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Ask Honest John - Why is my engine making a knocking sound when cold?

I have a SEAT Leon 2015. When cold there is a knocking noise coming from the engine. It sounds like it is in the area in ...
Star Tribune

Knock knock is no joke if it comes from your engine

Q I have a 2005 Ford Explorer V6 with 75,000 miles. The engine knocks when first started in cold conditions. As it warms up, the knocking dissipates. I tried using synthetic oil, but it hasn't helped.