Oil Leaking from Overflow tube?

[dons2346]

"If its a diesel, many diesels actualy have a crankcase vent tube. This vent tube releases hot oil vapor from the crank case."


All Country Coaches have their engine in the rear. This is a leak at the front end.

[TQ60]

If it leaked oil then gas will leak.

How lang since charged?

Check inside hose to confirm draining from hose then see where hose goes.

Could be bad seal at a connection to evaporator but if so do NOT turn on the ac instead get it checked and fixed.

[deandec]

Originally Posted by Mckeerw

I have a small amount of light oil leaking from an overflow tube just behind the front bumper. In the picture it's where the yardstick is, and you can see some puddled oil on the floor directly below it.

Attachment 73991

I've caught about 1.5 oz. in a pan. I had the A/C compressor replaced 2 weeks ago and I was wondering if it might be some sort of oil from that recharge process? It dripped for about 3 days after I parked it then stopped. The small amount in the picture is what dripped out after having pulled out to wash.

Ok, orange lightweight oil captured.
Leak is at the front end of a DP.
AC Compressor replaced two weeks ago in the engine area.
Presumably Pag oil, which is orange, added to the system with the new compressor.

Yes, you could have blown a plug of oil just in advance of the Evaporator.

That happened to me about 3 weeks ago after I replaced the two dryers in my system. I tried to add about 1 oz of oil with the 5 lbs of 134A to the system.

I became frustrated, because I could not add the 134A easily.

Then I discovered that PAG oil came blasting out of the connection into the bedroom dryer which I had failed to securely fasten. I do not know if that plug existed before I changed the dryer or whether the new oil caused the problem.

If I had not failed to secure the joint properly, I would probably still be trying to figure out why my rear AC system was not working.

I tightened the connection, filled the system with 134A easily, and the rear AC worked once again (the dash ac worked marginally prior to changing both the dryers).

So I would say, from recent experience, you may have or did have a plug in the dash Evaporator area which when under pressure caused a leak and oil to be excreted.

You might want to remove the dash panel to see if any oily coating is on the refrigerant lines at the evaporator.

It could be possible that the oil traveled down the outside of the tube you have identified.

Hopefully, that is not the problem.

[jeepersrus]

Ok here's my two cents. Roof a/c condensate drain. How well is your front a/c working?

[Mckeerw]

Here's an update to my original post. Finally was able to operate the dash a/c for about 2 hours. Good cold air, lots of condensate water dripping, no oil at all. But, I did not operate the bedroom air. On the way back tomorrow, I'll run the bedroom air as well and see what it does. Based on deandec's post #17, that may be where the problem is. I'll let ya'll know!