Duramax LLY – ENGINE DISASSEMBLY – Fan and Pulley Removal

1. Insert spanner Jโ€“41240-1 in holes in water pump pulley (Figure 2-62).

2. Use spanner to hold water pump shaft and wrench Jโ€“41240-5A to loosen nut securing fan clutch to water pump.

3. Remove bolts attaching fan to fan clutch.

4. Remove fan and clutch from water pump.

5. Remove crankshaft pulley attaching bolts and remove pulley (Figure 2-62).

6. Remove torsional damper bolt with socket and impact wrench. Retain damper bolt and washer.

7. Loosen torsional damper with tool Jโ€“23523-F (Figure 2-63).

8. Remove damper and woodruff keys from crankshaft.