Pass on the Raybestos. PTFE in a high heat environment? No thanks.
Caliper slide pin keeps getting stuck
- Thread starter Klutch9
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Are there rubber bushings ON the end of one of the slide pins, usually the lower one ? If so, these bushings are frequently the cause of sticky / seized slide pins. The rubber swells, and starts to bind in the bore. The bushings are to prevent rattling, so they are not absolutely needed. You can simply remove the bushing, or replace the pin with the regular pin. It will slide smoothly, but it might rattle. On one of my cars, the calipers did not rattle at all without the bushing, on another car it drove me crazy and I replaced the bushings.
And careful with the brake lube. I am now using a different brake lube again, one that is supposedly compatible with rubber brake components. The last one was Syl-glide, and the bushings were still swollen. Before that Perma-tex synthetic brake grease ... the purple stuff. I think their new formulation is silicone based, and orange ...
And careful with the brake lube. I am now using a different brake lube again, one that is supposedly compatible with rubber brake components. The last one was Syl-glide, and the bushings were still swollen. Before that Perma-tex synthetic brake grease ... the purple stuff. I think their new formulation is silicone based, and orange ...
Originally Posted by HangFire
It would be the Sedona, which is a mini van.
I saw Sedona but my mind read "Sonata" !
According to this parts diagram, the pin with the bushing goes in the TOP position:
https://www.kiapartsnow.com/resourc...B9B002640D7B4260750F23EE7DD3A86BEE8BAC34
It would be the Sedona, which is a mini van.
I saw Sedona but my mind read "Sonata" !
According to this parts diagram, the pin with the bushing goes in the TOP position:
https://www.kiapartsnow.com/resourc...B9B002640D7B4260750F23EE7DD3A86BEE8BAC34
Originally Posted by hallstevenson
Originally Posted by HangFire
It would be the Sedona, which is a mini van.
I saw Sedona but my mind read "Sonata" !
According to this parts diagram, the pin with the bushing goes in the TOP position:
https://www.kiapartsnow.com/resourc...B9B002640D7B4260750F23EE7DD3A86BEE8BAC34
I just watched a YouTube video showing brake service on the front of this vehicle, and the pin with the bushing was on the BOTTOM, aka the leading edge of the caliper. FWIW I removed the rubber bushings years ago because I've had problems with them seizing before. Did it in both our cars. There is some caliper rattle but nothing that bothers me too much. There's usually a noisy toddler or music playing so I don't hear it anyway
I will check and see where the pin currently is and compare it to this diagram.
Originally Posted by HangFire
It would be the Sedona, which is a mini van.
I saw Sedona but my mind read "Sonata" !
According to this parts diagram, the pin with the bushing goes in the TOP position:
https://www.kiapartsnow.com/resourc...B9B002640D7B4260750F23EE7DD3A86BEE8BAC34
I just watched a YouTube video showing brake service on the front of this vehicle, and the pin with the bushing was on the BOTTOM, aka the leading edge of the caliper. FWIW I removed the rubber bushings years ago because I've had problems with them seizing before. Did it in both our cars. There is some caliper rattle but nothing that bothers me too much. There's usually a noisy toddler or music playing so I don't hear it anyway
But as far as I can remember, the pin that had the bushing was actually on the bottom part of the caliper where the issue exists. Maybe that's why I'm having this issue.
Originally Posted by Klutch9
I just watched a YouTube video showing brake service on the front of this vehicle, and the pin with the bushing was on the BOTTOM, aka the leading edge of the caliper.
Someone that worked on it previously could have reversed them by accident. They could have been installed at the factory incorrectly. This happened with Honda Accord models in the '08 to '09 timeframe. It happens....
Originally Posted by Klutch9
FWIW I removed the rubber bushings years ago....
The bushings are there for a reason. Is it only for noise reduction ? Maybe.... Are there other reasons ? Maybe....
I just watched a YouTube video showing brake service on the front of this vehicle, and the pin with the bushing was on the BOTTOM, aka the leading edge of the caliper.
Someone that worked on it previously could have reversed them by accident. They could have been installed at the factory incorrectly. This happened with Honda Accord models in the '08 to '09 timeframe. It happens....
Originally Posted by Klutch9
FWIW I removed the rubber bushings years ago....
The bushings are there for a reason. Is it only for noise reduction ? Maybe.... Are there other reasons ? Maybe....
Any updates on this?
I just ordered the Mission Automotive silicone grease. I have a plan to go through all my brakes this Spring/Summer and redo the disc caliper pins with it, and the pads with PasteLub.
I just ordered the Mission Automotive silicone grease. I have a plan to go through all my brakes this Spring/Summer and redo the disc caliper pins with it, and the pads with PasteLub.
Originally Posted by HangFire
Pass on the Raybestos. PTFE in a high heat environment? No thanks.
PTFE because it's a high heat environment. Even if it melts (at 620F, higher temperature than the brake grease flash point) it is still the most slippery solid you could have in there. It might even do the job without the grease it's in, but the grease serves to help seal against water ingress, and keep the caliper seals in good shape.
PTFE is rated to 500F when it needs to retain structure but melts, not burns, hotter than that. If you exceed 500F, you don't just need a race-formulated grease, you also need to replace the caliper seals. You can get temperature strips to indicate temperature but these don't even go higher than 500F because calipers don't get anywhere near as hot as the rotors themselves, it's then a fail for the caliper:
https://discoveryparts.com/racing-b...per-temperature-strips-ap-19-03-000.html
Pass on the Raybestos. PTFE in a high heat environment? No thanks.
PTFE because it's a high heat environment. Even if it melts (at 620F, higher temperature than the brake grease flash point) it is still the most slippery solid you could have in there. It might even do the job without the grease it's in, but the grease serves to help seal against water ingress, and keep the caliper seals in good shape.
PTFE is rated to 500F when it needs to retain structure but melts, not burns, hotter than that. If you exceed 500F, you don't just need a race-formulated grease, you also need to replace the caliper seals. You can get temperature strips to indicate temperature but these don't even go higher than 500F because calipers don't get anywhere near as hot as the rotors themselves, it's then a fail for the caliper:
https://discoveryparts.com/racing-b...per-temperature-strips-ap-19-03-000.html
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