140KW DUPLEX TIMING CHAIN KIT
140 kw engine
The original euro 2 yd25 engine had a double row fuel pump chain. The euro 3 and euro 4 yd25 engine used a single row fuel pump chain but the guides and sprockets remained double row thickness. The euro 5 140kw engine still uses a single row chain but the sprockets were made thinner.
140 Kw engines come with 2 vacuum pumps. We cannot tell from the VIN which pump is fitted. You need to identify which pump is fitted to your car. Below are the 2 pumps. The sprockets for each is different. It is imperative that sprocket chain alignment from the crank to vacuum pump is achieved. This is done by us making special shims. Check chain alignment from the vacuum pump sprocket to the fuel pump sprocket is a must for chain longevity. This is achieved with fuel pump shims.
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| Early vacuum pump | Late vacuum pump |
The original yd25 engine had a double row fuel pump chain. The euro 3 and euro 4 yd25 engine used a single row fuel pump chain but the engine still kept double row guides and the sprockets where left double row thickness. The euro 5 140kw engine still uses a single row chain but the sprockets were made thinner. Because the sprockets are thinner on the 140kw model when you put a double row sprocket on the crank it pushes out the crank helical gear reducing the contact area between the balance shaft gears. Some parts suppliers have made a 1/2 thickness crankshaft helical gear to drive the balance shaft idler gear. Having 1/2 the gear meshing area than original. This causes the idler gear to wear excessively. The shed metal contaminates the engine oil causing damage to the oil pump first then the rest of the engine..
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| 140kw single row chain balance shaft gear lingment | 140kw with duplex chain fitted missalinged crank gear | 140kw with duplex chain fitted missalinged crank gear |
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