# 20 Cooling System - OM617 turbo

> Cooling system

- 20-005 - Coolant circuit and engine cooling

> Cooling thermostat

- 20-010 - Draining and filling-in of coolant - antifreeze table
- 20-015 - Cleaning cooling system
- 20-110 - Removal and installation of coolant thermostat

> Coolant pump

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

> Fan coupling

- 20-310 - Viscofan coupling, temperature-controlled

> Radiator

- 20-420 - Removal and installation of radiator
- 20-425 - Reconditioning of radiator
- 20-430 - Checking of expansion tank closing cover
- 20-490 - Illustrated table 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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