We have 2 1995 E320's that are heating up way too high when running. One has been diagnosed at the repair shop for a malfunctioning fan clutch. They also said that as the car was running hot the water pump and thermostat should also be replaced (??) The water pump is 5.5 hours of labor and I cannot afford it right now. I was wondering how hard to replace it myself. Thanks
I just replaced a water pump on my C Class 220 cdi it cost me ?40 for the pump and under an hour to change it ,but it was gone and you could hear it was gone,so i doubt if its the pump,it may be that the thermostat is jamming ,or if the water is boiling over its much worse it could be the cylinder head gasket but you should definitely get a second opinion and avoid the mercedes dealers they just charge an arm and a leg good luck.
I have a 94 E320 in the shop right now with the same issue , running hot but not overheating and i wouldn't even consider replacing the water pump cause i have found the fan clutch not engaging at all . and you need a second opinion . is it possible for a water pump to cause this issue ....yes....is it likely.....NO if the fan clutch is engaging and the car still runs hot but does not overheat the thermostat is most likely not opening completely (sticking) and not allowing proper coolant flow . or you may have an inaccurate CTS .(coolant temp sensor) either way find a place who can properly diagnose your car . i hope this helps you
Contrary to the mythology, a Mercedes is just a car, and the cooling system isn't very different from any other car. Well within the ability of any good mechanic. Most likely causes of overheating are malfunctioning fans, either the clutch or the electric fans. Other likely suspects are the fan sensors, lower radiator hose and thermostat. Then consider a plugged radiator. The water pump is on the list, but way down. I think you should start with the obvious, cheaper stuff first.
Contrary to the mythology, a Mercedes is just a car, and the cooling system isn't very different from any other car. Well within the ability of any good mechanic. Most likely causes of overheating are malfunctioning fans, either the clutch or the electric fans. Other likely suspects are the fan sensors, lower radiator hose and thermostat. Then consider a plugged radiator. The water pump is on the list, but way down. I think you should start with the obvious, cheaper stuff first. So basic
