Removing and installing thermostat

⇒ 2.6.1 Removing and installing thermostat for main coolant circuit (radiator)

⇒ 2.6.2 Removing and installing thermostat for cylinder block coolant circuit

2.6.1 Removing and installing thermostat for main coolant circuit (radiator)

Special tools and workshop equipment required

• Spring-type clip pliers - VAS 6362-

• Special wrench - T10508-
• Release tool - T10527-
• Release tool - T10527/1-

Removing

• Drain coolant ⇒ 1.3 Draining and adding coolant.

• Remove air pipe ⇒ 2.5 Removing and installing air intake pipe.

• Release hose clip -4- and detach coolant hose -3-.
• Remove bolts -arrows- and detach cover -2- from thermostat housing.

• Remove thermostat using special wrench - T10508-.
• Slightly push down special wrench - T10508- and turn it in -direction of arrow- while doing so.

Installing

Install in reverse order of removal. The following should be observed:

• Insert thermostat ensuring that the centring pin of thermostat is seated in guide -arrow-.

• Install thermostat using special wrench - T10508-.
• Slightly push down special wrench - T10508- and turn it to stop in -direction of arrow- while doing so.

Install in reverse order of removal, observing the following:

• Moisten gasket with coolant.
• Add coolant ⇒ 1.3 Draining and adding coolant.

Torque settings

• ⇒ Fig. ““Cover for thermostat to thermostat housing - specified torque and tightening sequence”“, page 234

2.6.2 Removing and installing thermostat for cylinder block coolant circuit

Removing

• Remove coolant pump ⇒ 2.5 Removing and installing coolant pump.

• Unscrew bolts in the sequence -F to A-.
• Detach coolant pump from thermostat housing.

• Detach thermostat -2- from coolant pump -1-.

Installing

Install in reverse order of removal. The following should be observed:

• Moisten gasket with coolant.

• Fit thermostat housing onto coolant pump.

• Centring pins on thermostat must be fitted in guides -arrowson coolant pump.

• Tighten bolts for thermostat housing ⇒ 2.1 Assembly overview - coolant pump, thermostat.
• Install coolant pump ⇒ 2.5 Removing and installing coolant pump.
• Add coolant ⇒ 1.3 Draining and adding coolant.

Torque settings

• ⇒ Fig. ““Thermostat housing to coolant pump - specified torque and tightening sequence”“, page 234