Location of Water Pump on 1987 300E - PeachParts Mercedes-Benz Forum

ejsharp · #1 12-13-2002, 05:05 PM

I have a leak somewhere toward the front of the engine and coolant is dripping off the side of the oil pan near the drain plug. But I cannot for the life of me see where it is leaking from. In fact I am not even sure where the water pump is located. It seems like it is sort of side mounted rather than directly in front of the engine block like all other water pumps that I've worked on. I tried looking under pullies with a mirror but have had no luck even finding the "leak hole" usually found on water pumps.

Will someone confirm where the pump is located... is it the housing with all of the water hoses going into it? If so then the pump is offset and side mounted. Also exactly where will I find the "leak hole"?

Thanks.

Earl

PS I took the air breather cover off and I see no evidence of leaks from other areas of the engine.

chowpit · #2 12-13-2002, 07:14 PM

Sandwiched between the cylinder head and the power steering pump. Both radiator hoses are attached to it. The weep hole is very hard to see. Requires an inspection mirror. More than likely its the water pump leaking. Check the hoses carefully first.

ejsharp · #3 12-13-2002, 08:45 PM

Thanks Scott...

I tried finding the hole with a mirror about and inch in diameter.. the standard auto inspection mirror... but no luck. I understand that some pumps on the 300E have a hose connected to the weep hole. If so in this case then that may explain why I cannot see the hole... but I can't see a hose either... everything is blocking my view... at least from the top. I cannot inspect from the bottom now because my driveway is a puddle... a consequence of snow and now continuous rain.

What really pisses me off is that my wife wants me to build an addition onto the house. Screw it! I need a garage!

Earl

ILUVMILS · #4 12-13-2002, 09:04 PM

The 1 inch mirror is the one you need, but you have to be in EXACTLY the right spot to see the hole.

ejsharp · #5 12-13-2002, 09:30 PM

I am looking behind the pully on the bottom side of where I expect the bearing and seal to be along the shaft housing. Where is the hole located? Is it back toward the rear of the car? Is it centered at the bottom radius of the shaft housing or offset to a side?

Anything you may recall regarding its location would be most helpful.

Again thanks.

PS. Do I have to remove anything like a dip stick housing or the tension adjuster in order to see the hole with the mirror?

ILUVMILS · #6 12-13-2002, 09:43 PM

You don't need to remove anything. The hole is on the bottom, pointing straight down. Like I said, you have to be in exactly the right spot to see it. Keep trying!!!