Remove/install coolant thermostat

AR20.10-P-2460RX

Remove/install coolant thermostat

20.7.09

 

Remove/install

1

Switch off ignition

2

Drain coolant at radiator

AR20.00-P-1142RX

3

Remove the left intake air duct and the front engine cover

See: 

Remove/install air filter housing

AR09.10-P-1150RX

4

Detach top coolant hose (1) from coolant thermostat housing (2) and place it on the side

 Installation: Replace O-ring (1a).

5

Remove poly-V belt

AR13.22-P-1202RX

6

Remove guide pulley (3) of poly-V belt



*BA20.10-P-1004-01U

7

Unlatch electrical connector at three-disk thermostat valve (Y110) and disconnect

8

Remove bolts (2a, 2 pieces)



*BA20.10-P-1003-01U

9

Pull out coolant thermostat housing (2) with coolant thermostat from timing case cover

 The coolant thermostat must not be taken out of the coolant thermostat housing (2) as it can get damaged in the process.

 Installation: Replace gasket (2b) and O-ring (2c).

10

Install in the reverse order



Checking

 Danger!

Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

11

Conduct engine test run and check engine for leaks

Number

Designation

Engine 272

Engine 273

BA20.10-P-1003-01U

Bolt, coolant thermostat housing to timing case cover

Nm

25

25

BA20.10-P-1004-01U

Bolt, guide pulley between water pump and belt tensioner

Initial installation

Nm

35

35

Follow-up operations

Nm

25

25