Motor Mounts

[ckirschvink]

Hey there,
I’m a 2014 Sonic 1.8L automatic hatchback LT owner. At about 116k miles right now.

I’ve noticed some symptoms that lead me to believe I have at least one bad motor mount:

-excessive vibrations at idle while I’m in reverse or drive
-an occasional clunking sound while driving at slower speeds
-feeling the car move when I put the car into drive, or when the transmission shifts while driving at lower speeds

I was trying to determine which motor mount I ought to replace. I heard the passenger side is common to fail. I want to avoid having to do them all, as it is more expensive and time consuming.

i took some videos of the engine while shifting gears and power braking. It seems to move a couple inches up and down when doing these things, but I’m not sure if this is normal behavior.

I’d appreciate any help in determining the issue.

 

[Mike1955]

Safe to change all three with GM parts. The cost for all 3 is under $150. Just be sure to provide the VIN on these sites to get the correct parts.

 

[Dingleberry69]

Hmm that being said, is there any difference between the RS/LTZ engine mounts and the stock LT mounts. Looking to get a mount that will work, but that is slightly stiffer than the stock LT mount, without having to go with the aftermarket units. Would like to stick with genuine GM, as this will be on a daily driver.

also would they be interchangeable like that. I’m rock auto terms, looking for the mount with the non soft ride suspension, even though the suspension in the car is soft ride.
Does anyone think this is doable?

cheers folks (and hopefully i didn’t just inadvertently hijack this thread, if I did, my apologies)

 

[JTee2017]

Hmm that being said, is there any difference between the RS/LTZ engine mounts and the stock LT mounts. Looking to get a mount that will work, but that is slightly stiffer than the stock LT mount, without having to go with the aftermarket units. Would like to stick with genuine GM, as this will be on a daily driver.

also would they be interchangeable like that. I’m rock auto terms, looking for the mount with the non soft ride suspension, even though the suspension in the car is soft ride.
Does anyone think this is doable?

cheers folks (and hopefully i didn’t just inadvertently hijack this thread, if I did, my apologies)

Just look up the motor mounts after entering in your VIN at a few GM parts websites.
You should come up with a consensus of part numbers.
AS long as you have the 1.8L engine that this thread is about. Not the 1.4L engine.

 

[Dingleberry69]

Just look up the motor mounts after entering in your VIN at a few GM parts websites.
You should come up with a consensus of part numbers.
AS long as you have the 1.8L engine that this thread is about. Not the 1.4L engine.

Thank you. Will try. It is a 1.8l in question.

 

[Dingleberry69]

Yeah came to the decision that I will replace with stock if the mount requires replacement, if it’s still in good shape I’ll just reuse it.

 

[hawkeye75]

They recommend doing all 3 at the same time, but if you only want to do one, I'd recommend the rear transmission mount. It's the one at the bottom that keeps the transmission attached to the frame. I had to get a shop to do that one after doing the other two mounts myself and it's significantly improved any movement when changing gears and braking.

 

[Dingleberry69]

They recommend doing all 3 at the same time, but if you only want to do one, I'd recommend the rear transmission mount. It's the one at the bottom that keeps the transmission attached to the frame. I had to get a shop to do that one after doing the other two mounts myself and it's significantly improved any movement when changing gears and braking.

cool beans, good to know. They all seem pretty solid for now, so I’ll leave em for now. But when it comes up, illl definitely do alll 3.
Thank you