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What drives oil pump on a 1990 2.6 leter Isuzu 4ze1 engine?

The oil pump on a 1990 2.6-liter Isuzu 4ZE1 engine is driven by the crankshaft. The crankshaft is connected to the oil pump by a timing belt. As the crankshaft rotates, it turns the timing belt, which in turn drives the oil pump. The oil pump then draws oil from the oil pan and circulates it throughout the engine.