2000 Saturn SC2 Automatic, MP6FACTORY OEM SERVICE PROCEDURE

Compression Check

TOOLS REQUIRED:  SA9127E Gauge Bar Set

If there is lack of power, excessive oil consumption, or poor fuel economy, etc., measure the compression pressure.

CAUTION: COMPRESSION CHECKS MUST BE PERFORMED WITH THE VEHICLE IN PARK OR NEUTRAL AND PARKING BRAKE APPLIED.
  1. Start the engine and allow it to reach normal operating temperature.
  2. Shut engine off and disconnect the ignition module connector.
    Fig 1: Ignition Module Connector
    G01068357Courtesy of GENERAL MOTORS CORP.
  3. Disconnect spark plug wires and remove all four spark plugs.
  4. Insert a compression Gauge Bar Set SA9127E into the spark plug hole.
  5. Fully open throttle.
    Fig 2: Cylinder Pressure Specifications
    G01068356Courtesy of GENERAL MOTORS CORP.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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