first my 300D was acting up and now my '85 300TDT is leaking radiator fluid. At first I thought, no big deal, I probably just need to replace a hose. Well, I cannot seem to find a hose that is leaking. When looking under the car, the fluid is literally dripping off of the engine itself. It is possible a gasket went bad and I'm leaking coolant from the engine?

The car runs fine and has not overheated.

Any advice is appreciated....it's raining car problems at my house. -Harv

Did you check the hoses at the rear of the engine for the climate system?

Also check the small hose by the thermostat, its like 4-5" long.

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'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Leaking from the front of the oil pan is usually a bad water pump.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

That usually makes a pretty distinctive noise in my experience, like metal pieces clattering and rubbing inside the pump.

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OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

The water pump on my car was not noisey when it began to leak coolant. Bearings were still good, seals were not.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Hmmm, water pump. If the water pump goes bad, doesn't the car overheat due to no water circulation?

I'm thinking it might be the water pump tho since I added some coolant....it is distinctively orange, but the only thing leaking out is still very green coolant. I'm thinking it is stil green because it is not circulating and mixing.

How hard is it to replace the water pump and what is the the defining way to diagnose this. -Harv

Water pump is usually the culprit if the leak is up front. No, it won't overheat. The seals in the pump are going bad.

The pump is not difficult. The fan comes off, the pulley comes off and the pump is right behind it.

To diagnose, just put your hand directly underneath the pump. If it comes up wet, you've found the culprit.