Map Controlled Engine Cooling Thermostat F265 , checking

WARNING: This page is about a different car, the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Identifying Connector Test Set V.A.G 1594 C

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connector test set V.A.G 1594C

Remove Map Controlled Engine Cooling Thermostat F265 → Map Controlled Engine Cooling Thermostat F265 , removing and installing .

NOTE:

How to drain coolant → Cooling system, draining and filling .
Always replace gaskets and seals.
How to fill coolant → Cooling system, draining and filling .

Fig 2: Checking Thermostat When Cold

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check thermostat when cold: Large valve plat must seal all around against connection flange.

If this is not the case:

Replace Map Controlled Engine Cooling Thermostat F265.

Fig 3: Connecting Contacts On Map Controlled Engine Cooling Thermostat F265 To Battery With Adapter Leads From Connector Set V.A.G 1594C

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect contacts on Map Controlled Engine Cooling Thermostat F265 to battery with adapter leads from Connector Set V.A.G 1594C. Carefully insert it perpendicular to flange in a pot with hot coolant (mixture ratio: 50% G12+) using pliers.

CAUTION: Metal parts of thermostat must not be touched because they get hot. Risk of burning!

The heating element also warms the wax in thermostat.

Observe whether minimum range of 7 mm - arrows - is reached after 10 minutes.

If range of 7 mm is reached:

Disconnect voltage supply to battery.

NOTE:

This test should not be performed in air. Damage to the expanding material element cannot be prevented!

If minimum range is not achieved:

Replace Map Controlled Engine Cooling Thermostat F265.