S10/T10 Blazer 4WD V6-4.3L VIN W (1997)
3. Remove the crankshaft position sensor reluctor ring.
4. Remove the camshaft sprocket bolt, the camshaft sprocket and the timing chain.
5. Remove the crankshaft sprocket.
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Remove crankshaft sprocket key, if necessary.
INSTALLATION
1. If removed, install the key into the crankshaft keyway.