Remove grease and scale in the cooling system

AR20.00-B-1030D

Remove grease and scale in the cooling system

12.02.16



Degreasing measures for the cooling system are recommended in case of coolant contamination by engine oil.



If engine overheating tendencies are observed for no apparent reason, a descaling and chemical stripping procedure is recommended.

Before descaling and chemically stripping the system, coolant degreasing is required, even if there are no signs of contamination by lubrication oil.

Danger!

Risk of burning due to high coolant temperatures.

Do not remove expansion tank filler cap at system temperatures above 90 °C. Should it be absolutely necessary to remove the filler cap at engine temperatures in excess of 50 degrees, proceed with utmost care to avoid accidents. Cover the filler cap with a thick cloth, turn it to 1st stage and let the steam leave the system, then remove the filler cap. Wear protective clothing.

AS20.00-B-0001-01A

1

Remove filler cap (1) from expansion tank.

Danger!

Risk of burning.

To drain the cooling system, coolant temperature must be below 50 oC.

2

Remove all drain plugs from engine block (2) and radiator (4) and drain engine coolant.

If vehicle is equipped with heating system, adjust heating control to "open".

After complete coolant draining, replace engine block and radiator drain plugs.

 Discard coolant ecologically.

AP20.00-B-2080-01G

Degreasing

3

Fill the cooling system completely with degreasing solution.

 Degreasing solution:

Clean water and 5% degreasing agent (50 g degreasing agent plus 950 g of water per liter).

*BR00.45-B-1003-04A

 Do not use soda (sodium hydroxide) or any other highly alkaline substance. These products will corrode aluminum components in the cooling system.

Danger!

Risk of personal and material damage when starting the engine with the transmission in gear. Personal risk while working on a hot and running engine.

Always make sure that the transmission is in neutral.

Wear adequate clothing and beware of hot and moving engine components.

AS00.00-B-0005-01A

4

Run engine at moderate engine speed to reach working temperature and maintain working temperature for 20 minutes.

If necessary, cover the radiator to control the required temperature.

5

Remove all drain plugs from engine block (2) and radiator (4) and drain the degreasing solution.

 Stop engine before draining and wait for temperature to drop to 50 oC. After complete draining of the solution, replace all drain plugs.

 Discard degreasing solution ecologically.

AP20.00-B-2080-01G

6

Immediately refill cooling system with clean water and run engine to working temperature which is to be maintained for 5 minutes.

 Stop engine and wait for temperature do drop to 50 oC. Drain cooling system again, refill with clean water and run engine at working temperature for another 5 minutes.

7

Stop engine and drain cooling system completely.

 Drain cooling system as soon as temperature drops to less than 50 oC.

Replace all drain plugs.

AP20.00-B-2080-01G

Descaling and chemical stripping

8

Fill cooling system with descaling/chemical stripping solution.

 Descaling solution:

Clean water and 10% citric acid (100 cc citric acid plus 900 g of water per liter).

*BR00.45-B-1004-04A

9

Run engine to reach working temperature and maintain working temperature for 5 minutes.

If necessary, cover the radiator to control the required temperature.

10

Remove all drain plugs from engine block (2) and radiator (4) and drain the solution.

 Stop engine before draining and wait for temperature to drop to 50 oC. After complete draining of the solution, replace all drain plugs.

 Discard the solution ecologically.

AP20.00-B-2080-01G

11

Refill cooling system with clean water and run engine to working temperature which is to be maintained for 5 minutes.

 Stop engine and wait for temperature do drop to 50 oC and drain the system.

 This operation (11) is to be performed three times.



Instructions on engine coolant.

AH20.00-B-2080-01A

12

Fill engine cooling system.

AP20.00-B-2080F

Número

Denominação

Número de pedido

BR00.45-B-1003-04A

Degreasing

P3 AL 580 E

BR00.45-B-1004-04A

Deep cleaner

Citric acid