[ctdale]

I have a 1988 190E 2.3. There is oil blowing out of the oil fill cap. I replaced the cap but it is still doing it. What's next?

 

[renaissance_warrior]

You may need to replace your valve guides and/or seals. Do a compression test . Serious blow-by from wear. You may want to check your pcv valve first.

 

[ctdale]

Where is the PCV valve located on the 2.3 motor?

 

[westwind999]

If your PCV checks out OK you might want to give a product called Autorx a try. It's about the only oil additive I'd recommend. Google search for lots more info.

 

[aardvark]

Make sure you didn't buy one of those oil caps with a pinhole on the top. They will do that.
Check the seal. Mine is so tight it is actually hard to remove, and I have heard that from others as well. A loose one will leak badly.
Those are the first and obvious things to look at.

 

[ctdale]

The oil cap is very tight, hard to get off, so that's not the problem. Where is the PCV valve located?

 

[Benznoob26]

The oil cap is very tight, hard to get off, so that's not the problem. Where is the PCV valve located?

Under the air intake ton the right side of the valve cover runs right next to it and into valve cover. A broken pcv valve will disperse a large amount of oily gunk all over the front right(if your looking at the engine) of the engine compartment. Just start your car, pop the hood, wait a minute or two if you smell a sort of rich exhaust it's a broken pcv valve.

Though it doesn't sound like one oil never came through my oil cap.

Sounds like too much oil in engine?