Cooling System Components Assembly Overview, Engine Side

Cooling System Components, Engine Side 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 - Connecting hose
10 - O-ring
^ Replace

11 - Coolant line
12 - Connecting hose
13 - Connecting piece
14 - To radiator, bottom
15 - 5 Nm
16 - O-ring
^ Replace

17 - Coolant thermostat
^ Note installation position:
- Valve must be at top

^ Checking (coolant thermostat removed):

Heat up thermostat in water

- Starts to open: approximately 87° C End of opening: approximately 102° C Open distance: at least 7 mm

18 - Seal
19 - 25 Nm
20 - Coolant thermostat housing
21 - Seal
22 - Bracket for assemblies
23 - 10 Nm
24 - Coolant pump
^ With integrated silicone sealing ring for the cylinder block seal

25 - Right coolant line
^ Secured to engine mount

26 - To expansion tank, bottom

Part 2





1 - Coolant connection
^ Pressed in cylinder head

- If necessary, remove coolant deposits using a copper wire brush or fine sandpaper (minimum 100 grit).

^ If pipe connection is worn, replace it using locking fluid D 000600 A2.

2 - Circlip
3 - Seal
4 - To expansion tank, top
5 - Rear coolant pipe
6 - 10 Nm
7 - Heat shielding
8 - To heater core, top
9 - Supply hose
10 - Bypass Thermostat
^ Only for vehicles with automatic transmission

11 - To ATF cooler
^ Only for vehicles with automatic transmission

12 - To 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
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: approximately 75° C
- Opening end: approximately 85° C
- Opens: approximately 5 mm