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Compression Test

WARNING: This page is about a different variant/trim than selected.
Fig 1: Fuel Injector Clamp, Compression Test Adapter & Bolt
GC0146804Courtesy of CHRYSLER GROUP, LLC
  1. Warm up engine to operating temperature (approximately 80 °C, 176 °F).
  2. Shut off engine.
  3. Disable the low pressure fuel pump.
  4. Remove the fuel injector. Refer to INJECTOR(S), FUEL, REMOVAL .
  5. Crank engine several times with the starter to eliminate combustion residues in the cylinders.
  6. Insert the (special tool #VM.10357, Adapter, Compression Test) (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.
    Cylinder Compression Difference Between Cylinders  5 Bar (73 psi) 
  8. Carry out test procedure at the remaining cylinders in the same way.
  9. Remove the (special tool #VM.10357, Adapter, Compression Test) from cylinder head.
  10. Install the fuel injector. Refer to INJECTOR(S), FUEL, INSTALLATION .
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