06-01-2021, 04:01 PM | #1 |
Private
85
Rep 62
Posts |
AP Racing Calipers Spreader Tool
Hi All
Basic question to anyone running with the AP Racing calipers at least up front on their M2 (or other F87) - what do you happen to use for pushing the pistons back in while changing pads? The front 6-piston calipers to me feel quite tough to push back in even with the master cylinder cap removed. It is of course mostly felt when swapping between pads with dramatic differences in material remaining. To date I've been using a completely used pad as a wedge to push them back in, but since I can't contact all the pistons at once that can lead to others coming back out. Any suggestions/links to preferred tools for these calipers? |
06-01-2021, 04:40 PM | #2 |
Colonel
2262
Rep 2,514
Posts |
Bought this for my 9660 kit. Works decent enough. Lang Tools 279-5420 279 Brake Caliper Press https://www.amazon.com/dp/B0079GQKDE..._1NY5RcPzJHDPs
__________________
?16 M2 Long Beach Blue/Black, 6MT
'22 X5 4.0 M Sport Black Sapphire/Tartufo ?22 Tesla Model Y Performance Midnight Silver/White |
Appreciate
0
|
06-01-2021, 06:37 PM | #3 |
Colonel
2080
Rep 2,999
Posts |
After years looking for a quality tool, I found this Lisle-29100-Quick-Quad-Spreader
Last edited by omasou; 06-01-2021 at 06:45 PM.. |
06-06-2021, 05:30 PM | #5 |
Private
40
Rep 95
Posts |
Not as fancy as the quick spreaders but bought this a decade a go and still use it. Couldn't have cost me more than $10 at the time.
__________________
Current: 2020 X3M, 2022 911 GT3
Past: 2020 M2 Competition,2018 X3 M40i,2017 X3,2016 VW ,Golf R,2015 BMW M3,2010 VW GTI,2008 911 GT3,2005 VW GTI,2002 VW GTI 337 |
Appreciate
0
|
06-08-2021, 05:26 PM | #7 |
Banned
844
Rep 1,962
Posts |
A big screwdriver seems to work okay. Obvs, if you're in the middle of an Endurance Race pit stop and need to change the pads - hot - in a matter of seconds, there are better tools.
|
Appreciate
1
chief1richard381.00 |
06-09-2021, 08:26 AM | #8 |
Life is on the Track, the rest is just waiting.
381
Rep 731
Posts |
The big expensive, clumsy Lisle Tool doesn't work on "Stock" M2 rear calipers. Better off using a Flat Head screw driver as posted. Just keep pads being changed in caliper and spread apart with screw driver.
__________________
At a Point above 7,000 RPM.
|
Appreciate
0
|
06-14-2021, 07:27 AM | #9 |
Private
38
Rep 65
Posts
Drives: 2017 340ix M Perf, 2019 M2 Cmp
Join Date: May 2017
Location: Canada
|
Girodisc
I've been using the Girodisc piston spreader. It can pull six piston quick and easy.
https://www.girodisc.com/Caliper-Pis...ol_p_5970.html Of note you have to keep the inside pad in the front while spreading as the caliper hanger is in the way of the inside piston (unless you choose to disassemble the hanger from the caliper). Works for any kind of piston configuration. Some may say it's expensive but time is money
__________________
Dan
|
Appreciate
0
|
07-07-2021, 10:34 AM | #10 |
BimmerPost Supporting Vendor
1019
Rep 839
Posts |
We don't have a preferred tool for spreading the pistons. The one thing you do want to make sure of however, is to 1) clean the sides of the pistons before pushing them back into the caliper. Debris on the sides of the pistons can cut your internal piston seals. 2) cover the pistons with a rag before pushing them in. You don't want anything hard directly contacting the pistons. If you nick the pistons, create a burr, etc., it can also damage the internal seals when you push the piston back into the caliper.
|
Appreciate
1
mcvaughan702.00 |
07-07-2021, 12:18 PM | #11 |
Banned
844
Rep 1,962
Posts |
OP, the other thing that will help is if you crack the bleed nipple open - ideally with a brake bleed kit attached so the fluid doesn't drip everywhere. Once you've pushed the pads back, close the nipple again, and remember to pump the pedal and check the reservoir/top up before driving.
|
Appreciate
0
|
07-07-2021, 01:55 PM | #12 | |
New Member
19
Rep 17
Posts |
Quote:
How would you access the pistons to clean them before spreading the pads? And what would you clean the pistons with? I use a Lisle spreader against the edges of the pad backing plates to push in the pistons. Thanks! Alex |
|
Appreciate
1
M Fifty844.00 |
07-07-2021, 05:01 PM | #13 | ||
Brigadier General
3968
Rep 3,390
Posts |
Quote:
__________________
Not a Doctor, those are just my initials.
|
||
Appreciate
0
|
07-08-2021, 10:41 AM | #14 |
New Member
19
Rep 17
Posts |
|
Appreciate
0
|
07-08-2021, 11:20 AM | #15 |
Brigadier General
3968
Rep 3,390
Posts |
I push mine out no problem. Use my fingers to pull on the pad slightly (less than a mm is needed to get them wiggling). Alternatively use a flat head on the backing plate and tap it with a hammer. Again it'll slide right out.
__________________
Not a Doctor, those are just my initials.
|
Appreciate
0
|
07-29-2021, 12:56 PM | #16 |
BimmerPost Supporting Vendor
1019
Rep 839
Posts |
|
Appreciate
0
|
07-29-2021, 01:17 PM | #17 | |
Banned
844
Rep 1,962
Posts |
Quote:
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|