DieselYJ
08-06-2002, 05:32 AM
I finally got the CJ on the road last night. When I got back it was dribbling oil out of the dipstick, and by the looks of the engine bay on the passenger side, it was doing more than that at higher speeds. When it is idleing and i remove the dipstick, the oil is spitting out.
I have just got this on the road, so some of the stuff(ok most of it) is not hooked up. The pvc valves are in, but not hooked up.
Could this be the problem???
Any other ideas??
Thanks in advance.
Jakesteramalamajama
08-06-2002, 05:49 AM
How many miles? My 258 got to the point where it would do the same thing--spit oil outta the dipstick and breathers and blow seals if any effort was made to plug them. That was at around 170,000 miles. Blow-by. If you have a higher-mileage engine, a top-end rebuild with a ring job might be your only answer.
HTH,
Jake
DieselYJ
08-06-2002, 05:52 AM
I really have no idea, i bought it at a sale and the odometer says 88k, but i did have the head off and the pistons are 30 over so it has been rebuilt once already.
There does not seem to be a lot of blow-by when i remove the fill cap though.
Jakesteramalamajama
08-06-2002, 06:36 AM
If it's only at 88K and it's already been rebuilt once, it's probably fine, but the only real way to find out if you have one or more bad cylinders is to do a leak-down/compression test on each one.
They'll also blow oil if you over fill them, but I assume that's probably the first thing you checked.
Good luck,
Jake
JeepinIan
08-06-2002, 08:41 AM
Hook up the PCV to a vacuum source. What can happen is the minute amount of blow-by that is normal can cause increased crankcase pressure. This pressure has to go somewhere and generally it will push oil up the dipstick tube.
I had this happen to me when I built a 400 samll block ofr a Firebird I raced at one time. Connected the PCV to a vacuum source and it went away.
patooyee
08-06-2002, 08:44 AM
I think your problem is the PCV valves. The fact that you said there is more than one of them is the giveaway. There should only be one PCV valve, and it should be in the front valve covor hole. The back hole should have an oil-seperator filter in it. Make sure that the PCV valve is operating correctly. Your problem is that the 2 PCV valves are blocking up most of your pressure relief in the crank case and the pressure buildup is forcing the oil up the dipstick. To find out for sure, just take the rear PCV out and run it for a while. All the pressure will vent out the hole and you shouldn't get any oil out of the dipstick. If it works, go get an oil vapor seperator thingy and stick it in there so you don't make a mess.
J. J.