Cooling system pump and thermostat
Vehicles without SCR catalyst
1. Bolt: 23 Nm.
2. Bolt: 9 Nm.
3. Cooling system hose: to the bottom of the right radiator.
4. Connecting pipe with thermostat.
5. Lip seal: replace.
6. Water pump.
7. Bolt.
8. Belt drive pulley for water pump: installation position: the inscription "vorne" (front) points in the direction of travel.
Cars with SCR catalyst
1. Connecting pipe with thermostat.
2. Cooling system hose: from the radiator, bottom right.
3. Bolt: 9 Nm.
4. Cooling system hose: to the coolant pipe on the top left.
5. Cooling system hose of the radiator pump. exhaust gas recirculation "V400".
6. Connecting nipple with system thermostat. exhaust gas recirculation.
7. Sealing ring: replace.
8. Lip seal: replace.
9. Bolt: 9 Nm.
10. Water pump.
11. Bolt.
12. Belt drive pulley for water pump; installation position: the inscription "vorne" (front) points in the direction of travel.
13. Bolt: 23 Nm.
Sequence and tightening torque
Tighten the coolant pump bolts "arrow" crosswise in stages, final tightening torque 9 Nm.
Take off
Drain the coolant. Remove the upper part of the intake manifold. Remove the radiator pump system. eGR valve "V400". Remove the poly V-belt.
CAMA, CAMB, CCLA, CCWA, CCWB, CGKA, CGKB: Turn the timing belt cover forward of the "arrow" and hang the bracket on the bottom of the timing belt cover.
CAPA: Loosen the "arrow" clamps, rotate the timing belt cover forward and hang the bracket on the underside of the timing belt cover.
Unscrew the "arrow" bolts of the poly V-belt pulley of the coolant pump, using a 2-hole "3212" wrench as a support.
Unscrew the bolts and remove the water pump "arrow".
Install
Installation in reverse order. Clean the sealing surfaces. Tighten the coolant pump cover bolts. Install the poly V-belt. Install the radiator pump system. eGR valve "V400". Install the upper part of the intake manifold. Fill with coolant.