Flywheel 8-97115782-0 8971157820 For ISUZU 4HG1 4HF1 NKR NPR Engine Auto Spare Parts

The Flywheel (OEM Numbers: 8-97115782-0 / 8971157820) is a premium-quality, direct replacement engine component designed specifically for ISUZU NKR and NPR series trucks equipped with 4HG1 and 4HF1 diesel engines. This heavy-duty, precision-machined flywheel serves multiple critical functions: it stores rotational kinetic energy to smooth engine operation, provides the friction surface for the clutch pressure plate to engage and disengage, and features a starter ring gear for engine starting.

This flywheel is specifically designed for ISUZU light- and medium-duty trucks and commercial vehicles. Common applications include:

• ISUZU NKR (Light-Duty Trucks)
• ISUZU NPR (Medium-Duty Trucks)
• ISUZU 4HG1 Engine Specifications:
  • 4-Cylinder, Inline Diesel
  • Displacement: 4.3L
  • Application: Light- and medium-duty trucks
• ISUZU 4HF1 Engine Specifications:
  • 4-Cylinder, Inline Diesel
  • Displacement: 4.3L
  • Application: Light- and medium-duty trucks
• Industrial Applications: Forklifts, generators, and various equipment utilizing 4HG1/4HF1 engines

Professional mechanic or engine builder installation is essential:

1. Remove the transmission - Safely remove the transmission assembly from the vehicle
2. Remove the clutch assembly - Unbolt and remove the clutch cover and disc from the flywheel
3. Remove the old flywheel - Use proper flywheel holding tools; unbolt and remove the old flywheel
4. Inspect the crankshaft flange - Check the crankshaft mounting surface for damage, wear, or debris
5. Clean the crankshaft flange - Thoroughly clean the mounting surface; remove all old sealant or debris
6. Inspect the old flywheel - Check for cracks, scoring, or heat damage; inspect ring gear teeth for wear
7. Prepare the new flywheel - Clean the new flywheel; ensure all surfaces are free of oil and debris
8. Install the new flywheel - Position the flywheel on the crankshaft flange; align the dowel pins
9. Install mounting bolts - Apply thread locker (if specified); hand-start and snug all bolts
10. Torque bolts - Tighten flywheel mounting bolts in a criss-cross pattern to manufacturer torque specifications
11. Check ring gear - Manually rotate the flywheel; inspect ring gear for full, uniform teeth
12. Install the clutch - Install the clutch disc and pressure plate; align using a clutch alignment tool
13. Torque clutch bolts - Tighten clutch cover bolts in a criss-cross pattern to specification
14. Reinstall the transmission - Install the transmission assembly; ensure proper clutch fork and release bearing fit
15. Check clutch operation - Test the clutch pedal operation; ensure smooth engagement and disengagement