20-210 Removing and installing coolant pump
Preceding work: Draining - filling in coolant (20-010). Removing and installing V-belt (13-342). | Operation No. of operation texts and operation values or standard texts and flat rates 20-1270 |
P20-0031-55 A
Belt pulley (72) | unscrew, screw on, tightening torque of hex. socket bolt 10 Nm, Torx socket bolt 15 Nm (step 3). |
Cable connector (68a) | detach from solenoid body, plug in (step 4). |
Solenoid body | unscrew, screw on, pay attention to installed position, tightening torque 10 Nm reference value (step 4). |
Coolant hoses (56, 57 and 58) | detach, attach (step 5). |
Bolt (50) | for shock absorber (28), unscrew, screw on, tightening torque 25 Nm (step 6). |
Bolts (51) | unscerw, screw on. Place alternator with connected cable to the side (step 7). |
Bracket (156) | detach, attach by removing bolts (49, 3 ea.), screwing on, tightening torque 25 Nm. |
Coolant pump (1) | unscrew, screw on, pay attention to bolt length, tightening torque 10 Nm. Clean sealing surfaces (step 10). Note Only use paper gasket 102 201 00 80 (2) if the timing case cover is sealed with liquid sealant. Otherwise seal coolant pump with sealant |
Cooling system | check for leaks (20-017). |
Special tools
001 589 72 21 00
124 589 15 21 00
Commercially available tool
7 mm wrench socket on flexible shaft | eg. Hazet, D-42853 Remscheid |
Note
The pump chamber for the impeller of the coolant pump is located in the timing case cover (arrow).
P20-2054-13
Components
The bearing (2) of the coolant pump shaft and the cassette-type seal (6) are press-fitted into the coolant pump housing.
1 Coolant pump housing
2 Coolant pump bearing
6 Cassette-type mechanical seal
15 Impeller
68 Solenoid body
68b Carrier
72 Belt pulley
73 Flange
74 Fastening bolts
75 Fan
76 Angular-contact ball bearing
77 Armature
78 Tensioning pulley
79 Pulley
80 Fastening bolt
P20-0027-15
Removal and installation
-------------------------------
1 Drain coolant, fill in (20-010).
2 Remove and install V-belt (13-342).
3 Unscrew belt pulley for coolant pump.
Note
Pay attention to bolt versions and tightening torques.
Hex. socket bolts 10 Nm
Torx socket bolts (as of 9/85) 15 Nm
P20-2052-13
4 Disconnect cable connector (68a), plug in, unscrew solenoid body (68), screw on (arrows).
P20-2051-13
5 Detach coolant hoses (56 and 57) as well as bypass line (58), connect.
P20-2154-13
6 Unscrew bolt (50) for shock absorber of belt tensioning device, screw on, tightening torque
25 Nm.
7 Unscrew bolts (51) and place alternator to the side.
Tightening torque 45 Nm.
8 Unscrew bracket (156), screw on, tightening
torque 25 Nm. For this step, remove bolts
(49, 3 ea.), screw on, tightening torque 25 Nm.
P20-2049-13 A
9 Detach coolant pump, attach. For this step,
remove bolts (21), screw in, tightening torque
10 Nm. Pay attention to bolt length.
10 Clean sealing surfaces.
Note
A paper gasket Part No. 102 201 00 80 is
supplied in the parts sector as a seal of the
coolant pump at the timing case cover. This
gasket may only be fitted if it is assured that the
timing case cover is sealed only with liquid
sealant. Otherwise use sealant
002 589 00 20 10.
11 Check cooling system for leaks (20-017).
P20-2048-13