John M Venice , FL May 03, 2016 Microwave was rumling as it tuned Thought it must be the motor so I replaced it which was very easy but did not cure the noise. Decided all that was left was to replace the ring even though I could not see anything wrong with it. Replaced ring problem solved 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes