tweaks

i have a 91 cherokee i checked my filter the other day and had oil on my filter and inside the box and noticed steam coming out of the dip stick nc 1 know what that could be

Abovetimberline

it is blowby,caused by worn piston rings. I would do a compression check and see how your motor is doing,compression should be between 120-150lbs.

tweaks

but wouldnt it smoke if the rings were bad i know nothing bout working on cars im too impatient and have friends that love working on them but it runs good and no smokeing

Abovetimberline

You have compression rings and oil rings,what is happening is you are loosing some compression past the rings and it is pressurizing the block. This does not mean your engine is about to go out,when they get to the point they are smoking your engine is toast. The problem you have is somewhat common. I suggested the compression check so you would know the health of your motor.

tweaks

alright then ill take it to my buddys somtime this week then thanx

gearheadette

I replaced the PCV valve in mine, and the oil stopped. $15 part 2 seconds to install, cant hurt to try

BlueXJ

Early engines had no PCV valve. Removing and cleaning the vacuum lines and the underside of the insertions into the valvecover helped.

tweaks

yea i asked a buddy of mine and he said to replace the pvc too like i said i know nothing about fixing cars just know how to tear them up lol

BlueXJ

Learning to work on Cherokees is a great teaching element for the future so you don't end up dependant on someone else to fix things for you. You gain confidence in your own abilities.

TimothyRaymond85

The best feeling is when you build a motor and start it up for the first time. I thought mine wasn't gonna run good but I had someone there the whole time giving me tips and it ran like a top. Also ran 12.10's all motor and 11.50's on the juice. I seen stroker 4.0L My plans are to build one of them next

tweaks

i cleaned out the things on top of the valve cover but they are going to get cloged again bc i have alot of sludge think i might try the diesel fuel thing i keep hearing about then clean them again

halmotors

Seafoam works wonders for clearing out oil sludge from under the valve covers. Just keep in mind two things:

1) You'll probably need to do another oil change in a thousand miles or so to clear out all the loose sludge that the Seafoam worked loose. This isn't always the case, but it's never a bad idea to get that crap out of your oil pan so your pump isn't fooling with it.

2) Adding Seafoam to your crankcase with an oil change can have a negative effect in that it'll cause some small oil leaks when it clears away the sludge. This is a pretty common problem, but in the years I've been using Seafoam, I've never seen it cause large leaks.

It also works awesome in your tranny, but getting a transmission flush done a few hundred miles after you put the Seafoam in helps a lot, too.

Also, Seafoam comes in two different flavors...one for your transmission, one for your engine. Make sure you use the right ones.

NewXJaddict

Yep, seafoam is some pretty good stuff. Buddy of mine that works at napa suggested it . There are many different ways to do it but he told me to put it in the crank case, run it in the driveway for about 20-30 minutes then change the oil. I have also heard to put it in the crank case about 100 miles before your next oil change.