DIY - Replace Wheel Bearing - Scion tC Forums

Old 05-06-2014, 02:52 AM Thread Starter
Ignorance-intolerant

Join Date: Jul 2009
Location: Monroe, MI
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DIY - Replace Wheel Bearing

Alrighty so recently started hearing a loud roaring-noise coming from my driver's front wheel. Being at 125k miles, my first thought was that my wheel bearing was going out. I double checked with my mechanic and we took a drive--he agreed with me. To cut cost, I decided to pull out the knuckle myself and pay my mechanic to press the old bearing out and the new one in. I had some trouble finding any DIY online, and actually had a lot of help from this thread here but there weren't enough pictures for my liking. SO that being said, here's my own DIY, lots of pictures!

**DISCLAIMER**
You are taking your own car in your hands here. I'm not responsible if you break an axle or do something wrong. This is just documentation of how I did the work.

What you'll need for the swap:
New bearing -- I bought mine from Autozone. Like $35. I went with the cheap option because I'm selling the car soon and I don't want to put too much money into it. 12pt, 30mm DEEP socket for the axle nut -- I had to pick one up from NAPA for ~$14
Your lug wrench for removing the wheel
A breaker bar for the axle nut
Jack stands and a Jack
WD40/Rust-cutting-spray -- I used some carburetor-starter I had. Basically pure-petrol spray
10mm socket
12mm socket
17mm socket
22mm socket

Needle nose pliers
(Optional: 2x M8-1.25x20mm bolts for removing the caliper from the knuckle)

Step 1!
Take your tire off, remove the center-cap, set aside.

Step 2:
Unstake the axle-nut. You'll see that it has an indent in it in order to prevent the nut from spinning off the axle shaft.

TO do this I used a small crescent wrench and slowly tapped it out so it was round. You run the risk here of flattening the teeth on the nut--that's why they make unstaking kits for them--but my way seemingly worked just fine. Here's the unstaking process

You can see where I may have stripped the threads a bit, but after checking the nut afterwards, it still held just fine.

Step 3:
Put the tire back on (you don't have to put ALL the lugs back on, 3 should be sufficient), lower the car back down, and get your beaker bar and 12pt, 30mm deep socket. Time for some muscle. Spray the bolt with some rust cutter and wait if you want before you get to work on it.

Step 4:
Once the nut is off, take the tire back off. Put the front end up on jackstands.
Grab your 17mm wrench and remove the caliper from the knuckle.
Use your 12mm wrench to remove the brakeline from the strut.
Apparently I neglected to photograph this part. There are two bolts, one on the top and one on the bottom. And one holding the brake line to the strut.
Set the caliper aside and make sure NOT TO KINK THE BRAKE LINE. We're lucky enough to have enough brake line to lower the caliper all the way to the ground so you don't have to tie it up. I placed mine on a sandal and as far away from the area I was working on as I could.

Step 5:
Grab your 10mm and 12mm sockets. We're removing the ABS sensor.
The sensor is on the rear-half of the knuckle. You can follow the blue wire to find it. The 10mm bolt secures the sensor to the knuckle, the 12mm bolt (which you removed to move the brake line) should be off by this point, giving you some play with where you can place the sensor that's safe. I tucked it into a bit of the splash guard. Make sure not to pinch or kink the wire. These are expensive sensors!

Step 6:
Take off the two 22mm bolts holding the strut to the knuckle.

I stuck one bolt back in after I removed them so I could work on the other parts without having the knuckle fall on my face.

Step 7:
Get your 17mm socket for the tie-rod bolt.
There's a cotter pin you have to remove from the castle nut (the nut that looks like a castle...go figure) before you can remove the bolt. Save the pin if you want to reuse it, or buy a new one to put in when you reinstall the knuckle.

Once the cotter pin is out and the nut is off, you've got to remove the tie rod bolt. This is pain in the butt because the bolt tapers down to where the threads are, so you'll either have to use a tie-rod-fork or take a cold chisel and place it on the top of the bolt, and hammer it down and out (this is what I did, it might take a few whacks).

Step 8:
17mm socket to remove the lower ball joint attachment. There are two bolts and one nut.

Press down on the arm there or use a pry-bar to get the joint apart. It was a little pain in the butt but it'll come out.

Step 9:
Then remove the 22mm bolt you placed back into the knuckle to keep it in place, and remove the knuckle from the car. It'll take some wiggling but once you have every thing removed, it'll come out.

One of the most annoying bits of removing the knuckle was getting the actual axle out. Again, it tapers down to the axle-bolt/nut, so you'll either have to knock it out, or pry the knuckle off. As I don't want to damage transmission internals by hitting the front of the axle, I used the hole the ABS-sensor came out of, stuck a screwdriver in there, and it popped out relatively easily.

Here's the wheel area without the knuckle, and the knuckle itself:

Step 10:
Remove the brake disk from the knuckle. You can either whack the crap out of it and use a bunch of rust-cutter to knock it off (because it's honestly just held on by rust) or you can use those two "optional" bolts I talked about earlier. You'll note there are two holes in the caliper where the lug-bolts DON'T poke through, screw the bolts into those holes and wrench them down until it pops the brake disk off of the knuckle.

Step 11:
Get your bearing pressed out at a shop. My guy charged me $40 to do it--make sure to shop around though. Conclusion: All in all it took me about 2 hours to remove the knuckle. Not too bad for saving probably$200 on labor to take it out and put it back in (which only took about an hour). It was a fun project, just make sure you have your tools on hand before you start, or else you'll be running around town to find a giant 12pt, 30mm DEEP socket.

And remember, when working on your car remember the most important rule: have fun and be yourself.

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Old 05-06-2014, 11:54 PM
Destroyer of Cones

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I will add one anal correction .. that is an open ended wrench you used to unstake .. not a crescent wrench Typically Crescent wrench (actually a brand name) is used to describe an adjustable wrench.

Good writeup though. They make tools for pulling the bearing yourself, but most places dont have a hub tamer for rent and they are not cheap to buy, so normally taking the knuckle in to have he bearing pressed out\in is the way to go. I have had to replace the drivers side on mine.

"I am not flipping you off. I just want to punch you in the face so bad that my fist has a boner"

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Old 05-08-2014, 11:15 PM Thread Starter
Ignorance-intolerant

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I also realized that there is a DIY section I totally forgot about...so if a Mod would kindly move this thread there and delete this post? <3

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Old 03-22-2015, 01:07 AM
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Good DIY but few suggestions!

I just did front wheel bearing replacement, thanks for this guide, however I would like to share my exp. I recommended to have extra pair of hands espesially when you pulling steering knuckle from axle shaft and definitely when you put it back on a shaft with new wheel bearing (we had to hammered knuckle and wheel hub back on the shaft, I think it was most difficult part of the whole job). Some shops (small once can only change wheel bearing if you separate wheel hub from steering knuckle you will need slide hammer 10-15 pounds one with attachment to do separation while that whole thing is still mounted on a car, or you can find bigger shop like I did and bring wheel hub and steering knuckle as one pc - Pepboys shop did it for me for \$45). ATTENTION: My ABS sensor came on shortly after (( here is the tricky part - ABS Brake Light On After Wheel Bearing Replacement
I will check my pick-up ring for any damages, also I will check ABS sensor it self for any debris, if no help I will take it to Auto zone to check code reading, but my intuition tells me that the guy who pressed new wheel bearing could put it backwards.... ( they didn't have guy who is usually does bearing job on site that day, so instead of 30 minutes job they said it will take, took them 2 hours.... who knows if that other guy knew how to install it right....) Will update on results!!
Thank you, sr for the long post, just want to warn guys who will DIY to know about it. Good luck!!

Last edited by Kopcap; 03-22-2015 at 01:09 AM.
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