Bleeding Opposing Caliper Brakes

[thescreensavers]

So Im just wondering , my Service manual for the STI brembos say to bleed inside pistions first.

But that doesn't exactly make sense, if you bleed the outter its pulling through the cross over so its filling both sides, then when you bleed the inside you only need to do a short bleed.

 

[leper84]

Just a guess, I'd say its to prevent an air bubble getting trapped on the inner side of the caliper.

 

[thescreensavers]

Sure but then when you bled the inner side it would come out and thats all youd need to do.

 

[Railgun]

So don't listen to what the manual says then and best o luck. They say rtfm for a reason.

 

[Wuzup101]

Do the inner and then the outer. If you only do the outer, an air pocket can still form at the top of the inner location (which is why there are two bleeders). It takes an extra 5-10 minutes per wheel (if you are as slow as I am lol) so no big deal.

 

[cbrsurfr]

Wow I had no idea there is an inner and outer on Brembos. The manual for the Evo only specifies the caliper order. That being said I did a track day on them and had no issues. I will be doing both in the future. Glad I read this and then looked it up for my car.

I use a Motive power bleeder. Makes bleeding a piece of cake.

 

[Wuzup101]

Wow I had no idea there is an inner and outer on Brembos. The manual for the Evo only specifies the caliper order. That being said I did a track day on them and had no issues. I will be doing both in the future. Glad I read this and then looked it up for my car.

I use a Motive power bleeder. Makes bleeding a piece of cake.

The Evo X service manual specifies the opposite (you bleed outer first, then the inner). I imagine the cavity design is a bit different but same concept. Not sure what model Evo you have.

See page 16: http://www.evoscan.com/manuals/EvoX/10_GS41EVO_MMNA_SM/GR00003600-35A.pdf

Note that if you are just flushing new fluid through the system for a track day or preventative maintenance, the order that you do this isn't likely to matter (either is the order of what corner you do first).... but hey... it's no harder to do it in the right order. There is no reason to think that you should be introducing air into the system by just doing a quick flush so no bleeding is typically required. Just flush until the color changes (ideally you'll be able to see the color change lol).

Make sure you don't get any brake fluid on those calipers... it'll screw up any paint it touches. It's a good idea to wash the calipers after you are done just in case. I was pretty careful the last time I did mine and I still had issues (even with washing).

 

[JCH13]

So Im just wondering , my Service manual for the STI brembos say to bleed inside pistions first.

But that doesn't exactly make sense, if you bleed the outter its pulling through the cross over so its filling both sides, then when you bleed the inside you only need to do a short bleed.

If crap from the line is coming through and you are bleeding the outside pistons then it will have a chance of settling out in the inside piston as the fluid flows through. If you bleed the inside pistons first a larger portion of said crap will flow out with the bleeding fluid.

Just a guess different from the more likely situation that it'd trap an air bubble.

 

[cbrsurfr]

Make sure you don't get any brake fluid on those calipers... it'll screw up any paint it touches. It's a good idea to wash the calipers after you are done just in case. I was pretty careful the last time I did mine and I still had issues (even with washing).

The heat from 1 track day (with track pads) turned my Brembos to "Brownbos" anyway. IE red calipers turn orangish and the white Brembo logo turns brown. If I ever have to have them rebuilt I think I'll have them re-done in black.

 

[Wuzup101]

The heat from 1 track day (with track pads) turned my Brembos to "Brownbos" anyway. IE red calipers turn orangish and the white Brembo logo turns brown. If I ever have to have them rebuilt I think I'll have them re-done in black.

Yes mine are brownbos too lol... I'm very familiar! I think mine will be powder coated if/when I rebuild them. That was more for the OP.