How to Remove Air From the Coolant System of a 2000 VW Diesel
- 1). Open the radiator cap located on the top of the radiator by turning it counterclockwise. This relieves pressure on the Volkswagen's coolant system.
- 2). Crank the Volkswagen's engine, shift the transmission into neutral and set the parking brake.
- 3). Turn the heater on to full heat. Turn on the defrost and set the blower on the highest setting. This circulates coolant through the engine and through the heater core.
- 4). Run the engine for five minutes. As the coolant flows through the coolant system, it purges the air out of the radiator.
- 5). Stop the engine and check the fluid levels in the radiator. Often, when you purge air, you must add a small amount of fluid to top off the radiator. If necessary, top off the radiator with a 50/50 mix of coolant and distilled water then repeat Steps 2 through 4.
- 6). Place the cap back on the radiator.