jeep loosing oil fast

[devilbikerdude]

ok so i just drove home from phoenix back to here in salt lake, and i occasioanly checked my oil level and after about every 200 miles i had to add a quart of oil. i run 10w30 royal purple syn currently. also it was running over regular temp almost the whole trip, i had the heater on full blast and all the windows down cuz it was about 100F, IT SUCKED but i was assuming the very near overheating had alot do to with the oil loss, i stopped off at rest stops frequently and let the engine cool down in the shade. what else might cause this oil loss?

 

[Kiel]

ok so i just drove home from phoenix back to here in salt lake, and i occasioanly checked my oil level and after about every 200 miles i had to add a quart of oil. i run 10w30 royal purple syn currently. also it was running over regular temp almost the whole trip, i had the heater on full blast and all the windows down cuz it was about 100F, IT SUCKED but i was assuming the very near overheating had alot do to with the oil loss, i stopped off at rest stops frequently and let the engine cool down in the shade. what else might cause this oil loss?

Leak or no leak?
Compression test?

 

[devilbikerdude]

it didnt leak when i lived in az for two months but since i just got back home it started to leak oil on the driveway, and i have not done a compression test.

 

[rollover]

Sometimes syn/oil will cause oil leaks. It moves much easier and seeps thru the gaskets mostly on older cork type, newer rubber gaskets are made for today's syn/oils.
But it sounds as though your problem is more like a water system or compression prob. How long has it been since you had your radiator rodded or your thermostat replaced? Also ditto on the compression test. You can run a quart low and still not overheat.

 

[devilbikerdude]

well for as long i have had it i havent rodded the radiator but i have re-flushed it frequently. for the compression test i havent done that yet, would i be able to go any regular shop for that? or could i do myself with a special tool or something, thanks

 

[DaveB]

The most common leak areas are the valve cover gasket, oil pan gasket and the rear main seal. I've also seen the O-rings on the oil filter mount leak badly. Try to find where the leak is coming from by cleaning the engine up then watching carefully while it runs to see if you can pinpoint the source. The service guys will often add a dye to the oil that shows up with a black light so they can see where the leaks are coming from. On my son's jeep (87) his motor was having major leaking problems which left an oil slick on my driveway. What I found was that he was getting too much blow by which caused excessive internal pressure which forced oil out of every seal and gasket. I swapped out the CCV that jeep used for a PCV and the leaks have stopped. On your overheating issue, make sure that you don't have any large air pockets in the cooling system. If the coolant is up and there are no air pockets take a sample of your coolant to a radiator shop and have it analyzed for exhaust contamination. If you have a head gasket leak that allows exhaust gas into the coolant it will cause overheating. The coolant test will show if the exhaust gasses are getting into the coolant.

 

[Brett]

What I found was that he was getting too much blow by which caused excessive internal pressure which forced oil out of every seal and gasket. I swapped out the CCV that jeep used for a PCV and the leaks have stopped.

Side bar......what parts did you change over to? I've got a bit of blow by as well.

 

[91MJ97TJ]

Air filter clean

The most common leak areas are the valve cover gasket, oil pan gasket and the rear main seal. I've also seen the O-rings on the oil filter mount leak badly. Try to find where the leak is coming from by cleaning the engine up then watching carefully while it runs to see if you can pinpoint the source. The service guys will often add a dye to the oil that shows up with a black light so they can see where the leaks are coming from. On my son's jeep (87) his motor was having major leaking problems which left an oil slick on my driveway. What I found was that he was getting too much blow by which caused excessive internal pressure which forced oil out of every seal and gasket. I swapped out the CCV that jeep used for a PCV and the leaks have stopped. On your overheating issue, make sure that you don't have any large air pockets in the cooling system. If the coolant is up and there are no air pockets take a sample of your coolant to a radiator shop and have it analyzed for exhaust contamination. If you have a head gasket leak that allows exhaust gas into the coolant it will cause overheating. The coolant test will show if the exhaust gasses are getting into the coolant.

X2


You are getting blow-by check to see if you air filter is clean at all.

 

[DaveB]

Side bar......what parts did you change over to? I've got a bit of blow by as well.

I used a PCV valve and valve cover grommet from an 85 cj7 with a 6 cylinder motor, two feet of 3/8 fuel hose, and a new manifold 3/8 nipple. The CCV (constant crankcase ventilation) is the rubber valve and plastic pipe on the rear of the valve cover. It gets plugged up easily and on high mileage motors can't keep up. Take the CCV and hose out and replace it with the PCV valve and hose. The manifold nipple needs to be larger for the larger diameter hose.

 

[Brett]

I used a PCV valve and valve cover grommet from an 85 cj7 with a 6 cylinder motor, two feet of 3/8 fuel hose, and a new manifold 3/8 nipple. The CCV (constant crankcase ventilation) is the rubber valve and plastic pipe on the rear of the valve cover. It gets plugged up easily and on high mileage motors can't keep up. Take the CCV and hose out and replace it with the PCV valve and hose. The manifold nipple needs to be larger for the larger diameter hose.

I think that I shall do this. The breather on the front of the valve cover likes to spit a lot of oil out of it and if this will help, good! Thanks Dave

 

[waynehartwig]

Running a motor that long, and basically on the verge of overheating, can cause the rings to collapse. If that happens, your oil will basically go right out the exhaust. This will show up on a compression test.