K 2500 Truck 4WD V8-454 7.4L VIN J SFI (1997)
Idler Pulley: Testing and Inspection
Examine the pulleys for chips, nicks, tool marks, cracks, bent sidewalls, corrosion, or other damage.
1. Place a straightedge or position a cord across the two pulleys so they touch at all points.
2. Turn each pulley one half revolution and recheck with a straightedge or cord. Full contact at all points must be made. If contact is not made at all
points, the pulley may be warped or its shaft could be bent. Replace any parts found to be damaged.
3. If the belt becomes loose and squeals or the belt comes off the engine drive pulleys.
