Air By-Pass Valve

Remove air by-pass valve. Connect vacuum pump to port "A" of valve. See Fig 1 . Apply 10 in. Hg vacuum to port "A", and blow air into port "B". Replace air by-pass valve if air does not flow from port "B" to port "C".

Fig 1: Testing Air By-Pass & Charge Relief Valves

Courtesy of MAZDA MOTORS CORP.