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Home >> Fiat >> 2017 >> 500L Pop >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> 1.4L Turbo Engine (Service Information) - 500L >> Lubrication >> Diagnosis And Testing >> Engine Oil Leak >> Air Leak Detection Test Method

Air Leak Detection Test Method

  1. Disconnect the fresh air make-up hose from the cylinder head cover. Cap or plug the make-up air hose nipple.
  2. Remove the PCV hose from the PCV valve. Cap or plug the PCV valve nipple.
  3. Attach an air hose with a pressure gauge and regulator to the dipstick tube.
    CAUTION:

    Do not subject the engine assembly to more than 20.6 kPa (3 PSI) of test pressure.

  4. Gradually increase air pressure from 7 kPa (1 psi) to 17 kPa (2.5 psi) maximum while applying soapy water at the suspected leak source. Adjust the regulator to a suitable test pressure within this range that provides the best bubble generation which will pinpoint the leak source. If the oil leak is detected and identified, repair per service information.
  5. If no leaks are detected, turn off the air supply and remove the air hose and all plugs and caps. Install the PCV valve and make-up air hoses.
  6. Clean the oil off of the suspect oil leak area using a suitable solvent. Drive the vehicle at various speeds approximately 24 km (15 miles). Inspect the engine for signs of an oil leak by using a black light.
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