If the engine is the "heart" of the car, then the timing is its "pulse". The well-coordinated operation of the gas distribution mechanism ensures the correct rhythm of opening and closing the valves, consistent fuel supply, combustion and exhaust. When this system fails, the car literally stops "living". That is why the timing kit is one of the most important details that should not be forgotten, ignored or saved.
What is a timing belt and why is it needed?
Timing stands for "gas distribution mechanism". It is a system that is responsible for the precise synchronization of the movement of valves and pistons. Its main element is a belt or chain connecting the crankshaft and camshaft. This system also includes rollers and often a water pump.
Roughly speaking, as long as you press the accelerator pedal, the timing ensures the necessary engine power, proper valve operation and economical fuel consumption. One synchronization error can cause the motor to run erratically, stall, or fail.
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What is included in the timing kit
The contents of the kit depend on the specific vehicle and the supplier. In most cases, this is:
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The timing belt is the main element that synchronizes the rotation of the shafts.
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Tension roller — maintains the required belt tension during operation.
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The bypass roller guides the belt and ensures its stable operation.
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Water pump (pump) — can be part of the system (if the belt drives it as well).
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Fasteners — bolts, nuts, washers and studs (in some kits).
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Seals, washers, and oil seals are available in more expensive and complete sets.
Some manufacturers also add technical lubricants, installation instructions, and protective caps.
Why is it important to change the kit, not just the belt
It would be a mistake to assume that it is enough to replace one belt. If the roller is wedged and the pump is leaking, it can even cause the new belt to break. At the same time, the belt itself may not be able to withstand tension and break — the result will be catastrophic.
Plus: the belt and rollers are designed for approximately the same resource. Therefore, it is always more profitable and safer to change everything at once.
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When to change the timing kit
There are several landmarks:
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By mileage, on average, a replacement is required every 60,000—120,000 km. In diesel engines — more often, in gasoline — a little less often.
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Time—wise, even if the car doesn't drive much, the rubber belt ages. Every 5-6 years is a mandatory replacement.
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