1972 Chevrolet Caprice 4D Hardtop, 5.7L Eng VIN K, Not Available TransFACTORY OEM SERVICE PROCEDURE

Vacuum Valve

Identify vacuum hoses connected to side ports on valve to ensure correct reassembly, then disconnect two outer hoses from valve and disconnect center hose at transducer end. Loosen two vacuum valve retaining studs and lift valve off with valve drive arm (disengage arm from vacuum motor mechanism boss). When installing valve, make certain that valve spring is in place.

Fig 1: Vacuum Valve
G09311781Courtesy of GENERAL MOTORS COMPANY
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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