Cooling System Components - Engine Side, Assembly Overview
Cooling system components (on engine), assembly overview
Part 1
1 - Cylinder block
2 - Oil cooler
3 - 25 Nm
4 - 10 Nm
5 - To heater core of heater, bottom
6 - Retaining clip
7 - O-ring
^ Replace
8 - Front coolant line
9 - O-ring
^ Replace
10 - Coolant line
11 - Connecting hose
12 - Connecting piece
13 - To radiator, bottom
14 - 5 Nm
15 - O-ring
^ Replace
16 - Coolant thermostat
^ Note installation position:
- Valve must be at top
^ Checking: Heat up thermostat in water
- Starts to open: approx. 87° C End of opening: approx. 102° C Open distance: at least 7 mm
17 - Seal
^ Replace
18 - 25 Nm
19 - Coolant thermostat housing
20 - Seal
^ Replace
21 - Bracket for assemblies
22 - 10 Nm
23 - Coolant pump
24 - O-ring
^ Replace
25 - Connecting hose
26 - To expansion tank, bottom
Part 2
1 - Pipe connection
^ Pressed in cylinder head
- If necessary, remove coolant deposits using a copper wire brush or fine sandpaper (minimum 100 grit).
2 - Circlip
3 - Seal
4 - To expansion tank, top
5 - Rear coolant pipe
6 - 10 Nm
7 - To heater core, top
8 - Supply hose
9 - Bypass thermostat
^ Only for vehicles with automatic transmission
10 - To ATF cooler
^ Only for vehicles with automatic transmission
11 - Supply hose
12 - From heater core, bottom
13 - From ATF cooler
^ Only for vehicles with automatic transmission
14 - Return hose
15 - Coolant line
16 - To coolant regulator housing
17 - Coolant distribution housing
18 - Supply hose
19 - To top of radiator
20 - Coolant hoses
^ Only for Throttle Valve Control Module J338 heated by coolant
21 - Throttle valve control module J338
^ Connection only for coolant heated Throttle Valve Control Module J338
22 - Engine Coolant Temperature (ECT) Sensor G62
23 - O-ring
^ Replace
24 - Retaining clip
Bypass thermostat - assembly overview
1 - Spring bracket
2 - Lower part of housing
- Note installation position: Arrow points toward ATF cooler
3 - Operating element
4 - Spring
5 - O-ring
6 - Upper part of housing
Checking bypass thermostat
- Remove operating element - 3 - and heat in a hot water bath.
- Starts to open: approx. 75° C
- Opening end: approx. 85° C
- Opens: approx. 5 mm