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Disk brakes & do it yourself

Old 05-14-2013, 02:00 PM
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Default Disk brakes & do it yourself

Thinking of doing the front brakes on my 08 Ranger myself, do auto parts stores like NAPA still check & turn rotors or do you have to buy new ones? If I have to buy new rotors do they press in the races or is that something I will have to do myself? Thanks, PF.
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Old 05-14-2013, 02:33 PM
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most trucks and cars these days have sealed bearing hubs so you dont have to replace the bearings, just remove the caliper, caliper bracket, knock the rotor off and install everything back. Most NAPAs still might do cut rotors but its getting hard to find places that do it. Sometimes its better off to get new rotors cause it might be $7 to cut them or $20 for a brand new rotor.
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Old 05-14-2013, 04:09 PM
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I think you can only cut rotors 20thoundths, then they are out of specs.Get new ones for the little diff. in costs.Rotor's don't have bearings in them.They just slide on the hub.The bearings are in the hub
Unbolt the caliper then unbolt the brkt and slide the rotor off the hub
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Old 05-14-2013, 04:11 PM
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On most vehicles a brake job is surprisingly easy. Don't bother with turning them, just start price shopping now for parts and plan on new rotors. There are some great suppliers online, including amazon.

The money you save doing the job yourself will easily justify the new rotors.
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Old 05-14-2013, 06:15 PM
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Originally Posted by Thalasso View Post
I think you can only cut rotors 20thoundths, then they are out of specs.Get new ones for the little diff. in costs.Rotor's don't have bearings in them.They just slide on the hub.The bearings are in the hub
Unbolt the caliper then unbolt the brkt and slide the rotor off the hub
It's 2wd, hub & rotor are one piece
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Old 05-14-2013, 06:19 PM
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I use an on-car brake lathe at work- no need to remove that rotor unless repacking bearing- but that machine costs $9,500.... if you buy new rotors, the bearings will come with new races. You would have to remove the old ones and press in the new ones. The rotors CAN be cut off the car, but if you are removing the bearings you should inspect the bearings and races for wear and make your decision on the fly.
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Old 05-14-2013, 06:20 PM
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Still wouldn't worry about it.

Just replace the pads (Loosen one bolt, take out the other, pull caliper back, take out pads, push piston in, install new pads, etc.) and slap back together.

Forget turning/replacing the rotors, unless, of course, you have other issues like pulsing, pulling, etc.

If it ain't broke....
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Old 05-14-2013, 06:27 PM
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Originally Posted by Esuomm1 View Post
Still wouldn't worry about it.

Just replace the pads (Loosen one bolt, take out the other, pull caliper back, take out pads, push piston in, install new pads, etc.) and slap back together.

Forget turning/replacing the rotors, unless, of course, you have other issues like pulsing, pulling, etc.

If it ain't broke....
Pulsing.
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Old 05-14-2013, 06:35 PM
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pulsations are obviously caused by warped rotors, some can be turned but usually pulsations return as it is a result of expansion/contraction of the steel. Likewise, buying the cheapest rotors on the shelf is just as bad as you are rolling the dice the steel they used was dense enough to withstand the temps of hard braking. Get NAPA premium rotors and don't look back.
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Old 05-15-2013, 06:28 AM
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don't forget to grease the slides...the bolts that hold the caliper on and they slide on....if you don't, they won't work correctly.
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Old 05-15-2013, 06:33 AM
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Originally Posted by 1997MAKO231 View Post
pulsations are obviously caused by warped rotors, some can be turned but usually pulsations return as it is a result of expansion/contraction of the steel. Likewise, buying the cheapest rotors on the shelf is just as bad as you are rolling the dice the steel they used was dense enough to withstand the temps of hard braking. Get NAPA premium rotors and don't look back.
X2

If your pedal is pulsating, the rotors are warped. Don't waste money on cheap replacements. Been there done that, the cheap one's will warp out in no time. Spend the extra money and buy quality rotors and many miles down the road, you will be happy you did.
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Old 05-15-2013, 07:17 AM
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:
Originally Posted by NCcarguy View Post
don't forget to grease the slides...the bolts that hold the caliper on and they slide on....if you don't, they won't work correctly.
X2This is one of the most important things to do the must slide freely or only one pad dose the work!
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Old 05-15-2013, 07:52 AM
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Originally Posted by PF-88 View Post
It's 2wd, hub & rotor are one piece
$100.00 +-. I think i would get them turned.At least this time. Nothing wrong with it. Just don't hit the brakes hard until the pads are mated to the surface. Grease the slides with caliper grease only. Not with just any grease.
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Old 05-15-2013, 03:13 PM
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Thanks for all the info, I'll go with the napa rotors, pads, seals, & caliper grease and be done with it.
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Old 05-15-2013, 04:49 PM
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Use a torque wrench when putting your wheels back on and you'll lessen the chances of warped rotors down the road.
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Old 05-15-2013, 05:08 PM
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Well, let me be the first to spill his guts about how he's done everything bass-ackwards for over 40 years....the result of no childhood training, followed by need to be frugal, ending with "...if it's gone OK so far, why change anything?".

here's what I've learned:

a. drum brakes are crap; glad they aren't around anymore,

b. rotors that are held on with allen screws are nasty when old. Buy Kroil for that stuff.

c. don't wait until the pads are worn out, because hard braking with fully-extended caliper pistons can cause them to break.

d. I just did the Jag XJ8 and didn't grease bolts...never have greased bolts...maybe I'm lucky, or maybe changing rotors/pads every 30K eliminates that concern.

e. buying ceramic and other high-teck pads is dumb...at least to me. Why buy things that sound cool, but are made for ultra-high-temp use at tracks when what we do is just drive normally?

f. breaking in brakes is easy; an old Porsche trick. Find a long road...get to 60 and brake down to 10, then repeat the drill 6 times or so. Never let the car come to a stop, and drive 5 minutes before you stop. Brakes are bedded...
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Old 05-15-2013, 06:57 PM
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Question. Do you always have to turn the rotors? I mean if there's no wear or major grooves or anything plus no rotor warp what does it hurt just to replace pads? On the last 4 front disc brake pad replacement I haven't turned the rotors for the above reasons. I haven't noticed any difference in braking or noticeable pad wear. Did my corolla approx 60K miles ago and it's time to do them again. Tundra is also getting a bit low on pads as well. ??
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Old 05-15-2013, 07:28 PM
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Grease the slides with caliper grease only.

I know using the wax found in a crayola crayon (green) for the past 35 - 40 years is a little more work to apply than caliper grease, but I've never had an issue with binding! The wax in crayons does not attract nor hold road grim or brake dust, any and all grease will!
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Old 05-15-2013, 07:29 PM
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Originally Posted by round2it View Post
Question. Do you always have to turn the rotors? I mean if there's no wear or major grooves or anything plus no rotor warp what does it hurt just to replace pads? On the last 4 front disc brake pad replacement I haven't turned the rotors for the above reasons. I haven't noticed any difference in braking or noticeable pad wear. Did my corolla approx 60K miles ago and it's time to do them again. Tundra is also getting a bit low on pads as well. ??
If the rotors look good, I leave them alone.
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Old 05-15-2013, 07:30 PM
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Thanks OP. Sounds like a plan.
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