Remove/install coolant thermostat - AR20.10-P-2460B

ENGINE 112 in MODEL 129, 163, 202, 208, 209.361 /365 /461 /465, 210, 211.061 /261 /065 /265, 220 

ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250 

ENGINE 113 in MODEL 129, 163, 202, 203, 208, 209, 210, 211.070 /270, 220, 230.475 

ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254 

ENGINE 113.982 in MODEL 463.243/246 

ENGINE 113.989 in MODEL 171.473 

Shown on engine 112 

Fig 1: Identifying Coolant Thermostat Components - Shown On Engine 112

	Remove/install
	Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof.	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
1	Open engine hood
	Risk of injury  to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning  caused by 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
2	Drain coolant at radiator (6)	Model 163: For draining coolant, detach bottom coolant line at radiator or at coolant pump.
		Installation:  On model 163 replace radiator connection of hose clamps to coolant hose, otherwise this can cause a damage to the bolt/ thread.
		Model 163	*BA20.20-P-1004-01A
		Collect coolant
		Disposal of coolants: observe legal regulations or local wastewater requirements! Refer to Environmental Protection Catalog issued by MBVD/PWU for locations in Germany.
		Engine 112 in model 220, 208, 211, 163, 210, 129, 202	AR20.00-P-1142HA
		Engine 113 in model 211, 163, 208, 202, 210, 220, 129
		Engine 113.962 in model 463.240 /241 /248 /254 /206 /247 /249
		Engine 112.945 in model 463.233 /244 /209 /232 /245 /250
		Engine 113.982 in model 463.246 /243
		Engine 113.963 in model 230.475	AR20.00-P-1142RVK
		Engine 112.912 in model 209.361 /461	AR20.00-P-1142PV
		Engine 112.955 in model 209.365 /465
		Engine 113.968 in model 209.375 /475
		Engine 113.987 in MODEL 209.376/ 476
		Engine 113.988 in model 203.076/ 276
		Engine 113.989 in model 171.473
	Notes on coolant		AH20.00-N-2080-01A
3	Unclip cover on front side of engine	Model 211, 220
4	Remove engine cover with integrated air filter	Except model 211, 230
		Model 171.473	AR09.10-P-1150AC
		Model 203.076/ 276
		Model 209.376/ 476 as of 24.4.04
		For model 463, 220, 210.074 /274, 208.370 /374 /470, 209.361 /365 /375 /376 /461 /465 /475 /476, 202.033 /093, 129, the air filter is integrated in the engine cover. Remove engine cover or air filter by pulling it vertically up and off the cylinder head covers.
5	Detach coolant hose (5)	Inspect condition of coolant hose (5) and hose clamp (4), replace if necessary.
6	Remove poly-V belt from guide pulley	Model 171.473 with engine 113.989	AR13.22-P-1202PV
7	Unscrew bolts (3), remove coolant thermostat housing (1) with coolant thermostat	The coolant thermostat must not be removed from the housing. Otherwise it will be destroyed. Re-installation is not possible. The housing is supplied together with the coolant thermostat for repair purposes.
		Installation:  Install new sealing ring (2).
		Engine 112	*BA20.10-P-1003-01M
		Engine 113 except 113.987 /988/989 /991	*BA20.10-P-1003-01C
		Engine 113.987 /988/989 /991	*BA20.10-P-1003-01L
8	Install in the reverse order
9	Inspect cooling system for leaks	Model 129, 163, 202, 208, 210, 211, 463	AR20.00-P-1010HA
		Model 220 except 220.074 /174
		Model 171.473	AR20.00-P-1010P
		Model 203.076/ 276
		Model 209 with engine 112, 113
		Model 220.074/174	AR20.00-P-1010RVK
		Model 230.475

RADIATOR, COOLANT HOSES

COOLANT PUMP, COOLANT THERMOSTAT

COOLANT PUMP, COOLANT THERMOSTAT

COOLANT PUMP, COOLANT THERMOSTAT