Opel smoking exhaust Driving buses Buses are one of the most important means of communication. Thanks to them we can quickly get to a certain place without thinking about parking and so on. To become a bus driver it is necessary to invest i
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oil for Opel The opening and closing of the valves The cylinder head is attached to the engine block by numerous bolts or studs. It has several functions. The cylinder head seals the cylinders on the side opposite to the pistons; it contain
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