I have a problem with my 94 e320 that I can't figure out. About a month ago the car started to run hotter that normal when sitting still and the water pump made a small squeeking sound that you could hear with the hood open. The thermostat had been replaced about a year ago so I got a new water pump (MB) and after replacing it the problem got '"no better". Actually it got worse. The car started to run to hot while moving, which I figured the radiator was not flowing the way it should. The return hose from the radiator never seemed to get hot and the car has 225,000 so I figured it was time to replace the Radiator. I also felt a little play in the fan clutch.
So, after putting in a new radiator and a new fan clutch and a new water pump(ALL MB PARTS) and refilling the coolant at a 50/50 mix, the car is still not cooling. The heater gets hot and the aux fans come on when they should, but the temp keeps rising.
SO, I say to myself, should have just replaced the thermostat first to see if this was the problem. I take out the thermostat, just to see if that is the problem, it opens and closes in hot water, it is midnight and no where to get a new one so I put the car back togeather without it and refill the coolent and the problem is still there!!!! But now the heater dosent get hot and the motor temp still keeps rising. The return hose from the radiator also dosent seem the get very hot while the hose from the pump is very hot.
Please help!!! What else is there to keep the motor from cooling