Sorry this is my first post but I haven't read anything yet that I'd be able to help anyone with. My Jeep is a 99 2 Door, 5 Speed Sport.

Got a question/story for ya'll if you've got time to add some insight.

I know Jeeps notoriously have low oil pressure readings but mine has always said about 40, never gone lower than 35 or so.

I got mine stuck yesterday.

When I got pulled out yesterday, after being in that mudhole below, my oil pressure was showing zero and the check guages light was on but the Jeep was running fine. We could rev it and the pressure would go to normal. I figured the sending unit or wiring was wet or something.

Drove the Jeep out of there probably about a half mile. Ran fine. Started it and drove it on the trailer to get it home, took it off trailer, put it back on trailer, took it back off trailer, drove it into the driveway and it ran perfectly normal besides the wierd guage reading.

When we got home today I went to start it and it ran perfect for a second and cut off. I tried cranking it and it acted like the starter couldnt move the engine, like slow motion, or the flywheel was just spinning or something. After 45 seconds or so I got it started and it was running rough as hell, and then it blew about 5 quarts of oil on the ground from the oil filter. The filter was loose so I figured Pro Lube ****ed up and left it like that. I tightened it, added oil, and started it again. Same problem getting it started, then it when it did start it ran terrible and then blew the oil out again.

I figured the gasket was bad so I went and got new oil and a new filter and tried again. It started perfect and then a second later it went to running like **** again. I cut it off. Pulled all the plugs and found some crap in there, almost like mud but it may have just been gas and sludge. Two ground straps were bent on the plugs making it seem like it tried compressing water though the air filter and air box are bone dry and clean. Sprayed WD40 in the spark plug holes and let it dry out for about an hour. Fixed the plug gaps, re-installed and tried starting it. It was hard as hell to start and then ran like **** again. When I touched the gas it cut off. Let it idle for abit and then it cleared up and ran normal except now the oil guage is reading 80PSI

Any idea what in the hell is going on?

 

Full of water?

 

Sounds like you spun the main bearing and now the passage is blocked by the bearing and boosting your oil pressure. The relief valve is located in the oil filter so the restriction is definitely lower crank related because your blowing your filter off.

 

x2^ an engine will run fine with little/no oil pressure right up until it don't...you could be sol on the one..

 

x3 i believe u r SOL

 

What would be the cause of this? The bent ground straps on the spark plugs, rough running and hard starts are all coincidence?

 

Runs fine now, actually smoother than before, no sounds, just a lot of oil pressure and slow cranking.

 

the mashed up plugs are probably from swallowing water/mud....you may have spun the bearings and had them sit back in place..the bearings have knoches in them to keep them in place when a bearing spins it will drive the bearing tight against the crank (causing the slow cranking) and can spin back in place and stop......all it will take is one bearing to build pressure the rest might be allowing oil up to the top end.....like i said old saying goes:they run best right before they blow up

 

LOL. I have never heard that saying. So if this is the case, putting a mechanical guage in the head should show little oil pressure, no?

 

Same thing happened with me before after mudding, had a blocked oil passage and the relief valve in the oil oil pump went bad so I was seeing over 80psi and blowing up oil filters. Changed the oil pump and flushed the oil system. Still ran over 60psi but stopped blowing off filters.

Had valve train noise at start up and at higher rpm's. But ran like that for another year till I sold the jeep.

 

Same thing happened with me before after mudding, had a blocked oil passage and the relief valve in the oil oil pump went bad so I was seeing over 80psi and blowing up oil filters. Changed the oil pump and flushed the oil system. Still ran over 60psi but stopped blowing off filters.

Had valve train noise at start up and at higher rpm's. But ran like that for another year till I sold the jeep.

 

Thanks for the info. Why do you think you had noise afterwards? There was still a blockage in there somewhere?

Did you ever figure out how the mud got in there?

 

Sunday Bump

 

that is a interesting ordeal you got going on. I've seen a few starters crap out from getting mud in them causing them to make funky grunting noises and crank slowly. But the whole blowing off oil filters is a new one for me,... hope you figure it out!

 

Yeah ... I don't know if it's all coincidence or what. Working on it today and will update.

Has anyone ever seen high oil pressure from spun bearings? Everything I can find says low oil pressure is typical.