Diesel engine 12V 4000 G73, 16V 4000 G73. Manual - part 31

7.15.7 Coolant filter – Replacement

Preconditions

☑ Engine is stopped and starting disabled.

Special tools, Material, Spare parts

Designation / Use

Part No.

Qty.

Filter wrench

F30379104

1

Engine oil
Coolant filter

(→ Spare Parts Catalog)

WARNING

Coolant is hot and under pressure.

Risk of injury and scalding!

• Let the engine cool down.

• Wear protective clothing, gloves, and goggles / safety mask.

Coolant filter – Replacement

1.

Close shut-off cocks (1).

2.

Remove coolant filter (2) with filter wrench.

3.

Clean sealing surface on connecting piece.

4.

Coat seal on new coolant filter with engine

oil.

5.

Screw on coolant filter and tighten hand-

tight.

6.

Open shut-off cocks (1).

7.16 Low-Temperature Circuit

7.16.1 Charge-air coolant – Level check

Preconditions

☑ Engine is stopped and starting disabled.
☑ MTU Fluids and Lubricants Specifications (A001061/..) are available.

WARNING

Coolant is hot and under pressure.

Risk of injury and scalding!

• Let the engine cool down.

• Wear protective clothing, gloves, and goggles / safety mask.

Checking charge-air coolant level

at filler neck:

1.

Turn breather valve on coolant expansion

tank counterclockwise to the first stop and

allow pressure to escape.

2.

Continue to turn breather valve counter‐

clockwise and remove.

3.

Check coolant level (coolant must be visible

at marking plate).

4.

Top up coolant if necessary (→ Page 129).

5.

Check proper condition of breather valve,

clean sealing faces if required.

6.

Fit breather valve and close it.

Checking charge-air coolant level by means of level sensor:

1.

Switch on engine control system and check display (coolant level is automatically monitored by engine

control system).

2.

Top up coolant if necessary (→ Page 129).

TIM-ID: 0000000042 - 006

7.16.2 Charge-air coolant – Change

Special tools, Material, Spare parts

Designation / Use

Part No.

Qty.

Charge-air coolant

Charge-air coolant – Change

1.

Drain charge-air coolant (→ Page 128).

2.

Fill with charge-air coolant (→ Page 129).

7.16.3 Charge-air coolant – Draining

Preconditions

☑ Engine is stopped and starting disabled.

Special tools, Material, Spare parts

Designation / Use

Part No.

Qty.

Sealing ring

(→ Spare Parts Catalog)

WARNING

Coolant is hot and under pressure.

Risk of injury and scalding!

• Let the engine cool down.

• Wear protective clothing, gloves, and goggles / safety mask.

Draining charge-air coolant

1.

Provide an appropriate container to drain

the coolant into.

2.

Turn breather valve of filler neck on coolant

expansion tank counterclockwise to first

stop and allow pressure to escape.

3.

Continue to turn breather valve counter‐

clockwise and remove.

4.

Draw off precipitated corrosion inhibitor oil

from the expansion tank through filler neck.

5.

Open drain valves and drain plugs and

drain coolant at the following points:

• Charge-air coolant pump

• Thermostat housing

6.

Draining of residual coolant:

• Intercooler

7.

Close all drain valves and install drain plugs

with new sealing rings.

8.

Set breather valve onto filler neck and close

it.

TIM-ID: 0000014855 - 001