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A gear train is one way to keep the valve train in synch with the crankshaft, which is essential for engine operation. If your car uses gears, that means that the gears get a lot of wear, which might mean readjustment every once in a while, and replacement after so many miles. Find a good mechanic for that type of car, and ask. some engines have timing gears that mesh some engines have a timing chain and some have a timing belt.as for timing maintaiance, once timing is set, unless something breaks or distributer is removed, u should neve have to touch you timing.PS. timing gears are so much better than chain or belt, but not many engines made like that anymore

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Q: If an engine has timing gears but not a timing belt does this mean the engine will not require any timing belt maintenance or do all engine have belts or chains?
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