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Re: Motor Mounts - What should I know about them? Posted by Ari [Email] ![]() ![]() In Reply to: Motor Mounts - What should I know about them?, Bill Fournier, Mon, 13 Dec 2004 10:47:37 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The car has three lower mounts and an upper torsion bar. One lower mount is under the transmission. The other two are under the engine, on the right hand side (facing forward). At the top of the engine is a torsion bar with two rubber bushings.
A sign of bad motor mounts is excessive engine motion during shifting. With a manual tranny, this can cause hard shifting. You can also get different amounts of vibration at idle. You'll also get some strange sounds when getting on and off the gas.
Checking the upper bushings is easy - open the hood and look at the rubber. The rubber kind of looks like a capital "I", just very thick. Look for cracks in the rubber of the arms. A few small cracks are normal. If the rubber is half-way or more cracked through, that's a bad sign.
Lower mounts are a little more trouble. Get a flashlight. Look straight down between the belt side of the engine and the fender, right behind the coolant reservoir. At the right front bottom of the engine, you'll see a rubber circle with a bolt through it, the bolt attaching to the engine. The rubber should look in good condition - no cracks.
The rear engine mount is a little more trouble. Turn the wheels all the way to the left. Look in through the hole in the fender well where the driveshaft comes through for the right wheel. About a foot in you'll see a bolt straight up and down, attached to an engine bracket, stuck in a rubber pot. That's the rear mount. Again, look for cracks.
The ideal way to check the mounts is to stick a prybar between the engine and the chassis, and lift the engine. With a bad mount, the bolt comes up, but most of the rubber stays put.
If you have an automatic tranny, it's a little easier. Start the car, and have an assistant help you. With your assistant's foot FIRMLY ON THE BRAKE, and the parking brake on, have the assistant shift from Park to Drive, and between Drive and Reverse. Look down at the front motor mount. I think you understand why FIRMLY ON THE BRAKE is necessary, and I hope you don't have any big life insurance policies where your assistant is the beneficiary. You should see some movement in the motor mount - that's OK. But if you see the middle of the motor mount lift out, that's the sign of a bad mount. I've seen it where the bolt just has a little rubber on it, and it lifts easily in and out of the base in the chassis.
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