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Re: Engine Movement- why allowed? Posted by Ari [Email] ![]() ![]() In Reply to: Engine Movement- why allowed?, Sam, Sun, 30 Oct 2005 05:23:59 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Saab didn't design in travel beyond the compliance of the mounts when new and in decent shape. As the mounts age, the rubber gets brittle, and the extra movement that comes with the upper mounts aging and cracking speeds up the demise of the lower mounts. They didn't design the mounts to last for 200K miles; again, a trade-off.
Why build in any movement? Vibration and harshness. The engine is the major source of vibration, and even with balance shafts, a big (and 2.3l is big) 4-cylinder vibrates. Most buyers don't want that extra vibration, so Saab went to great lengths to isolate it - hydraulic mounts, and the engine is mounted on a sub-frame.
If you want a more closely-coupled feel, you can always swap out the hydraulic mounts for solid rubber. Hard shifts will be smoother, but you'll get more vibration at idle and at speed. If that doesn't bother you, go for it. But I know with the CSE my wife uses for everyday shopping and to shuttle her 80-year old mother around, the smooth feel of the stock hydraulic mounts is great. To each their own.
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