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Home >> Jeep >> 2023 >> Gladiator Freedom, Part Time T/Case Control >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (3.0L Engine (Service Information) (1 Of 4)) >> Diagnosis And Testing >> Cylinder Compression Test

Cylinder Compression Test

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GC0210370Courtesy of CHRYSLER GROUP, LLC
  1. Warm up the engine to operating temperature (approximately 80 °C, 176 °F).
  2. Shut the engine off.
  3. Disable the low pressure fuel pump.
  4. Remove the fuel injector. Refer to: INJECTOR(S), FUEL, REMOVAL AND INSTALLATION, 3.0L Engine .
  5. Crank the engine several times with the starter to eliminate combustion residues in the cylinders.
  6. Insert the Special Tool # VM.10357, (Compression Test Adapter) (3) into fuel injector hole of cylinder to be tested. Install fuel injector clamp (1), bolt (2) and securely tighten.
  7. Test compression pressure by cranking engine with starter for at least 8 revolutions.
    DESCRIPTION SPECIFICATION DIFFERENCE BETWEEN CYLINDERS
    Cylinder Compression 21 - 25 Bar (304 - 362 psi) 5 Bar (73 psi)
  8. Carry out the test procedure at the remaining cylinders in the same way.
  9. Remove the Special Tool # VM.10357, (Compression Test Adapter) from cylinder head.
  10. Install the fuel injector. Refer to INJECTOR(S), FUEL, REMOVAL AND INSTALLATION, 3.0L Engine .
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