Remove/install low-temperature circuit valve

AR20.00-S-1048PD

Remove/install low-temperature circuit valve

09.12.2019

Engine

699.300/301/302/303 in model 470, 471

1

Hose

2

Screw

3

Valve

 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

 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

 

Remove/install

1

Remove cap of the coolant expansion reservoir.

 Initially, unscrew cap of the coolant expansion reservoir counterclockwise as far as the safety catch and then relieve overpressure. Then, remove cap.

2

Remove starter.

AR15.30-S-7100PD

 Except code Y1J (Underguard)
Installation: Only install rear and center lower rear engine compartment paneling again after a leak test.

 With code Y1J (Underguard)
Installation: Install center underbody protection only after the leak test.

3

Disconnect hoses (1).

 Clamp

*000589543700

4

Remove hoses (1) from valve (3).

 To do this, release clamps and detach hoses (1).
Seal connections to valve (3).
Collect coolant which flows out.

 Commercially available devices/tools
Collecting pan

 Installation: Check whether clamps can be reused.

 Set of protective covers

*001589019100

 Hose clamp pliers

*454589003700

If one or more clamps cannot be reused:



replace affected clamps.

5

Remove valve (3).

 To do this, remove screws (2).

 M6

*BA00.10-N-1002-01A

6

Install in the reverse order.

7

Purge engine cooling system.

AR20.00-S-1142-03P

 Coolant

*BF20.00-N-1001-01PD

 Cooler vacuum filling device

*285589002100

 Adapter

*454589009100



Check

 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

8

Check valve (3) for leak tightness while engine is running.

 Visual inspection only.

 Headless screws/bolts: screws/bolts and nuts, coarse-pitch thread

Number

Designation

8.8

10.9

BA00.10-N-1002-01A

M6

Galvanized

Nm

9

13

Phosphated

Nm

9

12

 Headless screws/bolts: screws/bolts and nuts, coarse-pitch thread

Number

Designation

12.9

BA00.10-N-1002-01A

M6

Galvanized

Nm

16

Phosphated

Nm

14

 Filling capacity for engine cooling system

Number

Designation

Engine 699 in model 470, 471

BF20.00-N-1001-01PD

Coolant

Liter

 11,1

Sheet

BB00.40-P-0325-07A