No noise or vibration symptoms. How many motor mounts are on this car? What is the estimated cost for repair/replacement at a Southern California qualified corner mechanic (not a dealer)?
SOURCE: THUMPING SOUND WHEN I LET OFF GAS HOW DO I REPLACE MOTOR MOUNTS
The diagnosis sounds OK but if you have no experience with auto repair, I recommend you invest in an after-market service book for your car.
Haynes has it on line for $25 but you should be able to buy it locally from any chain auto parts store.
You can see it here:
Deville repair manual
It will pay for itself many times over and even if you don't DIY, it can help you determine if the repair shop is asking a reasonable price for a repair.
SOURCE: Cadillac Engine Mount.
It has two motor mounts and the answer to your question will it make it jump..Its possible if its completely broken. I would suggest that you check transmission mount too. Good Luck and thanks for using FIX YA
SOURCE: How do I R&R front motor mounts on 2000 cadillac sts
Very easy, just remove front tires and unbolt, BUT I doubt you are asking right question. Not mounts, but mount in dead front center is problem. There are 4 mounts, transmission center back, left center and right center and front center. That takes full torque of motor and heat from exhaust. GM has a shield for exhaust.
SOURCE: I need new front struts, back air shocks, and a engine mount
If you are looking to replace the shocks on this Deville, you could be looking at a price that you may not like. With all the different components to the air ride system it is a good idea to go with a conversion kit that allows you to get away from the air all together by using a coil spring conversion. Strutmasters offers great kits at a great price with a lifetime warranty. I would rather pay half the price to fix my car and have the parts be warranted than buy expensive parts for the car not knowing its going to fix the problem and have no warranty with it. Check them out!
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