Thermostat 8-97602048-3 8976020483 For ISUZU FVZ FVZ34 6HK1 Engine ISUZU Truck Parts

The Thermostat (OEM Numbers: 8-97602048-3 / 8976020483) is a premium-quality, direct replacement engine cooling component designed specifically for ISUZU FVZ and FVZ34 series trucks equipped with 6HK1 diesel engines.

This precision-engineered thermostat controls coolant flow between the engine and radiator, maintaining optimal operating temperature. When cold, it remains closed for quick warm-up. At designated temperature, it opens to circulate coolant through the radiator, dissipating excess heat for efficient combustion, reduced emissions, and extended engine life.

• OE Quality: Manufactured to strict ISUZU dimensional and temperature specifications for perfect fit and function
• Precise Temperature Control: Calibrated wax element opens and closes at exact OE temperature for optimal cooling
• Durable Construction: Stainless steel or brass housing resists corrosion, vibration, and thermal cycling
• Reliable Performance: Ensures proper coolant flow to prevent overheating and maintain efficient combustion
• Fast Warm-Up: Closed valve during cold start allows engine to reach operating temperature quickly
• Prevents Overheating: Opens fully at designated temperature to allow maximum coolant circulation
• Direct Replacement: Matches OE thermostat dimensions, flange, and seal configuration
• Long Service Life: Engineered for heavy-duty commercial diesel engine applications
• Essential Cooling System Component: Critical for engine protection and fuel efficiency

This thermostat is specifically designed for ISUZU heavy-duty trucks and commercial vehicles:

• ISUZU FVZ (Heavy-Duty Trucks)
• ISUZU FVZ34 (Heavy-Duty Trucks)
• ISUZU FR, FS, FT series (as applicable)

ISUZU 6HK1 Engine Specifications:

• 6-Cylinder, Inline Diesel
• Displacement: 7.8L
• Valvetrain: OHV
• Application: Heavy-duty trucks, buses, and industrial equipment

Also compatible with various ISUZU models using the 6HK1 engine with the same thermostat housing configuration.

1. Ensure engine is cool - Never work on cooling system when engine is hot to avoid burns
2. Drain coolant - Partially drain cooling system below thermostat housing level
3. Remove thermostat housing - Unbolt and remove housing to access old thermostat
4. Remove old thermostat - Note orientation and remove old thermostat and gasket
5. Clean sealing surfaces - Thoroughly clean housing and engine mating surfaces; remove old gasket material
6. Install new thermostat - Position with correct orientation (jiggle valve or air bleed hole up, if equipped)
7. Install new gasket - Place new gasket or O-ring on housing
8. Reinstall housing - Bolt housing back into place; tighten bolts to manufacturer torque specifications
9. Refill with coolant - Fill system with correct coolant mixture (50/50 antifreeze/water or as specified)
10. Bleed cooling system - Start engine and bleed air from system per manufacturer procedure
11. Check for leaks - Inspect thermostat housing area for coolant leakage
12. Check operating temperature - Allow engine to reach operating temperature and verify gauge reading and cooling fan operation

• Temperature Calibration: Each thermostat tested to ensure it opens at specified OE temperature
• Seal Integrity Testing: Valve and housing tested for leak-proof performance
• Material Verification: Housing and internal components meet ISUZU corrosion resistance and durability specifications
• Dimensional Inspection: Flange diameter, overall height, and seal groove verified within OEM tolerances
• Visual Inspection: 100% checked for defects, cracks, or assembly errors
• Packaged Safely: Protected and packaged to prevent damage during transit

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea