Rod Stevens Posted August 7, 2022 Report Share Posted August 7, 2022 I get a thud underneath the front on my 2004 Cadillac DeVille when I let off the gas and then accelerate again. It feels like a mount is loose maybe. It rides and steers just fine. Any ideas on what to check? Thanks! Quote Link to comment Share on other sites More sharing options...
RubberCarrot Posted August 7, 2022 Report Share Posted August 7, 2022 Back in the late 60s Chevy had all kinds of problems with motor mounts. Same symptom with the added thrill of pulling the shifter out of gear. Used to be able to see it by looking under the hood through the gap when it is open. Put it in gear, hold the brake and give it a little gas. If the engine does more than rock a little you probably have a mount problem. With the old Chevys, it was usually the driver's side mount, and the engine would lift 2 or 3 inches with just a little gas. If you don't see it readily try reverse, same thing. Not sure how that transverse mounted engine should behave but it seems the rules would be the same. You could also have someone stand to the side and observer the engine while you try the test but what fun is that? Quote Link to comment Share on other sites More sharing options...
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