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Re: cheap motor mounts?
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Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Wed, 7 Nov 2001 17:12:23 Share Post by Email
In Reply to: cheap motor mounts?, supersaaber, Wed, 7 Nov 2001 10:56:58
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I haven't tried them - I usually buy from Sobstory. But -
To echo Gene - it isn't a quality issue, it's a type issue. The original motor mounts are hydraulic; there is a bag of goo inside the mount. Some aftermarket mounts are solid - just hard rubber all the way through. The advantage of the hard mounts are that they are cheaper, and the are stiffer. Stiffer is great for performance installations where extra torque can really sling the engine around.

The drawback of the stiffer mount is that it transmits more vibration; the hydraulic mounts transmit very little vibration. The amount of vibration varies from engine to engine. The warning here is that if the cheaper mounts are solid, you might find the vibration objectionable. Or you might not - maybe your particular engine is smooth, or your threshold of vibration is pretty high. But you won't know. I installed aftermarket upper motor mounts (torque arm) in two almost identical '88 9000T's. One idled nice and smooth. In the other, at idle the steering wheel vibrated like a paint mixer. I'm not talking about a little annoyance here - I'm talking about numb hands after 5 minutes.

Ask them if they're selling solid or hydraulic mounts. If they're hydraulic, go for it. If they're solid, realize that you are taking a chance. I've always gone for hydraulic mounts, because the price of the mounts is small compared to the hassle of the installation. It's not a job I want to do twice if the mounts turn out to be too stiff.

just my $0.02

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