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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz C-Class (W203, 2000 issue)

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Mercedes-Benz W203
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Mercedes-Benz
W203
Introduction
Instruction Manual
Routine maintenance
Engine
Cooling and heating
Cooling system
Antifreeze - a means of protection against freezing
Changing the coolant - general comments
Removal and replacement of hoses of the cooling system
Removing and installing thermostat
Check thermostat
Check the cooling system pressure
Removing and installing coolant pump
Removal and installation of the fan
Removing and installing radiator
Ventilation systems, heating and air conditioning
The power supply system and release
Electric motor
Manual gearbox
Automatic Transmission
Coupling and power shafts
Brakes
Suspension and steering
Body
Onboard electric
 


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Removing and installing thermostat



The water pump and the thermostat. 4-cylinder gasoline engine 111

1 - Seal the thermostat housing
2 - Cork
3 - Seal
4 - Cover
5 - Bolt M8 25 Nm
6 - Coolant pump
7 - Bolt M8 25 Nm
8 - Bolt, 10Nm
9 - Pulley
10 - Bolt M6 10Nm
11 - Bolt, 10Nm
12 - Cover thermostat
13 - Thermostat
14 - O-ring cover of the thermostat
15 - Gasket water pump
16 - Thermostat Housing
17 - Clamp
18 - Coolant hose
19 - Laying
20 - Clamp

The water pump and the thermostat. Diesel engines

1 - Bolt M6h28, 14Nm
2 - Pulley
3 - Ventilation hose
4 - The coolant pump
5 - Gasket
6 - Impeller
7 - Seal
8 - Gasket
9 - Bolt M6h25, 9Nm
10 - Seal
11 - The sensing element temperature sensor
12 - Clip
13 - The body of the thermostat, the thermostat (+92 ?� C) built
14 - The connecting element between the thermostat housing and the housing allocation mechanism

The illustration shows the thermostat disconnected from the cover of the thermostat. The thermostat is integrated into the cover can be checked and set.

Gas engine

Withdrawal

PERFORMANCE ORDER

The thermostat is integrated in the thermostat and can be replaced only in conjunction with it.


When the engine is hot before opening surge tank cover it with a thick cloth to avoid burns due to exposure to hot coolant and steam. The cover should be removed only when the coolant temperature is below + 90 ?� C.

1. Drain the coolant into a container, as described in Section Replacement of a cooling liquid - general comments.

2. Remove the engine front cover (2) and the left (1).

3. Remove the coolant hoses to the radiator and a broad tank on the cover of the thermostat. Pre-release clamps and slide them all the way back.
4. Remove thermostat cover and remove it along with the thermostat.

Thermostat and thermostat cover form a single unit. When removing the thermostat may be damaged and may not be followed by the installation.

5. Remove the thermostat housing gasket and clean sealing surfaces.

Setting

PERFORMANCE ORDER

1. Install the new O-ring, cover the thermostat with the thermostat and fix torque 10Nm.
2. Attach the coolant hoses for connecting fittings and tighten clamps.

At the same time check the condition of hoses and clamps, and replace if necessary.

3. Replace the front and the left engine cover.

Diesel engine

It describes only differences from the gasoline engine.

PERFORMANCE ORDER

1. Disconnect the connector of the sensor temperature (14).
2. Disconnect the fuel holder from the thermostat housing.
3. Disconnect the coolant hoses and breather hose (1) from the thermostat housing (1).
4. Remove the thermostat housing (12). Tightening torque 9Nm.





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Removal and replacement of hoses of the cooling system
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Check thermostat

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