Engine Oiling System

1987 Pontiac Grand Prix Base, 4.3 Z, 200C/MV9SECTION Engine Oiling System

Oil is supplied under pressure by gear-type pump, driven by distributor, which in turn is driven by helical gear on camshaft. The main oil gallery (along left bank) feeds oil through drilled passages to camshaft and crankshaft to lubricate bearings. The valve lifter oil gallery feeds lifters which, through hollow push rods, feed rocker arms. All other components are lubricated by splash or nozzle.

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.