Type 25 Engine Thermostat - Waterboxer Engines (Opens At 87 Degrees)

Ensure your engine maintains optimal operating temperature with this top-quality replacement thermostat, designed for Volkswagen Type 25 / T3 Buses with both petrol and diesel watercooled engines. This thermostat is suitable for 1.9L and 2.1L petrol engines from 1982 onwards, as well as 1.6L and 1.7L diesel engines produced between April 1984 and November 1992.

This thermostat is engineered to open at 87°C, allowing coolant to circulate to the radiator once the engine reaches its optimal temperature. This helps prevent overheating while improving fuel efficiency and reducing engine wear during cold starts.

Supplied with a rubber O-ring seal, the thermostat ensures a tight, leak-free installation and consistent performance in all driving conditions. It’s a direct-fit replacement that matches the original VW specifications for fit, temperature, and reliability—ideal for both routine maintenance and full engine rebuilds.

Applications:

• VW Type 25 / T3 Petrol Engines (1.9 & 2.1L): 1982–1992

• VW Type 25 / T3 Diesel Engines (1.6 & 1.7L): April 1984 – November 1992