Raw oil passing out of tailpipe

[farm1810]

Greatings all.  My L-head has been doing fine from an oil consumption / smoking standpoint when suddenly today in the driveway it started smoking a great deal and liquid motor oil was dripping from the tailpipe.  Would a stuck PVC valve cause this?  The engine sounds fine, idles fine, revs up fine (although with lots of smoke).  It seems hard to believe something serious inside the engine just suddenly happened.  Thoughts? 

[1955CJ-5]

Here are a couple of things that I would look for.

I would verify that it is oil.  It just seems to me that for oil to be dripping out the exhaust, there would have to be a lot of oil in the tail pipe and muffler. Excess water vapor would be black and sooty by the time it condensed and exited the tail pipe. Blue exhaust smoke is oil smoke, light colored almost white smoke would be water vapor.

Check the oil in the sump. If it is milky colored it has water mixed in. I'm thinking maybe a head gasket has failed.

Also smell the oil in the sump via the dipstick. Does it smell like gasoline? Gas can enter the sump through a failed or ruptured diaphragm in the fuel pump. There was a thread a while back where the engine was literally pumping a gas/oil mixture out through the oil filler tube. This in turn filled the cross tube and from there into the carb and cylinders. The fuel pump diaphragm had failed and the sump filled until it came gushing out the oil fill tube. It was amazing... I'll post it if I can find the thread.

Removing and inspecting the sparkplugs might turn up a wet or excessively sooty plug. This may at least point you to one particular cylinder.

A compression check may tell you something as well.

Good luck...I'm going to look for that other thread with the failed fuel pump.

[1955CJ-5]

Here is the video. It takes a few seconds before the oil starts flowing..

https://www.youtube.com/watch?v=1EiQVnz2h8c


And here is a link to the entire thread. lots of good troubleshooting info.


https://cj3apage.com/Forum/index.php?topic=4833.30

[Rus Curtis]

I agree, if oil is dripping...that's a lot of oil.  If so, there'd be a noticeable drop on the dip stick.  The smoke, was it blue-ish or white? 

I don't believe the L-head has oil passages through the head, so I'd wonder if the smoke is water (white) and you should see a lower coolant level in the radiator.  Or as mentioned, that coolant may be making its way into the oil pan.

It can't hurt to detach the PCV valve from the intake to see if fluid comes out but I'm guessing not. 

It's easy to jump to conclusions, but more helpful to walk through a few steps to see what you're experiencing.

[farm1810]

Thanks everyone.  What a terrible experience.  I took the PCV valve apart.  It was totally clean.  One of you sent me a link about this subject and I saw an orifice in the floating valve that I didn't remember.  Yikes!  Mine was totally closed with carbon and I had to drill (by hand) that opening to what is required.  All fixed!!!  I am AMAZED! All now sees fine.  Thanks for all of your help.