Just bought a 2002 S60 5 speed, non-turbo with 53k miles on it to replace the 89 240DL that has 250k miles on it.

Noticed some oil drops on the garage floor so we took it down to the local mechanic yesterday and put it up on the rack.

Found that on the back of the block, in the middle, below the exhaust is a round boss about 1" in diameter that stickes out from the block about 1/2". When the engine was reved up oil would squirt out of this hole and onto the bottom of the car and exhaust pipe.

It looks like something is supposed to go in this hole. Anyone have any ideas on what it might be?

There was another volvo there with the same 5 cylinder engine. We looked at it and it appeared the hole had never been drilled out or it has some type of a metal cup plugging this hole.

We installed a 1/2" dorman rubber expanding plug in the hole to stop the oil leak.
I'll try to get a picture of it later today.

Thanks for you help,

John