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Mazda 3 rear shock top sheered off... #5384622 03/24/20 01:54 PM
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sky Offline OP
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This was pretty scary this morning when I was going to the store. I heard a crazy clunk that wasn't there before and I'm so glad this didn't happen on the highway. The car is a 2010 Mazda 3 up in MA. I'm going to order rear shocks, rear top mounts and rear billows for both sides. Does anyone know what bolt sizes they are? I want to replace those guys as well.

Watching videos, it seems easy enough to replace.

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Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384627 03/24/20 01:59 PM
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So nothing else was damaged?


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Re: Mazda 3 rear shock top sheered off... [Re: KGMtech] #5384636 03/24/20 02:07 PM
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sky Offline OP
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Stopped driving it immediately and looked around. There aren't any holes or anything I can see. What else should I be looking for? I'm going to put it up on jackstands to check it out when it's a bit warmer. I haven't had a chance to take a look at the other side.

Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384642 03/24/20 02:18 PM
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14Accent Offline
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Those are studs that are welded to the body. The nuts are 12mm. Use LOTS of penetrant and a little heat if necessary. You really don't want to break a stud.

Also, make sure and buy the updated steel upper mounts, the aluminum originals are the entire issue.


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Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384649 03/24/20 02:27 PM
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andyd Offline
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See why I hangout here? 11 minutes for good advice. grin2


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Re: Mazda 3 rear shock top sheered off... [Re: 14Accent] #5384664 03/24/20 02:50 PM
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sky Offline OP
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Originally Posted by 14Accent
Those are studs that are welded to the body. The nuts are 12mm. Use LOTS of penetrant and a little heat if necessary. You really don't want to break a stud.

Also, make sure and buy the updated steel upper mounts, the aluminum originals are the entire issue.


I purchased ones that were Moog on rockauto. Good to know. Should probably start using some penetrating oil right now. Thanks a bunch!

Re: Mazda 3 rear shock top sheered off... [Re: 14Accent] #5384668 03/24/20 02:52 PM
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Originally Posted by 14Accent
Those are studs that are welded to the body. The nuts are 12mm. Use LOTS of penetrant and a little heat if necessary. You really don't want to break a stud.

Also, make sure and buy the updated steel upper mounts, the aluminum originals are the entire issue.


Agreed on the studs. This easy job can go south pretty quick if one is not careful.

As far as the aluminum mount, my 06 spent 12 Canadian winters and it is fine, but I treated it with rust proofing oil every once in a while, along with the studs.


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Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384669 03/24/20 02:52 PM
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Just replaced the front struts (quick strut) and A-arms on our 2010 Mazda 3 with Amazon Moog parts.

Metallic front suspension knocking over the bumps went away once the parts were replaced. Sway bar end links were OK.

Parts perform well so far.


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Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384680 03/24/20 03:06 PM
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Start watching South Main Auto videos on Youtube to get some fastener removal tips. He's in upstate NY, so he gets his fair share of rusty, crusty cars and fasteners.


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Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384691 03/24/20 03:24 PM
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whatnext Offline
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Oh Oh, have a 2012 Mazda3 in the rust belt of NY. Will check mine soon and clean those studs.

Thanks for the heads up.

Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384697 03/24/20 03:34 PM
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This happened to my daughter's 2006 Mazda3 - 3X's
They're reasonably priced, easy to replace and you can do it yourself. As long as the studs are in good shape you're good to go. Just don't over torque'em otherwise you'll crack those mounts at the bolt hole(s).

Last edited by Char Baby; 03/24/20 03:37 PM.

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Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384759 03/24/20 04:42 PM
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whatnext Offline
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Just checked the ones on my 2012. Very little rust on them but will oil them up. Maybe even run the nuts down and back on the studs.

Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384760 03/24/20 04:44 PM
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grin2

Last edited by andyd; 03/24/20 04:45 PM.

'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Mazda 3 rear shock top sheered off... [Re: sky] #5384904 03/24/20 07:45 PM
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14Accent Offline
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Originally Posted by sky
Originally Posted by 14Accent
Those are studs that are welded to the body. The nuts are 12mm. Use LOTS of penetrant and a little heat if necessary. You really don't want to break a stud.

Also, make sure and buy the updated steel upper mounts, the aluminum originals are the entire issue.


I purchased ones that were Moog on rockauto. Good to know. Should probably start using some penetrating oil right now. Thanks a bunch!


Looks like the ones I use at work are Dorman 924-412HP's. They fit just fine and I haven't had any issues with them. I wish I could say that for all Dorman products...


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Re: Mazda 3 rear shock top sheered off... [Re: 14Accent] #5384911 03/24/20 07:51 PM
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whatnext Offline
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Originally Posted by 14Accent


Looks like the ones I use at work are Dorman 924-412HP's. They fit just fine and I haven't had any issues with them. I wish I could say that for all Dorman products...


Yeah, I'm leary of Dorman products too.

Last edited by whatnext; 03/24/20 07:52 PM.
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