INSPECTION


TIMING BELT AUTO-TENSIONER ADJUSTER CHECK
1.Check for oil leak from seal, and replace it if leak is detected.
2.Check for wear or damage at the top of the rod. Replace it, if required.

3.Hold the timing belt auto-tensioner by hand, and press the top end of the rod onto the metal (e.g. cylinder block) under a pressure of 98 - 196 N to measure the movement of the rod.
Standard value: Within 1 mm

    A: Length when it is free (not pressed)
    B: Length when it is pressed
    A - B: Movement
4.If the measured value is out of the standard value, replace the timing belt auto-tensioner.

TIMING BELT B TENSION CHECK


<When using the tension gauge>
1.Check the timing belt B tension as follows:


2.<Special tool (MB992080) is used>
(1) Connect the special tool microphone assembly (MB992082) to the special tool belt tension meter (MB992081) of the special tool belt tension meter set (MB992080).
(2) Press the "POWER" button to turn on the power supply.
(3) Press the numeral key of "1" and check that "No.1" appears on the upper left of the display.
note This operation is to temporarily set the preset data such as the belt specifications, because if the measurement is taken without input of the belt specifications, conversion to tension value (N) cannot be made, resulting in judgement of error.
(4) Press "Hz" button twice to change the display to the frequency display (Hz).
(5)
caution
  • The temperature of the surface of the belt should be as close to normal temperature as possible.
  • Do not allow any contaminants such as water or oil to get onto the microphone.
  • If strong gusts of wind blow against the microphone or if there are any loud sources of noise nearby, the values measured by the microphone may not correspond to actual values.
  • If the microphone is touching the belt while the measurement is being made, the values measured by the microphone may not correspond to actual values.
Hold the microphone to the middle of the belt between the pulleys (at the place indicated by arrow), approximately 10 - 15 mm away from the rear surface of the belt so that it is perpendicular to the belt (within an angle of ± 15 degree).
(6) Press the "MEASURE" button.
(7) Gently tap the middle of the belt between the pulleys (the place indicated by the arrow) with your finger as shown in the illustration, and measure that the vibration frequency of the belt is within the standard value.
Standard value: 62 - 98 Hz
note To take the measurement repeatedly, fillip the belt again.
(8) After the completion of the measurement, press and hold the "POWER" button to turn off the power supply.
3.If not within the standard value, adjust the belt tension (Refer to ).

<Belt deflection check>
Check the balancer timing belt tension in the following procedures.

1.Apply a pressure of approximately 59 N at the centre (arrow area) between the sprocket as shown in the figure, then inspect whether the flexure is within the standard value.
Standard value: Less than 11 mm
2.If not within the standard value, adjust the belt tension. (Refer to ).