Engine Oiling System

1985 Chevrolet Step Van P20, 5.7 M, Automatic, 475/M40SECTION Engine Oiling System

Full pressure lubrication through a full flow oil filter and oil cooler is supplied by a gear-type oil pump. Main oil gallery feeds oil through drilled passages to camshaft and crankshaft to lubricate bearings. Valve lifter gallery feeds the valve lifters, which feed the rocker arms through hollow push rods.

RENDER: 1.0x

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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.