Viscous fan removal

[Shamrocker07]

hello there

this is my first post and i hope to be a usefu part of this forum.I drive a 96 E 200 estate (124) it is very reliable and practacle but i've had a leak coming from my water pump,i removed this and applied gasket sealer hoping that would slve the problem,it did not.the leak seems to be coming from behind the fan but i cant remove the fan to inspect it closly,do i need a special tool to do this or is there a more simple way i am overlooking.
any help would be greatly appreciated
thank you in advance
J

 

[television]

Try this and see if its OK

http://www.mercedesshop.com/Wikka/M103WaterPump


Welcome to the forum, if no good I can find some more

 

[Shamrocker07]

thanks for that but the catr has a different set up,i got the fins of the fan assembly but i need to romove the center part and i have not a clue as to how

 

[television]

Can you put up the next 3 numbers after 124

 

[C220GJS]

Your's is an M111 engine.
The fan hub is held onto the water pump shaft by a large nut ,32 or 33mm i think which unscrews clockwise. You will need to refit the fan belt and pulley to give some resistance to turning then position the spanner securely and give it a sharp blow with a hammer, the thread normally releases easily in my experience.

 

[wireman]

The leak from behind your fan suggests to me that the gland in the water pump has failed, a new pump will be required if this is so.

The gland is on the water pump shaft on the engine side of the water pumps bearing on most pumps there is a drain hole on the nose of the pump behind the pulley, put your fingers (cold engine) under or a mirror (the small one in bosses hand bag will do) if it looks or feels damp or drippy there's your fault. When the thing is running it gets hot enough to dry up the lost water and magicaly it seems that there is no leak anywhere around there, so check it before first start in the morning.

Due to the manner in which water pump glands wear, the starting to become worn ones often only leak when the cooling system is pressurised and the engine is not turning i.e. just after you stop and switch off (and then not always) so a check once its been stopped a wee while may also be of benifit in diagnosis. It is often only after some period of slight water loss that the pumps gland fails completely and all the water is lost, this can lead to a very expensive engine failiure.

Some pumps require a locking tool to enable the pulley and fan to be removed this may be a pin or fancy clamp that grips the pulleys edge, take care not to bend anything whilst improvising if the nut or bolt will not budge easily.

 

[Shamrocker07]

thanks guys,the leak is coming from the drain hole so i guess i'd best get a new pump i got quotes 88.80 euro,is that reasonable?

 

[Ian B Walker]

If you cannot undo the fan retaining nut (left handed thread) get a piece of 3 inch flat bar 1/4 inch thick. Cut a 2 inch wide slot in it about 2 1/2 long. Place this over the 4 bolts on the pulley, fit the spanner and then undo.