Thread: Is my lower motor mound bad?

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  1. #1 Is my lower motor mound bad? 
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    Guys, need your expertise. Have searched this forum (and others) and not finding a lot of info for diagnosis. Here's what happened.

    I noticed my '04 GTP CompG making a clunking (maybe even a dull popping) noise, particularly when I went over bumps. Seems to be coming from right front. My first thought was suspension but on my ride home, I noticed it would do it if I rolled off the gas quickly so that was steering me away from suspension. I pulled the passenger front wheel off today and checked the sway bar end links - good. Tie rod end - good. Pulled the cover to access the mount and I don't know if its good or bad???

    There are no obvious tears in the rubber that I can see. I put a jack and wood block under the oil pan and jacked it up a little bit. The mount came up maybe 1/2". Does this "play" mean its shot? As I understand it, it's a hydraulic mount so I figured there would be some give but I dunno if that's too much? Any other tests?

    I guess another way of posing the question is this - should the mount "collapse" a half-inch or more under the weight of the engine?

    I also tried revving the engine in park with the hood up and there is movement in the engine. Dunno how relevant this is.

    I know it's cheap insurance to replace it anyways, but it looks like a mild PITA to do so I'd rather not if it isn't the source of the clunk.

    Let me know what you guys think and thanks in advance!

    P.S. One other thing. If it is shot, do you recommend going to a solid replacement? Preferred brand and part number?
    Last edited by LipschitzWrath; 08-20-2014 at 06:58 PM.
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