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Home >> Mitsubishi >> 2010 >> Lancer ES, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Cooling -- Lancer Evolution) >> Engine Cooling Diagnosis >> Symptom Procedures >> Inspection Procedure 1: Coolant Leak >> Diagnosis

Inspection Procedure 1: Coolant Leak: Diagnosis

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  1. STEP 1. Check for coolant leaks. 
    WARNING: When pressure testing the cooling system, slowly release cooling system pressure to avoid getting burned by hot coolant.
    CAUTION:
    • Be sure to completely clean away any moisture from the places checked.
    • When the tester is removed, be careful not to spill any coolant.
    • When installing and removing the tester and when testing, be careful not to deform the filler neck of the radiator.

    Check that the coolant level is up to the filler neck. Install a radiator tester and apply 160 kPa (23 psi) pressure, and then check for leakage from the radiator hose or connections.

    Q: Is leakage present from the radiator hose or connections? 

    1. YES:  Repair or replace the appropriate part, then go to Step 2.
    2. NO:  There is no action to be taken.
      Fig 1: Checking For Leakage From Radiator Hose Or Connections Using Radiator Tester
      G05375345Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Retest the system. 

    Q: It there still coolant leakage? 

    1. YES:  Return to Step  1.
    2. NO:  The procedure is complete.