1996 GMC Jimmy -

I am driving (drove) a 1996 GMC Jimmy, 4.3 Liter V6 Vortec engine

Is there something like a input Oil Seal in my GMC Jimmy?
After driving ca. 200km last Weekend,
my Buddys temperatur was going a little bit higher,
than usual.
I allways pay close attention to the display at
the instrument panel.
I drove very slowly and took several longer breaks to
let car cool off.

After arriving at my destination, my Buddy had several hours to rest.
As I returned to the car, I noticed a heavy Oil firm at
my Buddy backside. The whole backdoor and the window was coated.

I checked all fluids and could not find anything unusal and went back home - driving max.80km/hours.

A friend of our Family took a very short look at my Buddy.
It looks like Oil was pressuring trough the exhaust, but he could not find any information about an input Oil seal in Mitchels on demand?

Does anybody have an idea? I urgently need my Car back on the street.
:idea:
Thank you very, very much for your time!

Barbara