Tapping/buzzing sound at first start up!

   / Tapping/buzzing sound at first start up! #11  
My MX5100 makes the same sound at start-up during cold weather. I also had Rotella 15w-40 in it. I switched to to Rotella full synthetic 5w-40 for better cold wx starting. The noise is greatly reduced and clears up quickly. I'm going to stick with the synthetic from now on.

HP
 

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