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More rebuilding concerns, etc.
Posted by Paul from Palmyra, PA [Email] (more from Paul from Palmyra, PA) on Fri, 25 Jan 2019 12:00:15

In Reply to: Rust on inside is more of a concern than on outside, walt, Thu, 24 Jan 2019 17:07:40
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Thanks for the insight about inside rust. I've often wondered about the rebuilt calipers and wear items like the piston you mentioned and also the slides. I have seen posts here about worn slides so how do you know if the slides on a rebuilt caliper are within specifications?

I also recall getting rebuilt calipers from a SAAB dealer back in the 90s and one of them leaked right away. Of course they replaced it, but I had to do the job twice.

As for outside rust being mostly cosmetic, you are right except sometimes the rust eats in the area where the dust boot on the piston seats and makes it hard to get a seal resulting in water and salt getting into the piston area. And the caliper in your picture, although rusted inside, is nothing like the rust I see on my calipers on the outside.

Maybe I'm too particular, but my old wheels look great when I clean them, but those ugly heavily-rusted calipers stand out all the more.

The salt being used on the roads seems worse than in the past. I've had two cars fail state inspection in recent years because the mechanic (SAAB authorized service) deemed the rotors to be too rusty to pass even though they had plenty of thickness and the braking area was shiny. The newer SAAB rotors seem to have a zinc coating on them that hold up better than some of the name-brand uncoated rotors so I use them exclusively.

posted by 73.175.99...

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