Timing belt kit Type 25 D/TDTiming belt kit The timing belt is an essential part on Type 3 diesel engines and makes that transmission is adjusted on each other of cam shaft, injection pump and oil pump through the crankshaft. This driving belt should always be in perfect condition to fulfill its important function and heavy duty. When the belt breaks while the engine is turning, it can provoke damage to cylinder heads, valves.. We recommend to replace this belt every 120. 000km