Oil leaking out of dipstick. Help PLEASE!!!!

Hey guys I have a 1973 cj5 with a 258 1bbl motor. Oil is leaking from the dipstick. Today I drove it at about 55-60 mph and I had oil all over the firewall. When I run it at idle and give it gas it leaks out of the dipstick. I recently replaced the pcv valve and also put a breather on because I do not have the factory air cleaner. I believe it was leaking from the dipstick before I replaced the pcv. I also get what looks like white smoke from the oil dipstick and maybe a little out of the breather. There is no smoke that I notice coming out of the tail pipe. Does anyone know what could cause this and what I should do to try to fix it?

Thanks

 

It's likely that your piston rings are shot and the compresion being lost by the worn out rings is causing motor oil to be blown out of the dipstick tube. Mine does it too!

 

Could a blown head gasket cause this? Also if it was because of bad rings shouldn't I have blue smoke coming from the tail pipe? I believe my motor has some sludge buildup also. Could something be clogged??

Thanks

 

Worn rings, bad head gasket. too much oil, hole in piston, not enough venting. Any or any combination of the above, will cause this. Crud in the motor usually starves the lower half for oil. The oil can get to the upper workings (heads), but can't drain back down to the pan fast enough to keep up with the pump. Crud will and has wiped out many engines, but does not usually cause blowby..
Do a compression check, wet and dry. Next do a cooling system leak down (pressure) test. These two will let you know what is going on.

 

What source are you using for PCV?

 

Im using the manifold vacuum port on the intake below the carburetor for the pcv. Is it normal to have some moisture on the underside of the oil cap or could this indicate that it could be a blown head gasket? No water on the dipstick when I check it there though.

Thanks

 

You don't say where you are, so I'll assume that it is cold. Short trips, (anything under about 1/2 hour or so will cause the condensation. It is normal on a motor that does not get completely warm/hot. It's been a while since I had an inline but if I remember right they are not known for putting out a lot of heat. Drive it for a while, get it good and warm and the moisture should go away. You will prob always have the little milky bubbles on the inside of the fill cap, at least till summer. Some oils are worse for this than others. Penzoil always did it in my Fords. Don't know if that is the right place for the pcv.

 

Make sure the pvc valve is pulling the varpor from the engine to the carb and not the other way..

 

I will check the pcv today to make sure but I am pretty sure it is pulling the vapors out of the crankcase as it is hooked up to a vacuum source. I should be able to do a compression test by this weekend but I don't know about a leakdown test because I do not have the equipment.

Thanks

 

The PCV is supposed to take in fresh air from the air cleaner or its own filter. The air goes through the crankcase and out via the PCV valve, and into the engine at the base of the carb (manifold vacuum). The full circuit must be working - otherwise you'll have pressure or vacuum (depending on what's connected) in the crankcase.