I have a 91 g92 5-speed car that I just got a few weeks ago and I am still going over the car. I noticed something baffling on the oil cooler. My car is supposed to have a oil cooler, but I only have the adapter, no lines and no cooler.
I am at a loss here. There is no plug on the lines, why is oil not spraying out? It has oil in the car and really good pressure and I have driven the car around 50 miles so far.
Anyone with a pic of the original setup please post.

 

That is a factory oil cooler, also known as a heat exchanger.
Water runs through it and cools the oil that is circulating through the coils.(plates)
It looks like someone took off the water lines and disabled it.

 

Okay, I get it. At first I thought the oil went through hoses to a cooler in front of the radiator.
Thanks.