gdong

I used this awhile ago on my caliper pins and just today I see reviews on amazon saying that they cause rubber boots to swell on some honda / subaru cars. Has anyone else used this on their vehicle?

justnspace

iTrader: (1)

if it has any petroleum product in it, it will eat the seals.


ask me about my stupid mistake with petroleum and the brake master cylinder seals....

gdong

It's supposed to be non-silicone, non-petroleum

justnspace

iTrader: (1)

I hope you didnt get any on any rubber boots.


you can test out this permatex stuff on some rubber. apply or leave some in a jar with a little Honda rubber.
report back your findings

gdong

I put it only on the pin, and put the pin through the rubber boot. I also put some on the back of the pad so it would contact the caliper.

I do notice the car pulling a bit to the right so it could be dragging. And I have a slight vibration at highway speeds, but I did bump into the curb so the wheel could be out of balance.

I'm going to take this apart and see. I'm worried now that the caliper seal is also going to swell. Brakes seem to work fine otherwise.

paperboy42190

iTrader: (7)

what happened?

justnspace

iTrader: (1)

my noob ass poured MTF into the brake master cylinder. fucking noob mistake!!!!!!!!!!!!
the petroleum in the MTF fucked up the master cylinder internal rubber seals. made them swell. had no brakes!

had to replace Master cylinder along with a brake line.
since then, about 3 years ago, ive learned how not to be a noob.

mzilvar

iTrader: (3)

I use Dow Corning 111

I think some others use sylglyde

The DC 111 can be used for a lot of other automotive parts as well though.

gdong

Yea, I've heard nothing but good things about sylglide. I had trouble sourcing it locally that's why I just picked up the permatex stuff. I'm going to go with sylglide once I take apart my brakes tonight.

gdong

My local napa didn't have sylglide, apparently it's only in the states.

I got kleen-flo eze slide, silicone based instead, from what I'm reading it should be ok.

http://www.kleenflo.com/eze-slide.html

gdong

Alright, just pulled the brakes apart and the pins weren't moving too freely. I used some brake cleaner in the pin's hole, cleaned them out, and they move much better with the eze slide. I serviced these last about 5 months ago with that permatex crap.

My question now is, do these piston seals look swollen? The boots do sort of look a little swollen but the pins still move freely, do they need to be replaced anyway?

mrsimeon

Your caliper piston boots look good.
I would apply the lube on the rubber around that piston.

Also in the caliper pins. Apply multiple times lube inside- Untill they slide in and out nicely.

gdong

Will do, thanks again!

gwiffer

iTrader: (7)

You don't want any grease on the outside of the caliper piston boot or slide pin boots; you only need a little bit on the slide pins and inside the boots.

mzilvar

iTrader: (3)

I picked up the DC 111 on amazon for like $16 shipped, also silicone based, for more than I'll ever really need. It's actually food grade which means I can use it on my diving gear too or anywhere else there's an o-ring that makes a seal.

Looks like a good time to do the brake fluid as well. Piston boots look good to me. I usually look to make sure its seated all of the way, when I did my first brake job on the TL I noticed the rear right caliper piston boot was slightly out of its groove and had deformed.

That boot is actually to keep moisture and dirt out, the seal on the piston is actually inside of the bore that the piston rides in. The boots are kind of a pain to replace to get it to sit back into its groove properly too, I've torn one or two when I rebuilt my calipers.

Adobeman

Arg....Permatex 24110 is what I used on the rear slides earlier this year. Guess I'll be checking that out this weekend. Time to rotate the tires anyway so I'll spend a bit more time on the ass end I guess.

gdong

I've read that before, but what about on the back of the pad? That would result in some getting on the piston and possibly the piston seal.


I've read good things about DC 111 as well, but up here in Canada it's very hard to source some of these products. Brake fluid I've done about 2 years ago, was planning on doing that next year at the 3 year mark. I've seen those caliper rebuild videos but I hope I don't need to deal with that

gdong

Please report back with your results

Adobeman

Everything was just fine. No issues with the pin boots or caliper piston seal. It took a small amount of pressure to get the pins sliding but then they were very smooth with no binding.

At this point I'm really starting to question if I even used it on the pins. I know I used on where the pad ears contact the calipers and in between the shims and pad backs. But since the pins were in good shape earlier this year I don't think I would have gone to the trouble of taking the boots off to lube them.