Forgot to post this but here are pads, one on left appears if tho the very right side was not contacting rotor. Perhaps the caliper is disengaging a only on one side?
Ah Ive heard of this method when checking for bad caliper. So i pull off caliper and then compress the piston with a c clamp like I did today to install? But with bleeder open. Why do this method rather than normal bleeding where I just hit brakes? Is this in a way bleeding from different direction?
I've heard of cases where the brake hose attached to the caliper deteriorates internally to the point where it blocks the release of hydraulic pressure at the caliper. If you're going to replace calipers, you may want to think about new hoses, especially if they look like they're original.
No, this is a brake bleeding method. It is called piston bleeding. And the normal bleeding usually does not remove heavier crud collecting at the bottom of the calliper, right behind the piston. The normal bleeding has the nipple at the top because air bubbles naturally rise to the top and bleeding is only supposed to get rid of air bubbles.
But there is crud and that affects braking. Get rid of the crud and its all better even for normal braking.
And you don't need a G clamp. Just open the bleeder and squeeze a flat head screwdriver in and squeeze the piston in. Stuff will spurt out the nipple. Then Press the brake pedal in all the way (making sure you have oil at the fluid reservoir - maybe fix up a bottle on top of it with extra brake fluid, with something sealing it against the mouth of the reservoir). New brake fluid will move out and force the calliper out again. Go squeeze it in again with the bleeder open. Do this 2 times after you see clear fluid run out - to see this more easily put transparent tubing over the open bleeder nipple fed into a clear bottle.
If you're lucky, any debris that is causing any blockages in your brake lines will be removed this way.
If you see a lot of debris coming out, and if this method fixes your problem, strongly recommend you proceed to do this with all your wheels. If it doesn't and you're stuck with rebuilding or installing another calliper, you will need to rebleed later and then you can do it for all the wheels instead of now.
This process is of course time consuming if you are doing it all by yourself. If you have someone helping you press the brake pedal on your command, you will only need and extra 5 minutes per wheel.
The extra brake fluid used up is well worth it.
- - - Updated - - -
If you replace the brake hoses, do that with all the wheels, and use stainless steel lines instead of stock rubber hoses. Stock are good but are about the same price as stainless steel ones or only slightly more expensive.
If you do this only buy from reputed companies like ecs tuning etc. Don't buy generic ebay stuff.
Last edited by alang1990; 11-01-2018 at 02:20 AM.
Ahh thank you so much for the instructions! Bleeding brakes is one thing I’ve never done and have always been intimidated by it! I suppose I’ll give this shot, either way I’ll need to bleed!
Well in process of replacing caliper. To start my brake pad that was always being applied literally broke in half. I guess thats from the overheating. So i went out and got pads. And turns out my new rebuilt caliper is too f***in small. Great. Now I need to leave car in air and return these. Also when I tried cracking bleeder on old caliper it broke right off! And no fluid came out. I disconnected brake line and fluid did come out so like isn’t clogged but that bleeder must’ve been.
By design, unless you unseat the taper for the bleeder, it will not release fluid, even if you break it off.
-Alex
Is there a certain brand you guys have had luck with in terms of reman calipers? This is the second time Ive purchased something specific for my e34 from oreillys and it doesn’t fit! Never again. Jeez who the f*** designs their parts. First an axle that the bolts wouldn’t even line up, now a caliper.
depending on your car, you may want to look into 540i brakes and do an oem upgrade. check rock auto or look for 540i brakes. My calipers were in need of replacement, i scored rotors and calipers off of a 540i for 200 bux, they were new rotors and i had to rebuild the 540 calipers but i did and now i enjoy the upgraded stopping power on my 535. It definitely was an improvement over my oe brakes. edit - also you may want to consider replacing the brake lines as over time they will start to swell and internally degrade.
Last edited by Neel; 11-07-2018 at 06:59 PM.
Herr, wirf Hirn vom Himmel! ... oder Steine, Hauptsache er trifft.
88 Alpineweiss / black E30 M3 -Project.
Brilliantrot / black US SPEC 3/90 prod e34 M30b35 535i 5spd - Modded.
98.5 Tiag Silber /black e36 m3 - Modded.
99.5 Estoril Blau /dove e36 m3 - Modded.
07 Crimsonrot /black E83 X3 6spd - Stock..
For even brake performance calipers should really be replaced in pairs. One company's rebuild is not the same as another's.
demet
I disagree.
While quality may vary the construction of the caliper remains the same. If it is working it will do the same thing, applying the same force.
An older properly functioning caliper is just as good as new or re-man one.
If the opposing older caliper has sticky hardware braking can be uneven so the slides need to be free on both ends of the axle. I think this is the problem some have experienced and wrongly attributed it to a faulty caliper or the need for matched pairs.
Calipers work, no leaks and able to move freely, or they don't.
Some also replace a perfectly good headlight when the other side burns out.
Last edited by ross1; 11-09-2018 at 06:58 AM.
If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue
Not if they had to use an oversized piston in the rebuild.
demet
That's a valid point if it were done but my understanding is that sleeving the bores is the industry norm to repair a badly corroded one. Given the abundance of most cores I doubt this is even done very often.
If a particular re-man does have a larger bore what is to say the next one on the shelf will too?
If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue
It would be unacceptable to all but the most unscrupulous remanufacturers - which, unfortunately, are out there - to change piston diameter on a brake caliper, precisely because that'll upset brake balance in a way that's difficult to rectify. It's like buying a 15" wheel that comes with "oh, by the way, we had to machine it down because of curb rash, it's a 14 now."
Last edited by ross1; 11-09-2018 at 03:39 PM.
If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue
Im gonna go head and assume piston size stayed same. If I install and car is now diving to the left then maybe I’ll look into it. Caliper arrives tomorrow so if im not out of town picking up an e23 then I’ll finally get to replacing!
E23?
If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue
IMG_0503.jpg
For the love of Christ, this caliper has is too small too!?? Wtf!! This is 2 different brands now that are too small. You can just look at them and see how much wider the original one is. This one like the other will not fit around the pads. Nor will the new bracket fit around the rotor. Am I F***ing something up or what? This is a Centric rebuilt caliper from Rock auto. What brands do you guys use??? Because now here we are, with my e34 stuck on jackstands still.
Is it possible you have 540i/M5 front brakes? Post the part numbers on the rotors, the original calipers, and the remans.
I did not think of that! And part numbers are different! IMG_0507.jpg
Original is 60/28/302
Reman is 60/22/302
IMG_0510.jpg
So what is this telling me?
Edit: I now see that my calipers are in fact 540i! Welp that explains my issue here. Thats pretty cool though! Lol. But in terms of the new pads I bought, will those not fit now?! Or do pads remain the same?
Last edited by jmile46; 11-10-2018 at 08:56 PM.
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