Engine Unit (For Sedan) Inspection

Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Mechanical. Yaris. Ncp93, 131

  1. INSPECT CHAIN SUB-ASSEMBLY

  2. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY

  3. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

  4. INSPECT CAMSHAFT TIMING SPROCKET

  5. INSPECT CHAIN TENSIONER SLIPPER

  6. INSPECT NO. 1 CHAIN VIBRATION DAMPER

  7. INSPECT CYLINDER HEAD SET BOLT

Engine Unit (For Sedan) -- Inspection



1. INSPECT CHAIN SUB-ASSEMBLY


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Using a spring scale, apply 140 N (14.3 kgf, 31.5 lb) to the timing chain and measure its length.

    Maximum chain elongation:
    123.2 mm (4.850 in.)
    If the elongation is greater than the maximum, replace the chain.
    HINT:
    Perform the same measurement at 3 or more random places and calculate the average length.


2. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Check that the plunger moves smoothly when the ratchet pawl is raised with your finger.

  1. Release the ratchet pawl and check that the plunger is locked in place by the ratchet pawl and does not move when pushed with your finger.



3. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Wrap the chain around the timing sprocket.

  1. Using vernier calipers, measure the diameter of the timing gear with the chain.

    Minimum gear diameter (with chain):
    96.2 mm (3.787 in.)
    If the diameter is less than the minimum, replace the camshaft timing gear.
    NOTICE:
    Make sure that the vernier calipers are in contact with the chain link when measuring.


4. INSPECT CAMSHAFT TIMING SPROCKET


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Wrap the chain around the timing sprocket.

  1. Using vernier calipers, measure the diameter of the timing gear with the chain.

    Minimum gear diameter (with chain):
    96.2 mm (3.787 in.)
    If the diameter is less than the minimum, replace the camshaft timing sprocket.
    NOTICE:
    Make sure that the vernier calipers are in contact with the chain link when measuring.


5. INSPECT CHAIN TENSIONER SLIPPER


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Check the chain tensioner slipper.

    Minimum thickness:
    1.0 mm (0.039 in.)
    If the thickness is less than the minimum, replace the chain tensioner slipper.


6. INSPECT NO. 1 CHAIN VIBRATION DAMPER


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Check the vibration damper.

    Minimum thickness:
    1.0 mm (0.039 in.)
    If the thickness is less than the minimum, replace the chain vibration damper.


7. INSPECT CYLINDER HEAD SET BOLT


Yaris. Ncp93, 131.1Nz-Fe Engine Mechanical.Engine (For Sedan).Engine Unit (For Sedan) Inspection

  1. Using vernier calipers, measure the length of head bolts from the seat to the end.

    Standard length:
    143.5 mm (5.6496 in.)
    Maximum length:
    144.2 mm (5.6772 in.)
    If the length is greater than the maximum, replace the bolt.