Engine Oiling System

1986 Pontiac 6000 Base, 2D Coupe, 2.5 RSECTION Engine Oiling System

When engine is started, the oil pump draws oil from the pan, pumps it through the filter and into passage along right side of the block where it intersects lifter bosses. Oil is then routed to camshaft and crankshaft bearings through smaller drilled passages.

Oil is pumped through push rods to the rocker arms as supplied by hydraulic lifters. By-pass valves are located in the pick-up screen, oil filter mounting and oil pump. Oil returns to the pan through return holes in head and block.

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.