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:Tech Tips: TIMING BELTS Always ensure the correct belt is selected. There are now a number of different tooth profiles and belt widths. Replace the belt in accordance with the vehicle manufacturers recommendations for mileage and / or time. In the majority of cases, failure of the timing belt will result in valve and piston damage. It is recommended that front crankshaft and camshaft oil seals are replaced, together with the belt tensioner and / or idlers when the belt is replaced. Failure of a belt because of oil contamination or a worn or damaged tensioners is not covered by warranty. Robbos Spare Parts supply Timing Belt Kits which are available with and without the tensioners. Both kits normally include the oil seals. When fitting, make sure the belt is set up, including the belt tension, in accordance with the vehicle manufacturers specifications. Failure to do this will result in the premature failure of the belt. TIMING CHAINS When replacing timing chains, invariably the tensioners and guides, and often the gears will also be worn and should be replaced at the same time. The oil pump should also be inspected for wear as low oil pressure is often the cause of timing chain and gear failure, particularly where the tensioner is controlled by oil pressure. This is particularly so in some Mitsubishi Magna and Sigma vehicles where premature failure of the timing componentry is usually traced to a worn oil pump. Some engines have quite complicated timing systems, especially where balance shafts and oil pump drives are included, so it is imperative that the vehicle manufacturers installation instructions are followed exactly otherwise engine damage could easily occur. This information was supplied by Gasmiser, suppliers of Gasmiser Timing Chains and Optibelt Timing Belts.
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