Remove/install coolant pump

AR20.10-P-1271RT

Remove/install coolant pump

26.7.07

26.1.06

Cooling system

*BF20.00-P-1001-02X

 

Remove/install

 Danger!

Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof.

Keep body parts and limbs well clear of moving parts.

AS00.00-Z-0011-01A

 Danger!

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.

AS00.00-Z-0010-01A

 Danger!

Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by swallowing coolant.

Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.

Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

1

Switch ignition off, remove ignition key (transmitter key)

 On vehicles with Keyless Go, code 889: Press Keyless Go start/stop button repeatedly until ignition is switched off. Remove keyless go transmitter card or transmitter key from vehicle and store outside of transmission range (min. 2 m)

2

Open engine hood

AR88.40-P-1000RT

3

Unclip cover on engine firewall side

AR01.10-P-2405RT

4

Raise vehicle with vehicle lift

AR00.60-P-1000RT

5

Remove bottom engine compartment paneling

AR61.20-P-1105RT

6

Drain coolant at radiator

AR20.00-P-1142GZ



Notes on coolant

All engines

AH20.00-N-2080-01A



Coolant specifications

Sheet 310.1

BB00.40-P-0310-01A



Anticorrosion/antifreeze agents
(Sheet 325.0)

Sheet 325.0

BB00.40-P-0325-00A

 Cooling system

*BF20.00-P-1001-02X

 Test cap

*210589009100

 Cooler vacuum filling device

*285589002100

7

Detach bracket (1)

 Place to the side with lines still connected.

8

Remove coolant temperature sensor (B11/4)

 Use a screwdriver to press out retaining clamp (11).

 Installation: Replace O-ring.

9

Slacken bolts (2) of belt pulley (3)



*BA20.10-P-1002-01C

10

Remove poly-V belt

AR13.22-P-1202RT

11

Detach belt pulley (3) from coolant pump (4)

 Installation: Screw in screws (2) only by hand, do not tighten.

12

Detach guide pulley (6) for coolant pump (4)

 Pry off the cover (6a) using a screwdriver and undo the screw (4h).



*BA20.10-P-1008-01C

13

Dismount coolant hose (7, 8) from coolant pump (4)

 Inspect condition of coolant hoses and hose clamps, replace if necessary.

6 mm socket hexagon

7 mm socket hexagon

14

Disconnect coolant hose (9) from oil/water heat exchanger

 Inspect condition of coolant hose and hose clamp, replace if necessary.

 Hose clamp pliers

*003589033700

15

Unscrew bolt (12) for alternator (G2).



*BA15.40-P-1003-01N



*BA15.40-P-1005-01N

16

Unscrew bolt (13) for alternator (G2).

 Place alternator to the side with lines connected.



*BA15.40-P-1003-01N



*BA15.40-P-1005-01N

17

Detach and remove coolant pump (4) from timing case cover

 Installation: Replace the gasket (4a).

 Installation: Observe bolt diagram.

AR20.10-P-1271-03GZ



*BA20.10-P-1001-01C

18

Install in the reverse order

19

Inspecting cooling system for leaks

AR20.00-P-1010GZ

 Pressure pump

*124589242100

 Tester cap

*210589009100

 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

20

Conduct engine test run and check the engine for leaks

 In the event of oil loss determine and eliminate cause, otherwise malfunctions, transmission damage, and serious environmental pollution may occur.

Number

Designation

Engine
113.964/
971

BA20.10-P-1001-01C

Self-tapping screw connecting coolant pump to timing case

Thread not pre-tapped

M6

Nm

14

Thread not pre-tapped

M8

Nm

35

Thread pre-tapped

M6

Nm

10

Thread pre-tapped

M8

Nm

25

BA20.10-P-1002-01C

Belt pulley on coolant pump

Nm

10

BA20.10-P-1008-01C

Bolt, guide pulley to coolant pump housing

M8

Nm

20

Number

Designation

Engine
113
in model
164, 251

BA15.40-P-1003-01N

Alternator mounting screw

Nm

42

BA15.40-P-1005-01N

Self-tapping screw, alternator to timing case

Thread not pre-tapped

Nm

60

Thread pre-tapped

Nm

45

Number

Designation

Model
251
with engine 113

BF20.00-P-1001-02X

Cooling system

Total filling capacity

Liters

6.6

Capacity of anticorrosion/
antifreeze agent
down to -37 °C

Liters

3.3

Filling capacity of anticorrosion/ antifreeze down to -45 °C

Liters

3.6

Service specifications

Sheet

BB00.40-P-0310-01A

Sheet

BB00.40-P-0325-00A