Thermostat VR6 engine
Fig. 193. Part of the thermostat housing and the thermostat: 1 - the thermostat; 2 - a bolt with hexagon 10 Nm; 3 - the thermostat; 4 - a cover of the thermostat; 5 - a bolt with hexagon 10 Nm; 6 - O-shaped sealing ring; 7 - housing cover; 8 - temperature switch (off the air conditioning and the third stage of the fan), black; 9 - the temperature sensor injection system Motronic, blue; 10 - temperature sensor switching the fan of the cooling of the engine after stopping, yellow; 11 - a collar
Thermostat 3 (Fig. 193)
is located in a separate building thermostat 1, which in addition to the thermostat are two temperature sensors: 9 sensor and coolant temperature sensor 10 incorporating the cooling fan with the engine off.
Several unusual mount three temperature sensors in the thermostat housing. They are not bolted and mounted spring clamp that must be disclosed by means of a screwdriver, in the case of removal of sensors. Temperature sensors have O-shaped sealing ring, to help ensure the required tightness. Plug pads if they are disconnected, can not be confused, since they are of different colors; from the coolant temperature sensor two-pin connector, while the gauge of inclusion of the fan of the cooling system with the engine off -, four-connector.
The thermostat is located under the lid 4 (on which the hose is attached) with O-shaped sealing ring 6.
Removing the thermostat VR6 engine was performed as follows:
- Open the lid of the expansion tank;
- Drain the cooling liquid at least to the level of the thermostat (about 4 liters of coolant);
- Disconnect the hose from the thermostat cover and remove the cover;
- Remove the thermostat.
The thermostat can not be repaired, and so the problem should be changed.
Verifying thermostat in exactly the same way as for the thermostat 2.0-liter engine. Faulty thermostat should be replaced.
When the thermostat:
- Use a new O-ring;
- Check the hose clamp, before it again tighten the hose;
- Pour coolant in the cooling system.
If the details were taken from the body of the thermostat, then when they are installed, follow these instructions:
- Set the thermostat housing with a new O-ring on the motor and tighten the long bolts 2 (the top. See fig. 193)
to 10 Nm;
- If you were removing the cover of the housing 7 and the coolant piping, be sure to replace the O-rings. Pipeline coolant insert firmly into the lid and tighten the fastening bolts 2 (below, see. Fig. 193)
of the lid to 10 Nm;
- If the temperature sensors were removed 9 and 10, set a new O-ring seal, insert the appropriate sensor and push on him a spring clip;
The spring clip must sit firmly, otherwise the connection is tight.
- If the pipe was withdrawn coolant, both ends of the pipe should establish new sealing rings.