Product Overview

This is a genuine, high-quality engine thermostat designed for Isuzu 4HK1 diesel engines. As a leading global supplier of heavy-duty engine spare parts, we provide reliable components to B2B customers worldwide, including major markets in North America, Europe, Asia-Pacific, and the Middle East. This thermostat is engineered to meet strict OEM specifications, ensuring optimal engine temperature regulation and performance for demanding industrial and construction equipment applications.

Key Features & Benefits

• Precision Temperature Control: Engineered to open at 85°C (185°F), ensuring the engine operates within its ideal temperature range for maximum efficiency and reduced wear.
• OEM-Quality Construction: Manufactured to original equipment specifications using durable materials for reliable performance and long service life under harsh operating conditions.
• Ensures Engine Protection: Prevents overheating and excessive cooling, safeguarding critical engine components from thermal stress and corrosion.
• Optimizes Fuel Efficiency: Maintains correct engine temperature for complete combustion, contributing to optimal fuel economy and lower emissions.
• Direct Fit Replacement: Designed as an exact match for the original part, guaranteeing easy installation without modification.

Technical Specifications

OEM Cross-Reference

This genuine thermostat directly replaces the following OEM part numbers:

• Isuzu: 8973007873, 8-97300787-3
• Related Assembly/Alternative: 8973007903, 8-97300790-3

Compatibility

This thermostat is specifically designed for engines using the Isuzu 4HK1 platform. It is a critical spare part for a range of heavy machinery, including:

• Application: Excavators, Wheel Loaders, Generator Sets, and other industrial equipment powered by the Isuzu 4HK1 diesel engine.
• Primary Use: Ideal for maintenance, repair, and overhaul (MRO) operations for fleet managers, equipment rental companies, and independent repair workshops.

Global Supply & Distribution

We specialize in the international export of genuine engine components. Our logistics network ensures efficient delivery to key industrial hubs and ports globally.

• Worldwide Shipping: We ship to all major continents, including North America (USA, Canada, Mexico), Europe (Germany, UK, Poland), Asia-Pacific (Australia, Japan, Singapore), and the Middle East (UAE, Saudi Arabia).
• Fast Delivery: Consolidated shipments and established freight partnerships enable reliable delivery to major ports and inland logistics centers.
• Export Expertise: All documentation, including commercial invoices, packing lists, and certificates of origin, is prepared in full compliance with international trade regulations for smooth customs clearance.

Quality Assurance

Every part supplied is guaranteed to meet the highest standards of quality and performance.

• Genuine Part: This is not an aftermarket imitation. It is a genuine component manufactured to Isuzu’s original specifications.
• Rigorous Testing: The thermostat undergoes functional testing to verify the precise 85°C opening temperature and seal integrity.
• Reliability: Supplied with full confidence for direct installation into critical engine cooling systems.

FAQ

Q1: Is this thermostat a direct fit for my Isuzu 4HK1 engine in an excavator?
A1: Yes. This genuine thermostat (part number 8973007873) is designed as a direct replacement for the original thermostat in Isuzu 4HK1 engines, commonly found in various excavator models and other heavy equipment. No modifications are required for installation.

Q2: What is the significance of the 85°C opening temperature?
A2: The 85°C (185°F) setting is critical for diesel engine efficiency. It allows the engine to reach its optimal operating temperature quickly, reducing fuel consumption and wear, while preventing overheating under load. Using the correct temperature rating is essential for proper engine management.

Q3: Do you provide support for bulk orders and international shipping documentation?
A3: Absolutely. We specialize in B2B bulk transactions and have extensive experience handling exports. We provide all necessary shipping documents, assist with HS code classification, and can arrange CIF/FOB shipments to your nearest port to streamline your supply chain.

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 .