Inspect cooling system for leaks

AR20.00-P-1010MCC

Inspect cooling system for leaks

28.04.2015

Engine

132.9, 660.9 in model 451.3/4

Engine

780.993 in model 451.390/392/490/492

1

Cap

2

Expansion reservoir

 Danger !

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

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

AS00.00-Z-0010-01A

 Danger !

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



Notes on coolant

AH20.00-N-2080-01A



Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Check

1

Remove maintenance flap

2

Turn cooling system cap(1) on expansion reservoir (2) a half turn counterclockwise, relieve the overpressure and then unscrew the cooling system cap (1)

3

Check coolant level in expansion reservoir (2), correct if necessary



Coolant specifications

BB00.40-P-0310-01A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A

 The engine coolant level in the coolant expansion reservoir (2) must be positioned at the max. marking.

4

Attach pressure pump on expansion reservoir (2)

 Pressure pump

*450589072100

5

Apply a pressure of a max. 1.6 bar to the cooling system

 Observe pressure gauge for pressure pump.

 Pressure pump

*450589072100

6

Remove interior flap above engine

If a pressure drop was established in the cooling system.

AR88.40-P-1100-03MCC

7

Raise vehicle with vehicle lift

If a pressure drop was established in the cooling system.

8

Remove underfloor paneling

If a pressure drop was established in the cooling system.

9

Check all components of cooling system for leaktightness; establish coolant loss and remove it

If a pressure drop was established in the cooling system.

10

Lower vehicle with vehicle lift

If a pressure drop was established in the cooling system.

11

Disconnect pressure pump on expansion reservoir (2) and check coolant level in expansion reservoir (2); correct if necessary

After removal of the leakage in the cooling system.



Coolant specifications

BB00.40-P-0310-01A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A

 The engine coolant level in the coolant expansion reservoir (2) must be positioned at the max. marking.

 Pressure pump

*450589072100

12

Attach pressure pump to expansion reservoir (2) and apply a pressure of a maximum of 1.6 bar again to the cooling system

After removal of the leakage in the cooling system.

 Observe pressure gauge for pressure pump.

 Pressure pump

*450589072100

13

Raise vehicle with vehicle lift

After removal of the leakage in the cooling system.

14

Install underfloor paneling

After removal of the leakage in the cooling system.

15

Lower vehicle with vehicle lift

After removal of the leakage in the cooling system.

16

Install interior flap above engine

After removal of the leakage in the cooling system.

AR88.40-P-1100-03MCC

17

Disconnect pressure pump on expansion reservoir (2)

 Pressure pump

*450589072100

18

Seal expansion reservoir (2) with cap (1)

19

Install maintenance flap