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Valves used to bleed air from drum brakes, available in sets of 4

a screw used to bleed air from a heating system

Caps for bleeding brake fluid from the system

a tool used to remove air from the brake system

The process of removing air or gas from a hydraulic system, such as the hydraulic valve lifter

Valve used to remove air from the cooling system

To remove air from the cooling system to prevent damage

A device or mechanism that generates a vacuum, used for various purposes such as bleeding the cooling system.

The pressurized tank in the water-cooled Vanagon cooling circuit that accommodates coolant expansion and provides a fill and bleed point. It is separate from the low-pressure coolant refill reservoir; the names are sometimes confused in parts listings.

The electronic control unit (ECU) is part of Volkswagen’s Digifant fuel-injection and engine-management system. Gerry’s 1986–1991 technical bulletin index distinguishes these applications from the earlier Digijet years. In a January 1999 list thread, an owner of a 1986 Westfalia reported that the engine quit after cooling-system bleeding and asked whether fuel starvation or a failed Digifant component was involved; the thread records a troubleshooting question, not a confirmed diagnosis. Check engine code and market before identifying an ECU.