Wax-Pellet Type Thermostat with Brass / Copper Alloy Housing for ISUZU 4JB1 Engine

Name: Wax-Pellet Type Thermostat with Brass / Copper Alloy Housing for ISUZU 4JB1 Engine
Brand: Yimi (Guangzhou) Automotive Parts Co, Ltd
SKU: ISUZU NKR55
Availability: InStock

Basic Properties

Place of Origin: China

Brand Name: YIMI

Certification: ISO/TS16949

Model Number: ISUZU NKR55

Trading Properties

Minimum Order Quantity: 10 pcs

Price: Negotiable

Payment Terms: T/T,

Supply Ability: 10000 pcs/month

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Specifications

Housing Material:	Brass / Copper Alloy	Engine Applications:	ISUZU 4JB1 Diesel Engine (2.8L)
Thermostat Type:	Wax-Pellet Type	Opening Temperature:	OE Calibrated (Refer To Service Manual)
Cooling Type:	Engine Coolant Circulation	Material:	High-strength Aluminum Alloy & Precision Bearings
Displacement:	2.8L (2771cc)	Valvetrain:	OHV
High Light:	Wax-pellet thermostat for ISUZU 4JB1 , Brass housing engine thermostat , Copper alloy ISUZU truck thermostat

Product Description

Thermostat 8-97361770-0 For ISUZU NKR55 4JB1 Engine

Precision-engineered thermostat regulates engine coolant temperature by controlling coolant flow to the radiator, ensuring optimal operating temperature for improved efficiency and reduced emissions in ISUZU 4JB1 engines.

Part Number	8-97361770-0, 8973617700, 8-94214962-0, 8942149620, 8-97089891-0, 8970898910
Product Name	Thermostat / Engine Coolant Thermostat
Car Model	ISUZU NKR55 Series
Engine Model	ISUZU 4JB1 Diesel Engine (2.8L)
Condition	100% Brand New
Origin	China Mainland
Main Market	Middle East, Asia, Africa, South America, North America & Europe
Warranty	6 Months

ISUZU NKR55 thermostat component showing detailed construction and mounting features

Features & Advantages

OE Quality: Manufactured to strict ISUZU dimensional and temperature specifications for perfect fit and function
Precision Temperature Control: Calibrated to open and close at the exact specified temperature for optimal engine operation
Durable Construction: Brass/copper housing provides excellent corrosion resistance and durability
Wax-Pellet Element: Reliable temperature-sensing technology with consistent performance
High-Quality Spring: Maintains proper valve operation under varying conditions
Jiggle Pin/Bleed Valve: Allows air to escape during system filling, preventing air pockets
Quick Warm-Up: Ensures engine reaches operating temperature rapidly for reduced wear and emissions
Stable Operating Temperature: Maintains consistent temperature for optimal fuel efficiency and performance
Prevents Overheating: Proper coolant regulation protects the engine from thermal damage
Direct Replacement: Simple installation during cooling system service
Prevents Engine Damage: Protects against overheating or overcooling-related failures
Cost-Effective: Minor investment that protects the entire engine investment

Thermostat installation diagram and compatibility chart for ISUZU 4JB1 engines

Vehicle & Engine Compatibility

This thermostat is specifically designed for ISUZU light-duty trucks and equipment. Common applications include:

ISUZU NKR55 – Light-Duty Trucks
ISUZU NKR (various models with 4JB1 engine)
ISUZU NPR (select light-duty models with 4JB1)

ISUZU 4JB1 Engine Specifications

4-Cylinder, Inline Diesel
Displacement: 2.8L (2771cc)
Naturally Aspirated and Turbocharged variants
Valvetrain: OHV
Widely used in NKR series light-duty trucks

Industrial Applications

Forklifts, generators, compressors, agricultural equipment, and marine applications utilizing the 4JB1 engine.

Installation Notes

Professional installation recommended. Cooling system cleanliness is essential.

Cool the engine – Allow the engine to cool completely before beginning work
Drain coolant – Drain the cooling system to a level below the thermostat housing
Remove the thermostat housing – Unbolt and carefully remove the thermostat housing cover
Remove the old thermostat – Note the orientation for correct installation of the new unit
Clean the housing – Clean the housing and mounting surface, removing all old gasket material
Inspect the housing – Check for cracks, corrosion, or warping; replace if necessary
Prepare the new thermostat – Test the new thermostat (optional) in hot water to verify operation
Position the new thermostat – Install with the wax pellet facing the engine (toward the cylinder head)
Align properly – Ensure the jiggle pin/bleed valve is positioned at the highest point (usually 12 o'clock)
Install the new gasket – Place the new gasket or O-ring on the housing or thermostat as required
Reinstall the housing cover – Bolt the thermostat housing cover back into place
Tighten to specification – Torque the housing bolts to manufacturer specification
Refill coolant – Refill the cooling system with the correct mixture and type of coolant
Bleed air from the system – Use the jiggle pin and/or bleed valves to remove air from the system
Check for leaks – Start the engine and inspect for any coolant leakage around the housing
Verify operation – Allow the engine to reach operating temperature and confirm the thermostat opens

Quality Control

Temperature Calibration: Opening and closing temperatures verified against OE specifications
Dimensional Inspection: Housing diameter, height, and mounting features verified against OEM tolerances
Spring Tension Testing: Spring force measured to ensure correct valve operation
Leakage Testing: Sealing performance verified when closed
Stroke Verification: Valve lift (opening distance) measured to ensure adequate coolant flow
Material Verification: Confirms housing and internal components meet OE specifications
Jiggle Pin Function: Bleed valve operation verified
Visual Inspection: 100% checked for housing defects, corrosion, or damage
Packaged Safely: Protected and securely packaged to prevent damage during transit

Packaging and Delivery

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

Inquiry

For pricing, availability, or bulk purchase of the Thermostat 8-97361770-0 For ISUZU NKR55 4JB1 Engine, please contact our sales team for a competitive quote and expert technical support.