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What could be the cause of a cold start rattle on my 1999 Lexus ES300?

  

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When I first start my car in the morning or anytime cold there is a loud rattle from the engine. It then goes away after about 15 seconds. 173,000 miles. oil at around 2500 miles.


3 Answers
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high mileage engine. If it goes away quickly then don't worry too much.


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Your timing chain, tensioner and guides need replacing, and real soon.


No timing chain it has a timing belt


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It might be due to the lack of lubrication during cold start, since it goes away, I would not worry about it, but if it bothers you, you can add some Lucas oil additive for the next oil change to help the situation. 


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