Engine/Transmission (1998.5 - 2002) Is this right?

[jeepit]

I usually change my oil after truck had been sitting over night but since it is cold out I took to run some errands and let it sit about an hour and went out to do the oil change. The drain plug seemed tight as I was turning on it and when it did come loose there was pressure behind. Needless to say it did make a little mess. i checked the puke bottle to see if it was plugged up but it was ok. Is this normal???

 

[NHays]

Not Normal

No, Having pressure in the crankcase with the engine off is not normal.

 

[mhenon]

Try warming the engine again and cracking the oil filler cap. If there's pressure there you have a plugged crankcase vent line. It's probably plugged upstream of the overflow bottle. Shouldn't be too hard to run down.

Mike