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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Timing System (PHEV) >> Timing Chain >> Repair Procedures >> Installation

Repair Procedures: Installation

  1. The TDC marks of the intake and exhaust CVVT sprockets are slightly turned from the TDC position as shown when the timing chain is removed.
    G12353068Courtesy of KIA MOTORS AMERICA, INC.
  2. Turn the crankshaft clockwise (about 2 - 3 pitches) from the TDC position (the dowel pin (A) of crankshaft is about 3° with the engine vertical line) as rotation of the intake CVVT sprocket from the TDC position.
    G12353069Courtesy of KIA MOTORS AMERICA, INC.
  3. Install the timing chain guide (A).

    Tightening Torque: 

    18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb.ft)

    G12353070Courtesy of KIA MOTORS AMERICA, INC.
  4. Install the timing chain tensioner arm (A).

    Tightening Torque: 

    18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb.ft)

    G12353071Courtesy of KIA MOTORS AMERICA, INC.
  5. Install the timing chain.

    Crankshaft sprocket (A) → Timing chain guide (B) → Intake CVVT sprocket (C) → Exhaust CVVT sprocket (D)

    1. Install the timing chain with no slack between the crankshaft sprocket and the intake CVVT sprocket.
      G12353072Courtesy of KIA MOTORS AMERICA, INC.
      NOTE: The timing marks of each sprocket should be matched with timing marks (color link) of timing chain when installing the timing chain.
    2. Install the timing chain on the exhaust CVVT sprocket with no slack while turning the CVVT assembly clockwise.
    G12353073Courtesy of KIA MOTORS AMERICA, INC.
    NOTE:
    • The timing mark of the exhaust CVVT sprocket should be matched with timing mark (color link) of timing chain when installing the timing chain.
    • Press down the timing chain links on the exhaust CVVT sprocket to prevent the sprocket from spinning.
  6. Install the timing chain auto tensioner (A) and remove the stopper pin (B).

    Tightening Torque: 

    9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

    G12353074Courtesy of KIA MOTORS AMERICA, INC.
    NOTE:
    • When reinstalling the tensioner, check the ratchet function of the tensioner after removing the fixing pin by retracting the tensioner arm (A) to the maximum as shown below.
    • When retracted to the maximum, there should be no interference between the tensioner arm (A) and tensioner housing (B).
    G12353075Courtesy of KIA MOTORS AMERICA, INC.
  7. After rotating crankshaft 2 revolutions in regular direction (clockwise viewed from front), confirm that the TDC marks on the intake and exhaust CVVT sprockets are aligned with the top surface of cylinder head.
    G12353076Courtesy of KIA MOTORS AMERICA, INC.
  8. Install the timing chain cover.

    (Refer to Timing System - "TIMING CHAIN COVER ")

  9. Install the cylinder head cover.

    (Refer to Cylinder Head Assembly - "CYLINDER HEAD COVER ")

  10. Add all the necessary fluids and check for leaks. Connect KDS/GDS. Check for codes, note, and clear. Recheck.
    NOTE:
    • Refill engine with engine oil.
    • Clean battery posts and cable terminals and assemble (12 Volt only).
    • Inspect for fuel leakage.
    • After assembling the fuel line, switch on the ignition (without operating the starter) so that the fuel pump runs for approximately two seconds and fuel line pressurizes.
    • Repeat this operation two to three times, then check for fuel leakage at any point in the fuel line.
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