Product Overview

This is a high-performance OEM replacement thermostat designed specifically for the Isuzu 4HK1 diesel engine, commonly found in excavators and other heavy-duty industrial machinery. We specialize in the global supply of genuine-quality engine components, serving major markets across North America, Europe, Asia-Pacific, and the Middle East with reliable shipping and expert export support.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications to ensure perfect fitment and optimal engine performance.
• Optimal Temperature Regulation: Maintains the engine at its ideal operating temperature, improving fuel efficiency and reducing wear.
• Robust Construction: Built with high-grade materials to withstand the high pressures and thermal cycles of heavy-duty diesel operation.
• Enhanced Durability: Reliable operation under extreme conditions, minimizing downtime and maintenance costs for your equipment.
• Global Compliance: Produced for international markets, ensuring compatibility and reliability wherever your machinery operates.

Technical Specifications

OEM Cross-Reference

This part is a direct replacement for the following OEM numbers:

• Isuzu: 8-97300787-3, 8973007873

Please verify the part number from your original component or equipment manual to ensure correct fitment.

Compatibility

This thermostat is compatible with machinery equipped with the Isuzu 4HK1 diesel engine. Common applications include:

• Various Hitachi, Kobelco, and other brand excavator models.
• Industrial generators and power units.
• Other heavy equipment utilizing the 4HK1 power plant.

Note: Compatibility can vary by specific machine model and production year. Always cross-reference part numbers for confirmation.

Global Supply & Distribution

We are a trusted partner for B2B buyers worldwide. Our logistics network ensures efficient delivery to major industrial hubs and ports across continents.

• Worldwide Shipping: Reliable air and sea freight to North America, EU, UK, ASEAN, Australia, and the Middle East.
• Fast Delivery: Consolidated shipments to key logistics centers for reduced lead times.
• Export Expertise: Full documentation support (Commercial Invoice, Packing List, Certificate of Origin) for smooth customs clearance.
• Market Focus: Extensive experience supplying to construction, mining, and equipment rental industries globally.

Quality Assurance

We commit to providing components that meet the highest standards of performance and reliability.

• Manufacturing Standards: Produced in ISO-certified facilities using precision tooling and quality-controlled materials.
• Rigorous Testing: Each thermostat undergoes functional testing to verify accurate opening temperature and seal integrity.
• Warranty: Backed by a standard warranty against manufacturing defects. Contact us for specific warranty terms applicable to your region.

FAQ

Q1: How do I confirm this thermostat fits my specific 4HK1 engine?
A1: The most reliable method is to match the part number. Locate the thermostat on your engine, clean it, and compare the stamped number (8-97300787-3 or 8973007873) with our listing. You can also provide your equipment’s model and serial number for our technical team to verify.

Q2: What is the typical operating temperature range for this thermostat?
A2: This OEM-spec thermostat is designed to begin opening at the engine’s designated operating temperature (typically between 82°C – 88°C / 180°F – 190°F for the 4HK1), fully opening as coolant temperature rises to regulate the engine within its optimal efficiency range.

Q3: Do you offer technical support for installation or troubleshooting?
A3: Yes, we provide basic technical guidance for our B2B clients. For complex installation procedures, we recommend consulting the official equipment service manual or a certified technician. We can supply relevant technical diagrams upon request to assist your maintenance team.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .