Timing Chain, Sprockets, and WP Driveshaft Replace. Buick Roadmaster 1996

For 1990-2009 cars

### Removal Procedure

#### Tools Required

• | J 5825-A Crankshaft Gear Puller

• | J 39243 Water Pump Driveshaft Remover

1. Remove the water pump. Refer to Water Pump Replacement .
2. Remove the engine front cover. Refer to Engine Front Cover Replacement .
3. Remove the reluctor ring from the crankshaft hub.
4. Rotate the crankshaft until the sprocket alignment marks on the crankshaft sprocket and the camshaft sprocket are aligned.
5. Remove the camshaft sprocket bolts.

Important: Do not turn the crankshaft after the timing chain has been removed in order to prevent damage to the pistons and the valves.

6. Remove the camshaft sprocket and the camshaft timing chain.
7. Remove the water pump bearing retainer bolts/screws.
8. Remove the water pump driveshaft. Use the J 39243 .
9. Remove and discard the O-ring seal from the water pump driveshaft.
10. Remove the crankshaft sprocket. Use the J 5825-A .
11. Remove the key if necessary.
12. Inspect the camshaft, crankshaft, and the water pump driveshaft for the following conditions:

• | One edge of the teeth worn

• | Teeth are no longer concentric

• | Worn valley between the teeth

13. Inspect the following components for the conditions stated:

• | Key -- for wear

• | Crankshaft keyway -- for wear

• | Timing chain -- for binding

• | Timing chain -- for signs of contacting the engine front cover

### Installation Procedure

#### Tools Required

• | J 5590 Crankshaft Gear Installer

• | J 41546 Water Pump Driveshaft Installer

• | J 39087 Driven Gear Shaft Front Cover Seal Protector

• | J 39089 Water Pump/Driven Gear Seal Installer

1. Install the key, if previously removed.
2. Install the crankshaft sprocket. Use the J 5590 .
3. Install the water pump driveshaft. Use the J 41546 . Place the J 41546 over the water pump shaft. Ensure that the three fingers of the tool pass through the gear. Use a mallet in order to drive the shaft into the block casting.
4. Install the water pump bearing retainer bolts.

Tighten
Tighten the water pump bearing retainer bolts to 12 N·m (106 lb in).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: The camshaft sprocket and the water pump driveshaft gears must mesh or damage to the camshaft retainer may occur.

5. Install the camshaft sprocket.
6. Install the timing chain.
7. Install the camshaft sprocket bolts. Ensure the camshaft and the crankshaft sprocket alignment marks align as shown.

Tighten
Tighten the camshaft sprocket bolts to 25 N·m (18 lb ft).

8. Install the new O-ring seal to the water pump driveshaft using the J 39089 .
9. Install the reluctor ring on the crankshaft hub.
10. Install the engine front cover. Refer to Engine Front Cover Replacement .
11. Install the water pump. Refer to Water Pump Replacement .