Connection Diagram - Coolant Hoses
WARNING:
Risk of scalding due to hot steam and hot coolant.
- The coolant system is under pressure when the engine is warm.
- Cover the coolant reservoir cap with a cloth and then open it slowly to release the pressure.
NOTE:
Secure all hose connections with hose clamps of the same type as those equipped by the factory .
The arrows on the coolant pipes and ends of coolant hoses must align.
Vehicles without Auxiliary Heater
NOTE:
The arrows show the coolant flow direction.
- Radiator
- Change the coolant after replacing
- Coolant Pump
- Engine Coolant Temperature Sensor -G62-
- Coolant Thermostat
- Coolant Recirculation Pump -V50-
- Activated by the Recirculation Pump Relay -J160-
- Removing and installing, refer to COMPONENT GROUP "3" .
- Cylinder Head and Cylinder Block
- Change the coolant after replacing
- Coolant Shut-Off Valve
- Is activated by the Climatronic Refrigerant Shut-Off Valve -N422-
- The Climatronic Refrigerant Shut-Off Valve -N422- is activated by the Climatronic Control Module -J255-.
- Removing and installing, refer to COMPONENT GROUP "1" .
- Bleeder Hole
- Heater Core for Heater
- Removing and installing, refer to HEATER CORE, REMOVING AND INSTALLING .
- Change the coolant after replacing
- Coolant Reservoir Cap
- Checking the pressure relief valve, refer to COOLING SYSTEM, CHECKING FOR LEAKS - "Pressure Relief Valve in Cap, Checking" (See Figure).
- Coolant Expansion Tank
- Engine Oil Cooler
- Change the coolant after replacing
- After-Run Coolant Pump -V51-
- Vehicles for countries with warm climates
- Check Valve
- Check Valve
Vehicles with Parking Heater
NOTE:
The arrows show the coolant flow direction.
- Radiator
- Change the coolant after replacing
- Coolant Pump
- Engine Coolant Temperature Sensor -G62-
- Coolant Thermostat
- Parking Heater
- With Recirculation Pump -V55-
- Removing and installing, refer to COMPONENT GROUP "3"
.
For vehicles with a "parking heater", the Recirculation Pump -V55- assumes the function of the Coolant Recirculation Pump -V50- (the Water Pump -V36-).
- Cylinder Head and Cylinder Block
- Change the coolant after replacing
- Climatronic Refrigerant Shut-Off Valve -N422-
- Removing and installing, refer to COMPONENT GROUP "1" .
- Bleeder Hole
- Heater Core for Heater
- Removing and installing, refer to HEATER CORE, REMOVING AND INSTALLING .
- Change the coolant after replacing
- Coolant Reservoir Cap
- Checking the pressure relief valve, refer to COOLING SYSTEM, CHECKING FOR LEAKS - "Pressure Relief Valve in Cap, Checking" (See Figure).
- Coolant Expansion Tank
- Engine Oil Cooler
- Change the coolant after replacing
- After-Run Coolant Pump -V51-
- Vehicles for countries with warm climates
- Check Valve
- Check Valve