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What is the cause of loud noise when the engine starts the first time of the day?

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2009-01-16 14:57:20
2009-01-16 14:57:20

Possibly, a misfortunate cat sleeping under the hood. This bang is probably a loose engine mounting bolt. The noise is probley from bad rod bearings once the oil pressure is up they quiet down.After it sits a long time(over night) the oil drains down and will be noisy It may last a long time just make sure the oil level is good

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