Cooling System Components, Engine Side

Cooling System Components, Engine Side

Part 1

Part 2, refer to.





1 Cylinder Block

2 Oil Cooler

3 Bolt

• 25 Nm

4 Bolt/Nut

• 10 Nm

5 to Heater Core of Heater, Bottom

6 Retaining Clip

7 O-ring

• Replace

8 Front Coolant Pipe

9 Connecting Hose

10 O-ring

• Replace

11 Coolant Pipe

12 Connecting Hose

13 Connecting Piece

14 to Radiator, Bottom

15 Bolt

• 5 Nm

16 O-ring

• Replace

17 Coolant Thermostat

• Removing and installing, refer to => [ Coolant Thermostat ] Coolant Thermostat.

• Pay attention to the installed position: the valve must be at the top.

• Checking (coolant thermostat installed). Refer to the vehicle tester "Function and Component Selection".

• Checking (coolant thermostat removed):

Warm the thermostat in water.

Opens at: approximately 87 °C (188.6 °F) and stops at: approximately 102 °C (215.6 °F) opening travel: minimum 7 mm.

18 Seal

• Replace

19 Bolt

• 25 Nm

20 Coolant Thermostat Housing

21 Seal

• Replace

22 Accessory Bracket

23 Bolt

• 10 Nm

24 Coolant Pump

• With integrated silicone seal for sealing the cylinder block.

• Removing and installing, refer to => [ Coolant Pump ] Service and Repair.

25 Right Coolant Pipe

• Secured to the engine mount.

26 to Expansion Tank, Bottom

Part 2

Part 1, refer to.





1 Coolant Connection

• Pressed in the cylinder head.

• Clean before installing the coolant distribution housing - item 17 -.

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

• If the connection is worn, replace it using locking fluid (D 000600 A2).

2 Circlip

3 Seal

• Replace after removing the coolant distribution housing - item 17 -.

4 to Expansion Tank, Top

5 Rear Coolant Pipe

6 Bolt/Nut

• 10 Nm

7 Heat Shielding

8 to Heater Core, Top

9 Supply Hose

10 Bypass Thermostat

• Only for vehicles with a automatic transmission.

• Assembly overview, refer to.

• Checking, refer to.

11 to Automatic Transmission Fluid (ATF) Cooler

• Only for vehicles with a automatic transmission.

12 to Heater Core, Bottom

13 from Automatic Transmission Fluid (ATF) Cooler

• Only for vehicles with a automatic transmission.

14 Return Hose

15 Coolant Pipe

• Bolted to the coolant distribution housing - item 17 -.

16 to Coolant Distribution Housing

17 Coolant Distribution Housing

18 Supply Hose

19 to Top of Radiator

20 Coolant Hoses

• Only for the throttle valve control module 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
Pay attention to the installed position: the arrow points to the ATF cooler
3 Operating element
4 Spring
5 O-ring
6 Upper part of housing

Bypass Thermostat Checking

- Remove operating element - 3 - and heat in a hot water bath.

Opens at: approximately 75 °C (167 °F)

Stops at: approximately 85 °C (185 °F)

Opening travel: approximately 5 mm