!990 350 SDL, coolant leaking high in the rear of driverside of engine. no obvious hose.
Leak goes up with rpm. No overheating. water pump thermostat new dry. oil is black, exhaust invisible, upper radiator hose soft.
cabin Heat has been reduced for 2 years. AC cold no issues with control module
Ideas please

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1990 350 SDL
Currently: 180,000 miles
Factory rebuilt bottom end rods, bearings and head gasket @ 75,000 in 1997

There's an o-ring gasket around a thing that heats your diesel fuel with a coolant loop taken at the head near there. Follow your diesel fuel lines from tank, they go through A thermostatic switching device that located near the engine mount on that side, then lines go up through this heater device near the head... Cyl. #5-6 close to the "throttle" linkage mounted on the intake manifold.

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Cheers!
Scott McPhee

1987 300D

Thanks Scott. I hope its not $500 labor for a $0.75 O ring GJE

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1990 350 SDL
Currently: 180,000 miles
Factory rebuilt bottom end rods, bearings and head gasket @ 75,000 in 1997

The plastic tee that feeds the heater core on my 95 cracked and leaked, slowly at first, then, it gushed. This is the tee that sits just above and next to the brake booster. Check hoses, connections, and those crummy MB hose clamps.

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2009 E320 Bluetec 117,000
1995 E300D 306,000 Sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000 Sold
2016 Ford Fusion 24,900

Crummy MB hose clamps!? ... Go on.

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Cheers!
Scott McPhee

1987 300D