1996 Buick Regal 3.1-liter V6 engine
developed a leak in the cooling system.

Beneath the engine, behind and below the starter, off center toward the passenger side is a rounded rectangle shaped pan or cover, approximately 4 x 7",
In it are four holes laid out in a square pattern, roughly 3" hole to hole

The leak come from 2 of these holes.

It appears as though it is held on by only two bolts but i found that the removal of these two nuts alone do
not release it. I don't know if its held on by something else or simply rusted in place. I did not want to force it until i learn more.


I'd very much appreciate if someone could identify this part or
direct me to an engine diagram/exploded view or similar that might include it

Thanks for any help in advance.

You are looking at the bottom of the motor mount. I assume you had to remove a support underneath it that supports the front of the engine. The leak is from the front of the engine and running down. My first suspect is the timing cover, though it could be the water pump, though it is off center, it may be running over that way.

I should have said you are looking at the support for the motor mount, not the motor mount itself. I've been looking at the older A-bodies too long

I believe you may have a leak in the bypass at the throttle body. Take the stuff off and you'll see it under the TB.

The throttle body is on the opposite end of the 3100.
​​​​​A leak at return hose is a possibility too. I think I've had a litte of everything leak on our 3100.

Follow all plumbing for the coolant to find your leak. Your leak could be coming from about anywhere on the top.
You need to take things apart to see where it'* coming from.