Bad vibrating at idle

[thorracing271]

My mom has a 06 Mazda3 hatch with 50,000 (i think). The car is bone stock, but has recently started shaking violently while idling. It goes away right when you step on the gas.
Do you guys have any ideas on where I should start?

 

[Falango]

Motor mounts?? They are known to tear open on the 3.

 

[thorracing271]

Motor mounts?? They are known to tear open on the 3.

I saw many people complain about this when I did a google search. Mostly about the vibration happening above 55mph.
A way to test this would be wait for the vibration to start at idle, and then put the car in neutral, correct?

 

[Falango]

Yep. The engine would be under a bit of load, then suddenly off. You could just do a visual inspection of the mounts too. Feel around for any tears on the rubber. Pretty sure they are liquid filled too, so feel around for any leaking fluid.

 

[thorracing271]

Will do, anything else I should check? IAC, EGR? I know those are more common problems on the Protege's

 

[thorracing271]

just looked at moms car, the passenger side motor mount is gone bad (i think)
I could see liquid that was dripping from the motor mount and is now covered in grease and grime. Anyone know which motor mount i should buy to replace this?

 

[thorracing271]

Bumppity buump bump.

 

[Falango]

If the car is still within warranty, go get yourself a free one. I am 99.9% sure there is a TSB for this. I believe that as long as the car is within the powertrain warranty, it's a warranty replacement.

 

[vladjan]

motor mount... i had the same problem... i replaced my motor mount twice!!!!!

 

[thorracing271]

ya i know for a fact the motor mount is toast. Now the question is....where do i get a new one, and what company should I buy? Looks like the popular pick is AWR.

Also what stiffness should i get?

 

[Falango]

Is the car still under warranty???

 

[thorracing271]

Is the car still under warranty???

Sorry, i forgot to answer that question. The car is NOT under warranty

 

[Falango]

Then ya, go aftermarket for sure, lol. I have AWR mounts in my Protege and they have been great. Can't really comment on aftermarket mounts for the 3 though.

 

[thorracing271]

Ya i figured AWR was the way to go, i just need to know what thickness to get now

 

[steven05091983]

yo i just made a full blog about diffrent symptons of a blown motor mount I also put up pics and tip to check and pin point the vibration. check it out at http://estovideorepairs.com/

 

[L3vzoomzooom]

Street unit has mounts for the MZ3 as well. I'm 90% sure my mounts are done too.