System Component Layout

Coolant Pump, Cooling System






CAUTION! Coolant/antifreeze must not be reused when replacing engine, cylinder head, cylinder head gasket. radiator and heater core.


NOTE:
- always replace all gaskets and 0-rings
- all components shown can be removed/installed with the engine in vehicle
- during repairs, the original spring type hose clamps may be replaced by the screw type
- install spring clamps using pliers Haziet 798-5 or a commercial plier equivalent,

1 - 25 Nm (18 ft lb)
use coolant pump wrench VAG 1590 to loosen/tighten
2 - V-belt pulley
3 - 20 Nm (15 ft lb)
4 - Coolant pump
removing and installing, Service and Repair
5 - Throttle body housing
6 - O-ring
replace
7 - From cylinder head
8 - Auxiliary electric coolant pump (V51)
checking, Testing and Inspection
9 - Connector
10 - Rubber retainer
11 - From heat exchanger
12 - To heat exchanger
13 - 10 Nm(7 ft lb)
14 - Trim
15 - Coolant expansion tank
with coolant low level switch
16 - Pressure cap
- check with cooling system tester VAG 1274, and adapter VAG 1274/3, VAG 1274/4
- relief valve opens 1.2-1.5 bar (17.4-21.8 psi)
17 - Coolant hose, upper
to radiator, upper
18 - Coolant hose, lower
from radiator, lower
19 - Thermostat housing
disassembling/assembling, Diagrams
20 - To cylinder block
21 - Oil cooler
22 - Drain plug
draining and refilling coolant, Service and Repair
23 - Coolant tube