C 1500 Suburban 2WD V8-393 6.5L DSL Turbo VIN S (1996)
Timing Chain: Service and Repair
Timing Chain Replacement
TIMING CHAIN AND SPROCKET REPLACEMENT
REMOVE OR DISCONNECT
NOTICE: If the timing chain, timing gears, front cover, crankshaft position sensor, crankshaft or other components affecting timing are replaced, it
will be necessary to reprogram TDC Offset Into the PCM.
1. Front cover.
MEASURE:
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Timing chain free play as follows:
A. Mount a dial indicator to the front of the block.
B. Position the dial indicator so the plunger contacts the timing chain between the two gears.
C. Pull the chain outward (parallel to the front face of the block) the maximum amount with finger pressure on the inside of the chain.
D. Set the dial indicator to zero.
E. Move the chain inward (parallel to the front face of the block) the maximum amount with finger pressure on the outside of the chain.
F. Note the total indicator travel. With used parts, the deflection must not exceed 20.3 mm (0.8 inch). if the deflection exceeds this limit, the
sprockets and timing chain must be inspected for wear and replaced as necessary. With new pans the maximum deflection must not exceed
12.7 mm (0.5 inch).
