?...
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Old 02-26-2013, 06:24 PM   #12
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How many miles do you drive to use a quart of oil?
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Old 02-26-2013, 06:33 PM   #13
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Oil drain plug tight?
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Old 02-26-2013, 06:33 PM   #14
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300-350 miles
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Old 02-26-2013, 06:59 PM   #15
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Quote:
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300-350 miles
You're sure there's no leaks?

A leakdown test would determine where the oil is going. Valve stem seals are pretty easy to do right in the Jeep.
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In Handy Printable pdf format:
https://docs.google.com/file/d/0Bz4d...aEE/edit?pli=1

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Old 02-26-2013, 06:59 PM
 
 
 
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