Drain/fill coolant at coolant pump

AR20.00-P-1146W

Drain/fill coolant at coolant pump

12.11.2018

Engine

276 in model 172

Shown on engine 276.9

1

Coolant pump

3

Drain hose

5

Drain screw

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from 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

Topical note

Notes on coolant

AH20.00-N-2080-01A

Notes on coolant level

AH20.00-P-1142-01CW

Drain off

1

Slowly open cap on coolant expansion reservoir, relieve overpressure and then remove cap

2

Remove lower front and center lower engine compartment paneling

AR61.20-P-1105W

3

Release drain screw (5) at coolant pump (1)

4

Push drain hose (3) onto drain screw (5)

5

Open drain screw (5) at coolant pump (1) and collect escaping coolant in suitable container

 Observe regulations to dispose of coolant.
Re-use clean coolant.

Pour in

6

Remove drain hose (3) from drain screw (5)

7

Tighten drain screw (5) on coolant pump

 Drain screw on coolant pump

*BA20.10-P-1008-01AA

8

Pour in coolant and ventilate engine cooling system



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A



Coolant specifications

BB00.40-P-0310-01A

AR20.00-P-1142-04A

 Re-use clean coolant.

 Engine 276.8 in model 172
Engine 276.9 in model 172Cooling system

*BF20.00-P-1001-02BA

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100

 Test cap

*210589009100

 Cooler vacuum filling device

*285589002100

9

Check engine cooling system for leaktightness

AR20.00-P-1010W

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

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

AS00.00-Z-0005-01A

10

Perform an engine test run and check engine cooling system for proper operation

 Coolant pump, coolant thermostat

Number

Designation

Engine 276

BA20.10-P-1008-01AA

Drain screw on coolant pump

Stage 1

Nm

6

Stage 2

°

90

 Cooling system

Number

Designation

Engine 276.8 in model 172

Engine 276.9 in model 172

BF20.00-P-1001-02BA

Cooling system

Workshop replacement amount

Main circuit

l

10,4

10,4

Low-temperature circuit

l

3,4

-

Antifreeze/water

Up to -37°C

%

50/50

50/50

As of -38 °C

%

55/45

55/45

Specifications for Operating Fluids, sheet

BB00.40-P-0310-01A

BB00.40-P-0310-01A

Specifications for Operating Fluids, sheet

BB00.40-P-0325-06A

BB00.40-P-0325-00A

Specifications for Operating Fluids, sheet

BB00.40-P-0326-06A

BB00.40-P-0326-00A