Counterfeit bush timing chain for ZMZ engines based on EURO3
26.03.2018
In retail of CIS countries are available counterfeit timing chains of DITTON Driving Chain Factory No.514-1006040-20, No.514-1006040-30 and No. 406-1006040-30 for ZMZ engines based on EURO3 emission standard, as well as a part of timing chain repair kit. By copying the external features of the goods, there is even used the trademark - "ДЦ" (spelling “DC”) without any significant changes, what is an obvious violation of rights and of a law.
At first glance there are following differences between the original and counterfeit timing chains:
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1. Connecting link |
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| ORIGINAL | COPY |
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Riveting: pins with conical head Colour of plates: yellow-straw Date of chain production: the numbers disclose the month and the year of production |
Riveting: pins with the flat head and cuts on two parallel sides Colour of plates: dark-blue Date of chain production: none |
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2. Quality of pin link plates |
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| ORIGINAL | COPY |
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Riveting: linear and symmetrical Blueing: white-blue Trademark "ДЦ" (spelling - "DC"): clear image |
Riveting: pins have uneven ends, and even scraps in some places. Judging by width of the chain, riveting is done unevenly. Blueing: dark-blue Trademark "ДЦ" (spelling - "DC"): in some places unclear or even incomplete emboss of the trademark, in other too deep imprint |
| 3. Bushes | |
| ORIGINAL | COPY |
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There are obvious traces and dark spots of corrosion on the surfaces of bushes. Due to inappropriate welding bushes have fault of the open instead of close weld. |
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The counterfeit bush timing chain is not suitable for the car engine. It`s use as a timing chain may lead to chain break directly in the car engine causing the damage of the motor and valves. |
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The testing results of the counterfeit timing chain showed that the chain does not comply with the requirements for the automotive 9,525 mm pitch duplex bush timing chain due to breaking load, geometrical features and the steel hardening quality of chain parts. |
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Distinctive features |
Chain requirements of JSC DITTON Driving Factory514.1006040-20
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Testing resultsof the counterfeit products |
Breaking load, N min |
19 000 |
16 000, 15 200 ( because of inner plates) |
Inner link width, max mm |
8,63 |
8,55 – 8,70 |
Inner plate thickness, mm |
1,40 |
1,45 – 1,50 |
Outer plate thikness, mm |
1,20 |
1,25-1,3 |
Bush length, max mm |
8,43 – 8, 58 |
8,70-8,72 |
Bush diameter, max mm |
6,33 – 6,35 |
6,28-6,33 |
Chain width (between ends of pins), max mm |
23,60 |
23,73-29,79 |
Yield strength between the plate and the bush, min daN |
59 |
56, 48, 48, 54, 36, 24 |
Inner plate hardness, HRC |
45-52 |
22/24-49 |
Outer plate hardness, HRC |
45-52 |
38-51 |
Intermediate plate hardness, HRC |
45-52 |
53-56 |
Bush hardness, HV5 |
644-841 |
362 - 648 |
Carbonitrided layer of bushes, mm |
0,10 – 0,20 |
0,05-0,15ductile fracture |
Carbonitrided layer of pins, mm |
0,25 – 0,40 |
0,15-0,20brittle fracture |
Riveting (pins with the flat head and cuts on two parallel sides of the end), min mm |
4,55 |
4,44 – 4,56 |
