Piston Rings

1993 Chevrolet Forward Control 7.4 NSECTION Piston Rings

Measure piston ring end gap and side clearance. If not within specification, replace piston and/or rings as necessary. See PISTONS, PINS & RINGS SPECIFICATIONSΒ  table under ENGINE SPECIFICATIONS. Install rings with a mark on ring facing upward. Position ring end gaps on piston. See Fig 1.

Fig 1: Positioning Piston Ring End Gaps
G71630Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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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.