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Relays and Modules - Cooling System > < Heater Core on Driver-Side|Page 1840

A8 Quattro Sedan V8-4.2L (AUX) (2001)

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Radiator Cap: Testing and Inspection

Pressure relief valve in filler cap, checking

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Install filler cap on tester.

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Build up pressure with hand pump.
Pressure relief valve must open at 1.2 to 1.5 bar. 

Relays and Modules - Cooling System > < Heater Core on Driver-Side|Page 1840