Lexus143

I was changing the brake pads on a 2015 rx350 F sport with 40k Miles. When I slid the calipers off. I found 3 torn piston dust boots. I dont want to leave as is. Can anyone confirm if these dust boots can be pryed of and replaced?

Felix

Dust boots meaning the slide pin boots? A local auto parts should have those....

Lexus143

Not the slide pin dust boots. It's the dust boot around the piston in on the caliper. I've seen some for sale online under "caliper seal kits". I was just wondering if anyone had replaced them by simply prying them out and popping them back in. I didnt want to pull or rip the remaining boot and not be able to pop the new one in.

Clutchless

If you can find a caliper piston boot seal kit, they can be replaced. Youtube should have videos for Toyotas which will be the same as the RX. Good luck.

Push the piston all the way in and use a small plastic pry tool to pry out the dust seal. No fluid will escape so you won’t have to bleed the system. Blow out any crud and replace the seal.


Or just replace the caliper, but then you have to bleed the system.

Felix

Only 40k & the piston dust boots are shot? Wow.....I'd say warranty, but your possibly out thanx to the year.

Lexus143

I was surprised to see them torn. When I took them off I saw it was snagged on the pistons edge. These dust boots are pretty baggy and dont coil back in place when the pistons are pushed back down.

Lexus143

Are these dust boots fairly easy to pry out and pop in?

Felix

I'd hitup a auto parts store.....your looking for a 19B3352/53 or a 19B6274/75 depending on where it was assembled at....The only difference I found was the 6274/75 calipers had 44mm pistons vs 45mm pistons....How do IK, cause I replaced mine last month as well as upgraded the oem brake hoses w/ SS ones from tirerack as well as flush the fluid......

salimshah

Something is not right and it it can be an outcome of the rip too.

Unlike other boots the, piston boots are more like seals than bellows. The expand and contract on each brake application, but as the pads wear out they let the piston slowly extend out while keeping the outside stuff from moving in.

When I do pad replacement, I do minimum push back of the pads to free the calipers and then swing them out and then clean the piston-boot edge and then push the pistons back in. This prevents contaminant and minute stuck on particles from getting behind the boot.

Personally I have only seen the boots rip when some one is not careful in reattaching the calipers [they nick the boots by the rotor edge] or just careless mechanics when they stick the flathead screwdriver. Assembly problems can happen too, but I have never come across one from the factory.

Salim

m1964

I had to replace both front calipers due to damaged boots. In my 2012, original rotors were full of rust on the insides and it looked like the rotors were "throwing" the rust out. Both boots in each caliper had accurate thin "split" on the surface facing inside towards the rotor.
One of the pistons was shut so I replaced both calipers, but the aftermarker calipers rust unlike OEM.

Felix

Should of been zinc coated.......Curios to hear (read) what the OP ended up doing.......