Need to rotate caliper pistons, Is there an easy way? |
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Need to rotate caliper pistons, Is there an easy way? |
blabla914 |
Jun 1 2015, 10:58 AM
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#1
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I like primer Group: Members Posts: 321 Joined: 1-March 04 From: Connecticut Member No.: 1,740 Region Association: None |
I put 911 brakes with M calipers on not long ago, but the brakes have never been what I know they should be. I have a strange pulling issue which seems intermittent and is much worse when wet.
I've tried new rotors and pads and made sure the system is bled. I was going over everything this weekend and found the step in the piston on one caliper does not match the orientation of the other. I'm surprised I haven't seen this before. I have the factory manual so I can figure out what they are supposed to look like. Before I go and take the caliper off and then push out the pistons I figured I'd ask if anyone has an easier way to spin the pistons. Thanks for your help, Kelly |
DavidSweden |
Jun 1 2015, 11:05 AM
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#2
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
I put 911 brakes with M calipers on not long ago, but the brakes have never been what I know they should be. I have a strange pulling issue which seems intermittent and is much worse when wet. I've tried new rotors and pads and made sure the system is bled. I was going over everything this weekend and found the step in the piston on one caliper does not match the orientation of the other. I'm surprised I haven't seen this before. I have the factory manual so I can figure out what they are supposed to look like. Before I go and take the caliper off and then push out the pistons I figured I'd ask if anyone has an easier way to spin the pistons. Thanks for your help, Kelly I have rotated them using a wrench with some plastic strips between the jaws and the piston. It was a type M caliper from a 911 |
worn |
Jun 1 2015, 01:44 PM
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#3
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can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
I put 911 brakes with M calipers on not long ago, but the brakes have never been what I know they should be. I have a strange pulling issue which seems intermittent and is much worse when wet. I've tried new rotors and pads and made sure the system is bled. I was going over everything this weekend and found the step in the piston on one caliper does not match the orientation of the other. I'm surprised I haven't seen this before. I have the factory manual so I can figure out what they are supposed to look like. Before I go and take the caliper off and then push out the pistons I figured I'd ask if anyone has an easier way to spin the pistons. Thanks for your help, Kelly Well. I had the same problem. So I put some cloth in the space and blew the pistons out after yanking the calipers. Dooohhh!!! Good luck. Mine wasn't full of brake fluid, just the lubricant that comes with the kit, so they were stiff. I had the idea of using a block of hardwood shaped to fit the tiny step. But for me it didn't work. |
914bub |
Jun 1 2015, 06:42 PM
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#4
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Member Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None |
I am not familiar with 911 calipers but assume they are made by Ate? If So there is a Volvo factory tool that is made to rotate rear caliper pistons. It does not rely on any special notches or anything else besides the hollow part in the inside of the piston. I hope that makes sense. If you could show me a picture of the caliper piston I could tell you if it would work in this application. The tool is made for 240 series Volvo's, (1975-1993).
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blabla914 |
Jun 2 2015, 04:49 AM
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#5
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I like primer Group: Members Posts: 321 Joined: 1-March 04 From: Connecticut Member No.: 1,740 Region Association: None |
I am not familiar with 911 calipers but assume they are made by Ate? If So there is a Volvo factory tool that is made to rotate rear caliper pistons. It does not rely on any special notches or anything else besides the hollow part in the inside of the piston. I hope that makes sense. If you could show me a picture of the caliper piston I could tell you if it would work in this application. The tool is made for 240 series Volvo's, (1975-1993). This is exactly why I come to these forums. Do you mean this? I know this is intended for rear calipers that have to twist to retract, but I think it could also work to just spin the pistons. Thanks for the tip! Kelly |
914Sixer |
Jun 2 2015, 06:31 AM
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#6
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Stock 911 caliper pistons are NOT hollow. Tool will not work for stock application. See classic treads on how to get 20 degrees on piston.
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GregAmy |
Jun 2 2015, 06:36 AM
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#7
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Advanced Member Group: Members Posts: 2,301 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
Lisle 28600 is the Devil's own tool. I cannot hate those things more than I do.
Look up Lisle 25000, truly worth its weight in gold. |
aircooledtechguy |
Jun 2 2015, 07:16 AM
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#8
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The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
Lisle 28600 is the Devil's own tool. I cannot hate those things more than I do. Look up Lisle 25000, truly worth its weight in gold. (IMG:style_emoticons/default/agree.gif) 110% However neither of these tools will do what the original poster wants because there are no notches to engage since our (early Porsche) calipers don't screw back in like a modern car's calipers. |
jcd914 |
Jun 2 2015, 09:27 AM
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#9
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
There is a factory tool to rotate the caliper pistons.
It is a pliers with small knurled half round ends that go inside the round edge of the piston (the part that has the step in it). When you squeeze they expand inside the edge of the piston and you can then push or pull to rotate the piston. Can all be done on the car, just pull the pads. These are probably the same as the Volvo tool or close. There should be pictures in the factory manual or maybe the 911 manual. Jim |
Eric_Shea |
Jun 2 2015, 09:37 AM
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#10
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
You will ruin your pistons if you don't simply remove them and put them back in the proper orientation.
You've already spent more time reading this and searching for tools that it would take to pop them out and put them back in properly. (IMG:style_emoticons/default/wink.gif) I doubt that's your problem with the pulling though. MythBusters: Do not use pliers or a wrench. That's how pistons get f'd up. The Vulva tool is for a different type caliper (modern screw in pistons) Later 911 M-Caliper pistons are hollow but, your's probably aren't You don't need a special tool to set the angle. E-out |
blabla914 |
Jun 2 2015, 10:22 AM
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#11
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I like primer Group: Members Posts: 321 Joined: 1-March 04 From: Connecticut Member No.: 1,740 Region Association: None |
You will ruin your pistons if you don't simply remove them and put them back in the proper orientation. You've already spent more time reading this and searching for tools that it would take to pop them out and put them back in properly. (IMG:style_emoticons/default/wink.gif) I doubt that's your problem with the pulling though. MythBusters: Do not use pliers or a wrench. That's how pistons get f'd up. The Vulva tool is for a different type caliper (modern screw in pistons) Later 911 M-Caliper pistons are hollow but, your's probably aren't You don't need a special tool to set the angle. E-out Well Eric that's what I figured, but I thought there was no harm in asking. yes you are correct, mine are not hollow. Though I think I probably spent less time on this than it will take to pull one caliper, pop pistons, re-assemble pistons, re-install caliper, and bleed. Don't you think? kelly |
blabla914 |
Jun 2 2015, 10:24 AM
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#12
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I like primer Group: Members Posts: 321 Joined: 1-March 04 From: Connecticut Member No.: 1,740 Region Association: None |
There is a factory tool to rotate the caliper pistons. It is a pliers with small knurled half round ends that go inside the round edge of the piston (the part that has the step in it). When you squeeze they expand inside the edge of the piston and you can then push or pull to rotate the piston. Can all be done on the car, just pull the pads. These are probably the same as the Volvo tool or close. There should be pictures in the factory manual or maybe the 911 manual. Jim Going to consult factory manual tomorrow. I don't remember that. Thanks for the tip. Kelly |
Eric_Shea |
Jun 2 2015, 10:39 AM
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#13
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
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914bub |
Jun 2 2015, 11:14 AM
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#14
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Member Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None |
The one i was talking About Is Not For Screw In Pistons. It Is Just Used To Rotate The Piston But If 911's Dont Have Hollow Pistons It wont Work For You. Sorry For The "caps",(stupid Phone).
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