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Old 11-18-2021, 02:17 PM #1
jerseygeorge jerseygeorge is offline
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Angry Suggestion, rusted brake pins.

Friends- changing front pads and rotors only. On my rusty trusty 4Runner I can loosen all bolts, but can’t drive out the two pins. Any suggestion?

I have used hammer, heat, PB blaster.

Darn can’t insert picture 🤬🤬🤬. But the two pins holding brake pads in.
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Old 11-18-2021, 02:58 PM #2
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Big ass punch is how I did it. Too small and will just bend. once you get it partially thru to where you can get a wrench or breaker bar in front of the pin, you can then hammer on the bar to push the pin the rest of the way thru since a punch only has like 2" before the neck and gets stuck on the caliper.

Spray some more pb and grab a ride to go to Napa to get the brake pin caliper kit and give it a go when you get back.

Oem is like 7 a pin, Napa was like 7 for both sides.
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Old 11-18-2021, 05:12 PM #3
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Here are some pics.. Do I pound out from the back? Or try and grab with vice grips and pull out from the front? There are numerous videos on youtube changing front pads, and the pin always comes out so eas!




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Old 11-18-2021, 05:14 PM #4
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Quote:
Originally Posted by jerseygeorge View Post
Here are some pics.. Do I pound out from the back? Or try and grab with vice grips and pull out from the front? There are numerous videos on youtube changing front pads, and the pin always comes out so eas!

The round side in first Pic is the out, second Pic is the hitting side
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Old 11-18-2021, 07:42 PM #5
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They come out so easy because those videos aren't from NH! I absolutely lather mine in anti-seize before I put them in. Step 1 - get new pins. Step 2 - soak them in a good penetrating oil. Step 3 - get a punch about the same size as the pin. Get your hammer and pound those suckers out.

A couple times over the past 17 toyota trucks I have had I actually just bought new calipers because those suckers just wouldn't come out. I actually put new ones on mine 2 years ago (new raybestos ones, not remans because those are horrible) and one of these days I will rebuild the old ones. Which are likely fine as the truck had 50k when I changed them. One felt a little sticky at times so I just did them both.
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Old 11-18-2021, 10:04 PM #6
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Quote:
Originally Posted by 85GT-79FJ40 View Post
A couple times over the past 17 toyota trucks I have had I actually just bought new calipers because those suckers just wouldn't come out.
I would like to change out the Calipers. They are pretty rusty, and 9 years/ 140k miles old. But I have never changed calipers or bled brakes, so was hoping to get rid of the grinding sound from my brakes easily with pads and rotors.

JG
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Old 11-19-2021, 03:40 AM #7
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Have you tried grabbing the pin with some needle nose (locking if possible) and twisting it back n forth? The twisting motion should help break the rust away.
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Old 11-19-2021, 09:28 AM #8
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It doesn't look like you attempted to hit the opposite side with the head. If you tap it in, it will often loosen the pin. If you hit the opposite side of the pin too hard it will flare out and there will be no hope for removing it without cutting it. Like the previous post said also, try to grab it and twist it to loosen it. I make it a habit to grease the pins every rotation. They often seize and trash the brake pads.
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Old 11-19-2021, 11:39 PM #9
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These can be a real PITA. I’ve had to cut them when I lived up north, grind off the tips, and drill out the holes. I’m out of the salt belt now and I still grease them before assembly.

I made a set at one point out of stainless rod with stainless pins through the ends. My taco ran those for years without issue. Good approach if you can’t find the pins…they are just guides really.
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Old 12-13-2023, 05:54 PM #10
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Old Pin Left in Caliper Sent for Reman

Just within the past week, I ordered 2 remanufactured front calipers for my 3rd generation 4Runner (1998 model). They came from a nationally known, internet car parts company. They in turn had gotten them from a nationally known company that makes and sells aftermarket new and reman brake parts. Both companies shall remain nameless to protect the guilty.

When I got the calipers, I found the left front caliper still had the remains of the lower pin still in the body of the caliper. It looked to me as though the previous owner had just cut the pin and left that portion of the pin in place within the caliper. I then get the caliper, complete with rust protective coating, and of course the new pin wouldn't slide in. I was furious to say the least.

Nevertheless, I sent it back and awaiting a replacement as I type this. The company even had the nerve to ask me if my mechanic could repair the caliper. My answer was no, I paid for a ready to use part and that's what I wanted.

So everyone here in 4Runner Nation, if you are going to cut the pin, put a note with the caliper when you send it in so the reman company can at least be warned so they will (maybe) drill/ream out the old pin and make the part usable again.
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Old 12-13-2023, 08:19 PM #11
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Those pins should be part of yearly maintenance, especially in the rust belt.
When I install new pads and new, or cleaned pins, I always drill the pin holes in the pads one size up from the hole size, same on the caliper. You have a better chance getting them out in the future. I just cleaned 4 pins this afternoon getting them ready for the future.
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Old 12-13-2023, 08:48 PM #12
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For me, it was lube with lightweight oil, tap toward the front (with a brass hammer if you have one), lube, tap toward the back, and on and on. Use moderate taps, don't try to crush it all at once. Have to be patient. Even if no movement can be discerned at first, there is movement, and the oil will get in there. Every 20 hits or so, try twisting the head of the pin with good serrated-jaw pliers. When it gets to where you can turn the pin, keep applying oil and twist and pull and tap back and forth. I know a lot of folks use PB Blaster, but in my experience, lightweight oil or WD40 work better. Patience is your friend, though, so don't be in a hurry. You'll get it!
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