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Removal of Belt and Thermostat

Model: Audi A4 B5 - Years 1994-2000
Part: Thermostat

The following operations must be performed with the engine cold. This job requires some time, patience, and good manual skills.
The first step is to drain the cooling system, then move to the radiator by disconnecting the fan connector. Next, remove the front wheel on the driver's side and take off the plastic inside the wheel well to access the radiator and disconnect the lower hose. The next step is to remove the power steering belt. If you look at the engine, under the thermostat, there is a black pulley with nuts that need to be loosened. If you have difficulty removing the belt, just remove the water pump pulley and everything will come off. Then, remove the thermostat housing and disconnect the hoses that come from under the thermostat housing. Next, disconnect the electrical connector from above the thermostat and remove the bolt that secures the electrical wires. Put the car in first gear to prevent the engine from turning, remove the two plastic covers over the belt tensioners, and you can start to remove it.

Updated on 9 February 2026 by ScegliAuto

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