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Old 03-21-2013, 03:44 AM   #1
dictoresno
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Default Wheel bearing replacement quick question

i plan on giving my buddy my new knuckle, seals, bearing and hub to press it all together at his shop before we disassemble my car. now the brake dust shield doesnt need to be included with the knuckle assemble right? i havent had a chance to look at my car yet, but he is under the impression we need to remove the shield first in order to assemble the new knuckle. but doesnt it just bold to the back of the knuckle? we can preassemble it first without needing the shield to do so right?
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Old 03-21-2013, 06:27 AM   #2
mhoerath
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Quote:
Originally Posted by dictoresno View Post
i plan on giving my buddy my new knuckle, seals, bearing and hub to press it all together at his shop before we disassemble my car. now the brake dust shield doesnt need to be included with the knuckle assemble right? i havent had a chance to look at my car yet, but he is under the impression we need to remove the shield first in order to assemble the new knuckle. but doesnt it just bold to the back of the knuckle? we can preassemble it first without needing the shield to do so right?
the shield bolts to the knuckle and can be removed/replaced later.
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Old 03-21-2013, 04:32 PM   #3
dictoresno
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the shield bolts to the knuckle and can be removed/replaced later.
thank you, thats what i thought and was hoping for.
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Old 03-21-2013, 08:17 PM   #4
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Is this on the front or rear?
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Old 03-21-2013, 11:52 PM   #5
dictoresno
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front left.
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Old 03-22-2013, 10:59 AM   #6
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You'll be okay. The rear shield is installed before the hub is pressed in.
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Old 03-23-2013, 03:39 PM   #7
dictoresno
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Wait so the shield can be installed after the hub is pressed on the front but for the rear it has to be done before pressing?
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Old 03-23-2013, 10:37 PM   #8
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Why all the extra parts? A bearing is not bad. Unless he ran it too long you shouldn't need a hub.
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Old 03-23-2013, 10:40 PM   #9
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Originally Posted by dictoresno View Post
Wait so the shield can be installed after the hub is pressed on the front but for the rear it has to be done before pressing?
Correct. The front shield simply bolts onto the knuckle and is accessible anytime the rotor is removed.

The rear shield is actually spotwelded to the backing plate (which the caliper mounts on) which gets bolted on between the knuckle and hub.
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Old 03-25-2013, 10:07 PM   #10
dictoresno
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Why all the extra parts? A bearing is not bad. Unless he ran it too long you shouldn't need a hub.

due to a minor curb crash years ago, i have a feeling the hub may be slightly bent. well here is an update.....

i pulled the old knuckle (drivers side) out the other day. the hub had enormous amounts of play while still pressed into the old bearing/knuckle. fine, i assumed it was going to be bad and think this is whats causing my car to chew through rotors. i go to replace it with the new knuckle/bearing/hub i got but then realize that the dealer gave me the RIGHT side one, not the left as i ordered. so now im screwed. its 4pm on sunday and have no idea what to do. i didnt want to press out the new assembly and take the chance of ruining it, ill potentially just use it on the right side. so i goto a local autoparts store and buy another bearing to hold me over to press into my old knuckle. once its pressed, theres still a slight wobble of the hub in the bearing. its nowhere near as bad as the original bearing which had alot of slop, but still a couple of millimeters of up/down and in/out play. the new subaru knuckle/hub/bearing has ZERO play and is completely tight. so my question is even with the new off-brand bearing in my old knuckle, i assume this play isnt normal. do you guys think the knuckle is indeed messed up somehow? this is why i wanted to replace it, but cant figure out where this slop is coming from, even though it was all tightly pressed together.

the dealer agreed to get me all parts again including the correct knuckle, so when it comes in, ill take out the old one with the play and install the OEM subaru parts.
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Old 03-25-2013, 10:18 PM   #11
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Sounds like the knuckle is screwed. But I have seen bearings pressed in to what seemed tight but wasn't.
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Old 03-25-2013, 10:19 PM   #12
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No the play is not normal and won't get better
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Old 03-25-2013, 10:41 PM   #13
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well i was shocked to see even a slight play into the newly pressed National brand bearing into my old knuckle. like i said, the new knuckle/bearing/hub from subaru is perfectly tight with no play. i guess something is definitely wrong with the knuckle itself. hopefully the dealer will send me the new, corrected parts soon so i can get this over with. its also weird seeing how the play is not only up/down but also a few mm's in and out....even though everything is fully pressed. makes me think the "new" bearing or old hub is messed up. not to mention, while pressing in the bearing, it went extremely smooth and almost dropped in with little resistance. the OEM new stuff made alot of creaking. and yes, im sure the National bearing was the correct one. it almost seems like the knuckle is oversized for the bearing now.
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Old 03-29-2013, 09:04 AM   #14
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Originally Posted by dictoresno View Post
well i was shocked to see even a slight play into the newly pressed National brand bearing into my old knuckle. like i said, the new knuckle/bearing/hub from subaru is perfectly tight with no play. i guess something is definitely wrong with the knuckle itself. hopefully the dealer will send me the new, corrected parts soon so i can get this over with. its also weird seeing how the play is not only up/down but also a few mm's in and out....even though everything is fully pressed. makes me think the "new" bearing or old hub is messed up. not to mention, while pressing in the bearing, it went extremely smooth and almost dropped in with little resistance. the OEM new stuff made alot of creaking. and yes, im sure the National bearing was the correct one. it almost seems like the knuckle is oversized for the bearing now.
Hub. Happens on Toyota a lot, I haven't had many issues with subarus, but it's not unheard of. If you let the bearing go for too long it can "widen" the hub ever so slightly.
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Old 03-29-2013, 09:44 AM   #15
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I've herd of Subies eating hubs, but not knuckles...

MY00 ate both front hubs...
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Old 03-29-2013, 10:29 PM   #16
dictoresno
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well my hub didnt look like that, but i got all the new parts i need. so ill be replacing both left and right knuckles, hubs, bearings, seals and ball joints. i just hope this will finally also fix my rotor issue as well.
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