dan - yes - it may not seem plausible right away, but it is if you think about the fact that the entire drivetrain is solidly locked together. when you lift or drop one end, it has an affect on the other end. i have seen the exhaust hit things and make a racket after the car warmed up. i have seen the motor mounts sag when warm, and cause the exhaust to hit the lower brace. this kind of thing is especially true of tiptronic cars, where the transmission is much heavier, but most of the supporting parts are no different.
there are plenty of things that change as things warm up. i could even do the math to tell you how much the motor mounts change in height relative to heat expansion (though it would give me a mean headache and cost me a few bottles of wine). the concept is pretty basic stuff any mechanic should know and be able to measure though. that's why there is a minimum tolerance measurement on the mounts. they take into consideration the change due to heat.
the first thing i would do is verify the part numbers of the motor mounts, and measure them. then, i would inspect carefully the exhaust hangers.
94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating
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