K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
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To check the position of the axial plate on the shaft. remove the clutch driven plate and measure the distance between the front head extension
and the flat shoulder on the shaft with a wire gage. The clearance should be 0.66-1.9 mm (0.026-0.075-inch).
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If the shaft has been pushed back in the axial plate (measurement greater than 1.9 mm (0.075-inch), disassemble the compressor and replace
the shaft and axial plate assembly. thrust races and thrust bearings.
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If there is too much or not enough air gap between the drive and driven plates. check for shaft dislocation. It will not be possible to service the
compressor if the carbon seat is not seating against the seal seat.
