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Denso injectors for Isuzu 4HK1 and 6HK1 engines: how to recognize a fake and avoid problems

Denso injectors for Isuzu 4HK1 and 6HK1 engines: how to recognize a fake and avoid problems

01/05/2025

Denso injectors for Isuzu 4HK1 and 6HK1 engines: how to recognize a fake and avoid problems

Excavators with Isuzu 4HK1 and 6HK1 TIER 3 engines have proven themselves as reliable and productive equipment. One of the key parts of the fuel system is the injectors, the serviceability of which directly affects the efficiency of the engine, fuel consumption and durability of other components. Unfortunately, recently the spare parts market has been filled with fakes that can lead to serious breakdowns and significant financial losses. In this article, we will consider the main catalog numbers of injectors for these engines and provide tips on recognizing counterfeit products.

The main injector part numbers for Isuzu 4HK1 and 6HK1 engines that are worth investigating are:

  • 8-98284393-0 / 8982843930
  • 8-98280697-1 / 8982806971
  • 8-97329703-6 / 8973297036
  • 8-98151837-1 / 8981518371

(8973297035 8973297034 8973297033 8973297032 8973297031 8973297030 8981518370 8981518372 8981518373 8982806970 8982806972 8982806973 8982806974 8982806975 8982806976 8982806977 8982843931 8982843932 8982843933 8982843934 8982843935 8982843936 8982843937 8982843938 8982843939)

These numbers are direct analogues and key to identifying original parts. However, having the correct number on the packaging does not guarantee the originality of the product.

A little history or why, where and how fake injectors appeared.

Japan's geographical proximity to China, which has become a global factory, has led to the fact that Japanese Isuzu engines have become very popular in this country. Accordingly, the need for injectors and other spare parts is growing year by year. But unlike most other spare parts, injectors and common rail fuel pumps for Isuzu are manufactured by Denso Corporation, which has invested hundreds of millions of dollars in the development of fuel equipment. These parts are so complex that even the Chinese still cannot copy them and launch full-scale production. Therefore, used injector housings are used to make copies, in which only the injectors and a few other small elements are changed. It should also be noted that Denso does not sell/manufacture injectors separately, respectively, copies of varying degrees of quality are used.

How to recognize a fake Isuzu injector: main signs

To avoid purchasing a low-quality fake, pay attention to the following aspects:

  1. Packaging:

Original: Supplied in high-quality branded Isuzu packaging with clear markings, stickers, holograms (not all batches), catalog number, barcode and information about the manufacturer. The packaging must be intact, without damage, and the fonts on the sticker must be clear and even. The presence of a watermark with a clear inscription ISUZU.
  

Fake:May have poor quality cardboard, blurry printing, missing important marking elements (e.g. barcode), or damage. Fonts on the sticker may not be clear or evenly printed. Sometimes counterfeits are sold without packaging at all or in non-original packaging. Counterfeits that pretend to be Denso have become extremely popular, although since 2013, injectors have not been supplied in boxes of this brand (most often on such boxes you can see the following numbers: 9709500-0660 095000-0660 295900-0660 09500-5471 095000-5471 095000-5470 095000-5470). Counterfeits of Chinese brands OUSIMA, NDC, Maguro, Diamond, IZUMI original have also appeared.


 

  1. Packing in a box

Original:The injector is in a sealed package with a special paper, and is also protected from impacts by bubble wrap (bubble). It is also mandatory to have instructions for programming the injector code in the vehicle's ECU.



 

Fake:It may not have some of the listed mandatory elements, or these elements will have a different appearance.

  1. Appearance of the nozzle:
     

Original:It has high-quality metal processing, uniform coating, clear inscriptions and markings without errors. All elements of the nozzle look neat and reliable.

Fake:May have irregularities, dents, traces of poor workmanship, unclear or incorrect inscriptions. Materials may look cheaper. Pay attention to the quality of casting and assembly. Due to the fact that the Chinese use used housings, often on the nozzle still sealed in the package you can see scratches on the housing.

  1. Marking on the injector body:

Original:Contains only four lines of text. 1st line - clearly engraved Denso manufacturer logo2nd line - the last four digits of the Denso internal catalog number (in the case of injector 8982843930 it is 0660)3rd line - serial number and date of manufacture4th line - the last four digits of the Isuzu catalog number (must match the last four digits on the box sticker)The marking must be resistant to erasure, have even letters and the same font.

Fake:The markings may be unclear, painted on, easily erased, contain errors in the inscriptions or be absent altogether. Also, Chinese counterfeits often have their own logo or a distorted DENSO logo.


  1. Equipment

Original:The following items are necessarily supplied with the nozzle:

  1. spray cap
  2. fuel pipe connection cap
  3. o-ring
  4. plastic cap with barcode

Fake:The above-listed elements are completely or partially missing. Also, additional components such as various sealing rings and washers may be supplied with counterfeit injectors.

  1. Plastic cap with barcode.

Original:The QR code is needed to correctly configure the injector operation with the vehicle's ECU - the inability to configure the product may lead to an increase in fuel consumption by 1-5%. The code scanned by the phone will look like the second photo - it is a 30 or 32-character code.

Fake:The barcode cap may be missing or the barcode cannot be read because it only looks like a code.

  1. Quality of materials and workmanship:
     
    • Original:It is made of high-quality materials and follows precise technological processes. All parts fit tightly together.
    • Fake:It may be made of cheaper materials, have inaccurate dimensions, and have play between parts, which can lead to rapid wear and failure.
  1. Price:

Too low a price should raise suspicion. Original Isuzu injectors are technologically complex products and cannot be too cheap.

  1. Place of purchase:
     

Buy spare parts only from trusted suppliers, official dealers or reputable stores. Avoid buying spare parts from unknown sellers.

Why is it important to use original injectors?

Installing counterfeit injectors can lead to a number of problems:

  • Unstable engine operation:Jerks, loss of power, uneven revs.
  • Increased fuel consumption:Improper fuel atomization leads to inefficient combustion.
  • Damage to other fuel system elements:Poor fuel supply can adversely affect the high-pressure fuel pump and other components.
  • Reduced engine life:Improper operation of injectors can lead to burnt pistons and other serious damage.
  • Equipment downtime and financial losses:Engine repairs caused by the use of counterfeit parts will cost significantly more than purchasing original injectors.

Conclusion

Be careful when choosing injectors for your Isuzu 4HK1 or 6HK1 engine excavator. Carefully checking the packaging, appearance, labeling and place of purchase will help you avoid purchasing counterfeits and ensure reliable and long-lasting operation of your equipment. Remember that saving on spare parts can lead to significantly higher costs in the future. Trust only proven suppliers!