1966 Chevrolet Corvair Base, Not Available TransFACTORY OEM SERVICE PROCEDURE

High Oil Consumption

NOTE: Piston type vacuum pumps require some oil for piston and cylinder wall lubrication and oil traces do not indicate a defective pump. Sudden increase in oil consumption may indicate a defective pump.

To test for excessive oil consumption, install a 2" glass blown type fuel filter (with filter element removed) in vacuum pump outlet line. An accumulation of 1/4" of oil in the bowl after 25 miles of operation indicates a defective pump.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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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