B4000 2WD V6-4.0L SOHC (2003)
Note:
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4.0L does not have flat idler on tensioner.
With the engine running, check drive belt tracking (the position of the drive belt on one of the grooveless pulleys, idlers or belt tensioner. If the edge
of the drive belt rides beyond the edge of the pulley, noise and premature wear may result). If a drive belt tracking condition exists, visually check the
drive belt tensioner for damage, especially the mounting pad surface. If the belt tensioner is not installed correctly with the locating pins in the locating
holes, the mounting surface pad will be out of position. This will result in abnormal drive belt tension and chirp and squeal noises.
If the above procedures do not correct the drive belt noise, try replacing the drive belt with a known good original equipment drive belt. However, the
drive belt noise may return (with mileage) if one of the above conditions still exists uncorrected.
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With engine running, visually observe the grooves in the pulleys (not the pulley flanges) for excessive wobble. Replace components as required.
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Check all accessories, mounting brackets and belt tensioner, for any interference that would prevent the component from mounting properly.
Correct any interference condition. Recheck belt tracking.
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Tighten all accessories, mounting brackets and belt tensioner retaining hardware to specification. Recheck drive belt tracking.
