Thermostat Housing Cap 8-94368589-0 8943685890 For ISUZU NHR NKR 4JB1 4JA1 Diesel Engine
| Part Name: | Thermostat Housing Cap / Thermostat Cover / Thermostat With Valve Cover | Part No: | 8-94368589-0, 8943685890 |
| Vehicle Application: | ISUZU NHR, ISUZU NKR | Engine Application: | ISUZU 4JB1, 4JA1, 4JG2, 4BE1 |
| Mounting Type: | Bolt-On To Engine Block / Cylinder Head | Material: | Aluminum |
| Component: | Thermostat Housing Cover | Cold Style: | Water-Cooled |
| Fitment: | OEM Standard, Direct Replacement | Condition: | Brand New |
| H/S Code: | 8409919990 | ||
| High Light: | ISUZU thermostat housing cap,thermostat cap for 4JB1 engine,NKR diesel engine thermostat |
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Function: Aluminum thermostat housing cap with valve cover seals the thermostat and coolant passage, maintaining proper engine temperature in ISUZU NHR and NKR diesel trucks.
The Thermostat Housing Cap (OEM Number: 8-94368589-0 / 8943685890) is a premium-quality, direct replacement cooling system component designed specifically for ISUZU NHR and NKR series light-duty trucks equipped with 4JB1, 4JA1, 4JG2, and 4BE1 diesel engines. This aluminum thermostat housing cap - also known as a thermostat cover or thermostat with valve cover - houses the thermostat and seals the coolant passage between the engine block and the radiator hose. It maintains proper coolant flow and engine operating temperature, preventing overheating and ensuring efficient combustion.
| Part Number | 8-94368589-0, 8943685890 | Product Name | Thermostat Housing Cap / Thermostat Cover / Thermostat with Valve Cover |
|---|---|---|---|
| Car Model | ISUZU NHR, ISUZU NKR | Engine Model | ISUZU 4JB1, 4JA1, 4JG2, 4BE1 |
| Condition | 100% Brand New | Size | |
| Weight | Standard | Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe | Package | Neutral Packing Or Make It As Requested |
| Warranty | 6 Months | Price & Stock | Please Contact Us To Get More Information |
| Material | High-strength aluminum alloy & precision bearings | Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement | Quality Standard | OEM equivalent / ISO quality control |
- OE Quality: Manufactured to strict ISUZU dimensional and material specifications for perfect fit and function.
- Aluminum Construction: High-strength aluminum body offers excellent heat dissipation and corrosion resistance.
- ISO9001 Certified: Produced under a certified quality management system for consistent product quality.
- Water-Cooled Structure: Designed for efficient coolant flow and proper thermostat operation.
- Integrated Valve Cover: Provides secure thermostat retention and proper sealing.
- Precision-Machined Surfaces: Ensures a leak-proof seal against the engine block and thermostat.
- Restores Cooling Performance: Eliminates coolant leaks and overheating caused by a cracked or warped housing cap.
- Direct Replacement: Matches OE mounting bolt pattern and hose connections.
- Long Service Life: Engineered for light-duty commercial truck applications.
- Cost-Effective Repair: Affordable replacement that prevents costly engine damage.
This thermostat housing cap is specifically designed for ISUZU light-duty trucks and commercial vehicles. Common applications include:
- ISUZU NHR (Light-Duty Trucks)
- ISUZU NKR (Light-Duty Trucks)
- ISUZU NKR55, NHR55 (as applicable)
- ISUZU ELF (select models)
- ISUZU 4JB1 -- 2.8L Inline-4 Diesel
- ISUZU 4JA1 -- 2.5L Inline-4 Diesel
- ISUZU 4JG2 -- 3.1L Inline-4 Diesel
- ISUZU 4BE1 -- 3.6L Inline-4 Diesel
Professional mechanic installation recommended:
- Ensure engine is cool - Never work on the cooling system when the engine is hot to avoid burns.
- Disconnect battery - Always disconnect the negative terminal before working.
- Drain coolant - Partially drain the cooling system to below the thermostat housing level.
- Remove the old housing cap - Unbolt and remove the old thermostat housing cap; note the thermostat orientation.
- Remove the thermostat - If reusing the thermostat, remove it carefully and inspect for wear or damage.
- Clean mating surfaces - Thoroughly clean the housing and engine mounting surfaces; remove all old gasket material.
- Install new gasket - Position a new gasket or O-ring on the housing or engine surface.
- Install the thermostat - Place the thermostat in the correct orientation (jiggle valve or air bleed hole up, if equipped).
- Install the new housing cap - Position the new cap over the thermostat; align bolt holes.
- Torque bolts - Tighten mounting bolts to manufacturer torque specifications. Do not over-tighten.
- Refill with coolant - Fill the system with the correct coolant mixture (50/50 antifreeze/water or as specified).
- Bleed the cooling system - Start the engine and bleed air from the system per manufacturer procedure.
- Check for leaks - Inspect the housing cap area for coolant leakage.
- Check operating temperature - Allow engine to reach operating temperature and verify gauge reading.
- Material Verification: Confirms aluminum composition meets ISUZU strength and corrosion resistance specifications.
- Dimensional Inspection: Mounting bolt pattern, hose connection size, and sealing surface flatness verified within OEM tolerances.
- ISO9001 Quality System: Manufactured under ISO9001-certified quality management.
- Pressure Testing: Sample tested for leak-proof integrity under operating coolant pressure.
- Visual Inspection: 100% checked for casting defects, cracks, or machining flaws.
- 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
For pricing, availability, or bulk purchase of the Thermostat Housing Cap 8-94368589-0 8943685890 For ISUZU NHR NKR 4JB1 4JA1 Diesel Engine, please contact our sales team for a competitive quote and expert technical support.
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