# 20 Engine Cooling - OM616

> Cooling system

- 20-005 - Coolant circuit and engine cooling
- 20-010 - Draining and filling-in of coolant Anti-freeze table
- 20-015 - Cleaning the cooling system

> Thermostat

- 20-110 - Removal and installation of thermostat

> Water pump

- 20-210 - Removal and installation of water pump
- 20-220 - Reconditioning of water pump
- 20-225 - Sealing of water pump
- 20-230 - Removal and installation of water pump housing

> Fan coupling

- 20-310 - Viscofan coupling, temperature-controlled (engine 617)

> Radiator

- 20-420 - Removal and installation of radiator
- 20-425 - Reconditioning of radiator
- 20-430 - Checking radiator cap

> Layout of thermostat

- 20-490 - Thermostat layout

> More information

- Oil in cooling system? Use Alkaline cleaner, disodiumtrixosilicate-pentahydrate.
  - Part number is 001 986 21 71 (500 grams)
- Scale in cooling system? Use Citric Acid at 100 grams per liter.
  - Part number is 000 989 10 25 (500 grams)
- Cooling System Diagnostic

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