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Old 03-11-2014, 08:19 AM #16
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Quote:
Originally Posted by unlimitedFJ4 View Post
anyone else have this issue lately?
Just replaced both my front calipers yesterday after work (they were NAPA remans so the new parts were 'free' under warranty). The best solution short of a big brake kit from Stoptech is to just replace the calipers with re-mans that have a lifetime warranty. If they fail again, just replace and you're out the couple hours it takes to swap them and flush fluid.

Good time to flush the brake fluid too as someone further up the thread suggested.
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Old 03-11-2014, 09:58 AM #17
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Yup, just did my front left caliper. It was also a NAPA reman, replaced under warranty for the third year in a row. It seems I have to replace this caliper yearly.
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Old 03-12-2014, 12:26 AM #18
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Just replaced another rear caliper a few weeks ago. That makes 5 total calipers in over 160k (once per, with the passenger rear repeat).

I did the rebuild once, got the T-shirt, don't care to do it again.

This last one was frozed up (sorry, couldn't resist!) and I removed it, soaked it with PB Blaster inside, rinsed several times with brake fluid, reinstalled and it was shortly the same drag, so replaced it.

Advance Auto has the rears, about $70 with about $70 core (return the old one for credit) WITH the bracket. Drop dead simple choice.

IIRC, I ordered the fronts from autopartswarehouse com for about $90/ea a couple of years back. The slide pins were MUCH, MUCH better than the originals. They have never rusted to a larger diameter like the originals.

Use never sieze in the right places, changes are very easy.

I use an empty coffee can an let the brake fluid drip into it while changing calipers. Make sure your reservoir is filled, cap off but sitting on top to reduce chances of contamination by moisture or debris.

I open the bleeders and then tighten, then loosen again BEFORE installing. Sometimes the threads are a bit tight and this helps break things in and seat in correctly where you can actually get at it ;)

Push the caliper piston all the way into the caliper to avoid getting air trapped in the piston.

I then fill the caliper with brake fluid, let it sit a few mins, dump it out, refill, then install.

Once you've installed the brake line, I leave the bleeder cracked open and let some fluid run out before tightening the bleeder. It REALLY speeds up the brake bleeding process.

Note that it is important to clean up all the brake fluid as it RUSTS EVERYTHING!

Don't forget to top off the reservoir with brake fluid (Fill line) and put the cap back on.

Tips:

1. Be sure you don't forget the crush washers on the banjo bolt (bolt of the brake line with the hole through the center).

2. Make sure the flat part of the brake line bracket lines up with the one on the caliper and is facing away from the rotor

3. Be careful not to pinch, kink, or otherwise damage the brake line. If changing just the brakes (not the caliper), I use a piece of wire to tie the caliper to the coil to keep its weight off the brake line.

IMHO, it seems that the rear pistons have a high fail rate if you let the brake pad get down too far. It appears the piston comes out and then wants to kink (maybe?) and stick.

For $70, it's a no-brainer to replace as necessary, IMHO.

I tow often, we have rough, windy, and hilly roads, we offroad as we feel like it, we get lots of snow/salt/junk on the roads. We often have to drive through a foot of snow for days or weeks at a time. I think I get my $$ worth.

Hope this helps!
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Old 06-20-2015, 10:35 AM #19
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I just replaced mine again at 128k, last time was at 60k.

Napa reman calipers are $60 less core, it's worth replacing.
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Old 11-05-2016, 12:51 PM #20
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bought my 4th gen with 129k on the clock. Replaced drivers side front caliper. Now 3 years later it is time to replace the passenger side caliper.

This sucks. Rather be working on my dirtbike.
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Old 04-23-2018, 09:46 AM #21
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Replaced my second caliper due to "FROZED UP" and I am at about 175,000 miles. Interestingly enough when I bought the new caliper from O'Reilly's they gave me the wrong caliper. They sold me the 13WH caliper as my 4Runner came factory with 17" wheels and their site said it as the correct caliper. I came home and installed it only to realize it is not the same caliper on my 4Runner. My caliper is a 13WL and O'Reilly's doesn't sell that caliper, they sell a 13WG. After some research on the net it appears the 13WL and 13WG fit the same. All buttoned up now and brakes working well again.

BTW both times I had a frozen caliper the pads were very worn. I am wondering if heavily worn pads can lead to the frozen caliper due to them being pushed out all the way and leading to more corrosion.
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Old 04-23-2018, 10:39 AM #22
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Quote:
Originally Posted by a4passata6 View Post

BTW both times I had a frozen caliper the pads were very worn. I am wondering if heavily worn pads can lead to the frozen caliper due to them being pushed out all the way and leading to more corrosion.
A few years ago I was replacing pads at 50% for a few changes thinking this was the problem, but sure enough they just Frozed UP again like clockwork. I even did fluid changes more frequently which didn’t help either.


I’m on set #5 in the last 8 years. Funny thing is my rears are still original.

Being in the rust belt we just have to suck it up.
I keep a spare set ready to go now. At least the prices on the rebuilt units have come down a lot over the years.
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Old 05-23-2018, 01:18 PM #23
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So I was going to replace my pads on the weekend, pulled the driver's side tire off, took the pins out (had quite a bit of trouble taking the bottom one out), pushed the outer pistons in, and then found out that both of the inner pistons are seized. A bit of swearing later, I put the driver's side back together with the old pads in and moved to the passenger's side (to check the caliper) only to find out that both inner pistons are seized as well. Some more swearing and I went online to search for options, which brought me to this thread.

The funny thing is that all four pads are worn out perfectly even to the extent that all four are pretty much identical in thickness. I thought that was quite amazing.

Does anyone have any recommendations for the brand of calipers to buy? Does anyone have a "long-enough" experience with Raybestos Opti-Cal?

Ideally, I would want to put something on that I will never have to think about again, even if it means paying significantly more (within reason, of course). On the other hand, it's a 2008 4Runner with just over 200,000 km (125,000 mi)...

Any thoughts and suggestions will be greatly appreciated.
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Old 05-23-2018, 04:49 PM #24
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I went to 5th gen calipers and rotors which are a direct fit to those with 17inch or bigger wheels.
you do get a bit more bite and the pistons in the calipers are slightly larger. I weny through 3 sets including the original 4th gen calipers before making the switch.. and the 5th gen calipers lasted the longest.

That said im about to change out the 5th gen calipers again for a new set due to a lazy piston. Rust belt and offroading kill these calipers.
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Old 05-23-2018, 05:36 PM #25
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Thanks for the response. Good info. I had no idea the fifth generation calipers would fit. Yes, my wheels are 17 inches.

It is just hard to believe that there is no "permanent" solution to this problem. The pads I was trying to replace were installed about 125,000 km ago and I am sure they will still last till winter at least (I will replace them when I choose the calipers though). The rotors were installed at the same time and they are still great and I will not be touching them. There are have to be calipers that last at least twice as long

If anyone else has more experience with brands and whatnot to contribute, please do so. I am sure I am not the only one who will greatly appreciate it.
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Old 05-24-2018, 09:33 AM #26
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Quote:
Originally Posted by fihnguy View Post
Thanks for the response. Good info. I had no idea the fifth generation calipers would fit. Yes, my wheels are 17 inches.

It is just hard to believe that there is no "permanent" solution to this problem. The pads I was trying to replace were installed about 125,000 km ago and I am sure they will still last till winter at least (I will replace them when I choose the calipers though). The rotors were installed at the same time and they are still great and I will not be touching them. There are have to be calipers that last at least twice as long

If anyone else has more experience with brands and whatnot to contribute, please do so. I am sure I am not the only one who will greatly appreciate it.
I would say in general.. the 5th gen calipers do last twice as long or longer. Also the 4th gen pads are the same part number.. so its a direct swap.. You will need to change the rotors to 5th gen rotors which are also slightly thicker and less prone to warping.
If you want to sound fancy, its also the exact same part number as the lexus GX470/GX460 brakes. I think up until 2017. They may have changed them for this year but im not even sure thats the case.
You can cross check at www.rockauto.com
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Old 05-24-2018, 02:08 PM #27
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Thanks for mentioning the rotors. I will give it a consideration for sure.

Cheers!
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Old 05-31-2018, 12:58 AM #28
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Quote:
Originally Posted by Billynath1988 View Post
I would say in general.. the 5th gen calipers do last twice as long or longer. Also the 4th gen pads are the same part number.. so its a direct swap.. You will need to change the rotors to 5th gen rotors which are also slightly thicker and less prone to warping.
If you want to sound fancy, its also the exact same part number as the lexus GX470/GX460 brakes. I think up until 2017. They may have changed them for this year but im not even sure thats the case.
You can cross check at www.rockauto.com
Hi, I'm just jumping in on this conversation as i have just been advised I need new calipers on my 2003. It sure sounds like putting in 4th gen calipers is maybe not the way to go and that going with the 5th gen design is better. However, when I look at the calipers on rockauto and/or amazon for a 2003 they look completely different than the ones for a 2010. In particular, 4 pistons instead of 2. Am I missing something or am I just 'out to lunch'? Thanks for any advice.
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Old 05-31-2018, 03:33 AM #29
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I went through this recently, replaced the fronts with NAPA remans. I didn’t see or replace any washers. Where do they go? Thanks.
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Old 05-31-2018, 09:13 AM #30
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Hi, I'm just jumping in on this conversation as i have just been advised I need new calipers on my 2003. It sure sounds like putting in 4th gen calipers is maybe not the way to go and that going with the 5th gen design is better. However, when I look at the calipers on rockauto and/or amazon for a 2003 they look completely different than the ones for a 2010. In particular, 4 pistons instead of 2. Am I missing something or am I just 'out to lunch'? Thanks for any advice.

front should be 4 caliper .. rear is 2. you must have 17 inch wheels otherwise there is some modification of the dustshield you have to do. there is a 5th gen caliper swap mega thread if you search a bit
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