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knocking on cold engine 2009 Highlander

  

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Bought a 2009 Highlander limited (3.5L v6) with 190K miles. Runs fine so far. Now that it's getting cold, the engine is knocking a bit at cold start, but goes away as soon as it warms up. Didn't happen at all when the weather was warm. What is that and what should I do about it?

Thanks!


1 Answer
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They should not make noise I would change the oil and filter and pray that one away from dirty. If not make a video and put it on YouTube and post the URL here


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