Just bought an FSJ & there's water in the oil

[Longmoor]

After all this fun I decided to take <will e>'s suggestion and join in on the fun. All these jeeps for parts and a shop to boot I took it upon myself to buy another FJS. This one I drove home. Its an 85 wagoneer 360, body is in excelent condition. The jeep runs great, no blue or white smoke. Here is the catch. For 500 bucks theres got to be a problem. When I went to pick up the jeep I went over all the basics before driving it away. The oil in the crackcase I had to change because of its creamy white color. I am no auto mechanic but that means water mixed with oil. I have a spare engine here at the worst. The new oil change has water in it now too. No more than 3 hours on the new oil. Cooling system dosen't hold water either. No white or blue smoke from the engine. Does the 360 have a common or known problem where water can get into the oil from a failed seal or gasket? or is it worse?
There is a copy of this post on general FSJ tech as well.

[ December 26, 2003, 04:14 PM: Message edited by: Mark Desaulniers ]

[Alzamon]

Sounds like the head gasket is leaking to me. I just had to replace one of mine but luckily the water was shooting outside the motor.

[Longmoor]

I have a parts jeep almost complete
1JCNE15N7BT######
1- U.S.
J- Jeep Corporation
C- MPV ( Multi Purpose Vehicle)
N- V8-360
E- Auto-Column Shift-Part Time/4WD
15- Wagoneer-4 Door Station Wagon-109" Wheelbase
N- 5975-6200
B- 1981
T- Toledo

I am thinking this is a good parts match for the one I just bought.
1JCNE15N6FT######
1- U.S.
J- Jeep Corporation
C- MPV ( Multi Purpose Vehicle)
N- V8-360
E- Auto-Column Shift-Part Time/4WD
15- Wagoneer-4 Door Station Wagon-109" Wheelbase
N- 5975-6200
F- 1985
T- Toledo

Opinions ? :confused:

[Merc69]

Sounds like a parts rig to me. Enjoy the fun.

[woodybeone]

More than likely a head gasket but could be worse(hopefully not). The motor will have to be torn down a little to check it out so you should check the condition of the rest of the motor(cylinders, heads, etc..) and consider rebuilding if needed.

[WHAT?]

I second the motion on the Head gasket.

just a reminder that FSJs in '85-'86 were switching from amc to chrysler :mad: same block but some wiring and vacuum differences. Easiest way to tell is the gauge cluster. the amc has three main "circles" and the crysler looks like "crap" :D

Sorry, I am VERY anti-crysler!!!

[ December 27, 2003, 03:49 AM: Message edited by: Poor Boy ]

[woodybeone]

Find a shop that does "Leakdown Testing" not "Compression Testing" or you can do it yourself. This test will check the rings, valves, and head gasket.
To do it yourself you will need an air compressor and a leakdown guage(has two guages on it ,one to measure the input air and the other to measure the air lost in the cylinder). Take off the air cleaner, oil cap, and radiator cap. Get the cylinder up with both valves closed , attach the guage and put about 60-80 pounds of air in(keep the input the same for each cylinder).
Look for bubbles in the radiator (blown head gasket around that cylinder).
Listen for air leaking:
Through Carb (intake valve is leaking).
Through Exhaust Pipe(exhaust valve is leaking).
Through OilInlet Tube(rings are leaking).
Test the next cylinder and so on.
Each should "leak" the same amount of air and should be within a 25% loss from the input air reading.

If you don't want to spring for a leakdown guage and just look for a blown head gasket you could just hook up an air source @ 60lbs to each cylinder with the valves closed and look for bubbles in the coolant.

[Longmoor]

I have a portable air supply I made from a 20lb propane tank. it has guages on it. I'll make up a braided hose with 14mm spark plug end on it, pop the valve covers and check one cylinder at a time.I will look for bubbles in the rad. Either way I am thinking the top end has to come apart.

smile.gif I have given some thought to pulling the engine from the parts jeep.It was running good and low miles on it, set it on an engine stand to do gaskets cleanup and inspection and drop it into the road jeep. That way I can rebuild the other one and leave it on the stand for a spare.

[kyjman]

Just a thought here....could it be the timing cover gasket leaking water into the oil????
I had that happen one time on a 318 V-8. I'm not sure how the AMC 360 is set up, but its a thought.