Checking Vacuum Valve In Cap
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
Screw cap (1) onto special tool 17 0 007 and connect to vacuum hose of vacuum pump.
Feed vacuum pump with battery positive voltage.
Slowly apply partial vacuum to cap.
Compare opening pressure of vacuum valve.
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