V8 Miata Drivetrains Everything behind the flywheel that takes the power to the wheels.

Rear bearings destroyed

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Old Mar 11, 2013 | 08:37 PM
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Default Rear bearings destroyed

This is what it looks like when you tighten axles and forget spacers. Bearing retainers seperated. The outter bearing is stuck to rotor!

These were bought broached from Martain. When I take them in to get new bearings, is there anything special to request? Are they stock Miata bearings?

I'm kinda confused at what I'm looking at. Where is the splined part supposed to be? Anyone have pics of there broached hubs before install?



Attached Thumbnails Rear bearings destroyed-image_zpsf073587f.jpg   Rear bearings destroyed-image_zps42994dd5.jpg   Rear bearings destroyed-image_zpsee980345.jpg  

Last edited by Gunpilot; Mar 11, 2013 at 09:03 PM.
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Old Mar 12, 2013 | 06:37 AM
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Bearings are likely fine, looks like you only need new seals. The inner bearing race is a pressed fit, to remove without a press and appropriate tooling requires a hammer and chisel and sometimes heat from a torch. The broached hubs pretty much look just like the stock hubs, it's just that broaching re-splines the hubs for the larger axles.

Good luck, RR
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Old Mar 12, 2013 | 07:10 AM
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The seals are part of the sealed bearing (except for the dust seal that attaches to the knuckle). Once they come apart, they are usually ruined.
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Old Mar 12, 2013 | 07:13 AM
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Use the old bearing as a "special tool" to press the new bearing in.
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Old Mar 12, 2013 | 10:50 AM
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Yeah, I looked at a bunch of pics this morning and figured it out. Gonna remove c-clip and hammer out old bearing and press new bearings in. The outter retainer stuck on the hub is gonna need attention from a chisel.

What is the dust seal you speak of? Is it something I should purchase with the bearing? This thing fell apart in 5 pieces when it came off (my first picture), so I am trying to determine what was internal to the bearing and what was a seperate piece.

As far as I gather steps are- press bearing into knuckle, press hub into bearing, reinstall on car. Include spacer THIS time for proper fitment before insering into hub.
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Old Mar 12, 2013 | 02:36 PM
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There is a seal that goes onto the knuckle after the bearing is installed. The outer diameter of the spacer rides on the inner part of the seal to keep water & dirt out of the bearing. OIL SEAL (G304-33-065) - $9.36 - G30433065
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Old Mar 13, 2013 | 03:54 PM
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Back in business. Thanks for all the help.
Attached Thumbnails Rear bearings destroyed-image_zps3215b328.jpg  
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Old Mar 16, 2013 | 06:43 PM
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Living in the northeast I am so shocked to see those dust covers without rust. I am never buying a donor car in this part of the country again.

-Jason
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Old Mar 16, 2013 | 08:41 PM
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Originally Posted by MRM331
Living in the northeast I am so shocked to see those dust covers without rust. I am never buying a donor car in this part of the country again.
-Jason
Two thumbs up to that! Mine came out of VA and it is a disaster. I've had more bolts break than come loose so far.
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Old Mar 16, 2013 | 09:27 PM
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Originally Posted by charchri4
Two thumbs up to that! Mine came out of VA and it is a disaster. I've had more bolts break than come loose so far.
I can so relate, my car had time in Illinois, the only reason I haven't pulled the front sub-frame and installed a rust free freshened and improved one is fear a critical bolt will break. Every major fastener I've dealt with has been a huge challenge.

I've cut out all the body rust and welded n new metal, replaced the rear sub-frame due to rust but on the front, I'm just coasting along with if it ain't broke, don't tempt fate.
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