1991 190E 2.3 Water pump removal diagram
 

1991 Mercedes Benz 190E 2.3 (201.028) L4-2.3L (102.985)

Removal and Installation:
*Drain cooling system.
http://www.2carpros.com/forum/automo...900_wpc1_1.gif
*Remove fan and fan shroud.
*Tightening torque of the bolt (80): 25 Nm (18.5 ft lbs) .
*Remove Poly V-Belt.
http://www.2carpros.com/forum/automo...900_wpc2_1.gif
*Unbolt belt pulley for engine coolant pump.
*Pay attention to bolt versions and tightening torques. Hex. socket bolts 10 Nm (7.4 ft lbs)

Torx socket bolts 15 Nm (11 ft lbs)
http://www.2carpros.com/forum/automo...900_wpc3_1.gif
*Disconnect cable connector (68a).
*Unbolt solenoid body (6 bolt on (arrows).
http://www.2carpros.com/forum/automo...900_wpc4_1.gif
*Detach engine coolant hoses (56 and 57) as well as bypass line (5.
http://www.2carpros.com/forum/automo...900_wpc5_1.gif
*Remove bolt (50) for shock absorber of belt tensioning device (if equipped).
*Tightening torque: 25 Nm (18.5 ft lbs) .
*Unscrew bolts (51) and place alternator to the side.
*Tightening torque: 45 Nm (33 ft lbs) .
*Unscrew bolts (49), remove bracket (156).
*Tightening torque: 25 Nm (18.5 ft lbs) .
http://www.2carpros.com/forum/automo...900_wpc6_1.gif
*Remove bolts (21), remove pump.
*Tightening torque 10 Nm (7.4 ft lbs) .
*Pay attention to bolt length.
*Clean sealing surfaces.
*Reassemble in reverse order.
NOTE:
A paper gasket Part No. 102 201 00 80 is supplied in the parts sector as a seal of the engine coolant pump at the timing case cover. This gasket may only be installed if it is assured that the timing case cover is sealed only with liquid sealant. Otherwise use sealant 002 589 00 20 10.

**Check engine cooling system for leaks.