 Brake Pad Expanding Springs, same as 911? NLA?? |
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| 7TPorsh |
 Dec 27 2010, 05:13 PM
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7T Porsh  Group: Members Posts: 2,691 Joined: 27-March 06 From: Glendale Ca Member No.: 5,782 Region Association: Southern California 
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Just started driving the car a bit and noticed the front brakes are a little sticky and one side drags a little bit.
After taking a look I realized and remembered that one of these star clips broke before when I removed the calipers the first time. But it was on the side that wasn't dragging. Dragging side has a clip. I assume these are required to drive with? or uneven braking? Car is a 1970. Are these the same for a 911? AA shows part number 901 351 916 16. Are these used in the rear as well? Also says NLA but repros going for $8-$10 a piece...seems really high and I need four.  |
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| Eric_Shea |
Dec 27 2010, 07:49 PM
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PMB Performance Group: Admin Posts: 19,304 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains  |
With all due respect (and a bad drawing), I'd have to disagree on a couple of points and agree on others:
I believe it is the bore seal that pulls the piston back. The knockback mechanism is the self adjusting ratchetting device that also keeps the piston high in the bore and adjusts to the pad depth, but the seal pulls against this to bring the piston back. - The dust/water seal you mention is just that... a dust/water seal. It doesn't have the elasticity to pull a piston back into the bore. Agree - Runout helps knock the pad back for the most part. These keep everything tight. They keep the pads tight against the piston and it is important that the pins are not inhibiting this travel as well. A long time ago a member here had a pretty neat trick where he put his pins in a drill and used a ScotchBrite pad on them... whatever works, pins and springs should be in place to help keep your brakes functioning they way they're supposed to. The cavity needs to be clean as well. I'm guessing this car hasn't been driven and the pistons are gunked up though. Attached image(s) 
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Posts in this topic
7TPorsh Brake Pad Expanding Springs Dec 27 2010, 05:13 PM
dr914@autoatlanta.com Very necessary but will not cause dragging, the pi... Dec 27 2010, 05:19 PM ME733
Just started driving the car a bit and noticed th... Dec 27 2010, 06:33 PM Eric_Shea For your car, they're the same as a 66 911 or ... Dec 27 2010, 06:56 PM
rwilner
For your car, they're the same as a 66 911 or... Dec 28 2010, 05:13 PM Cap'n Krusty IMO, they have nothing to do with pushing back the... Dec 27 2010, 07:29 PM 7TPorsh Thanks for all this info. Drawing looks spot on an... Dec 28 2010, 12:12 PM underthetire The rebuild kits I got from pmb had new ones. I pr... Dec 28 2010, 12:24 PM 7TPorsh ok..at AA for the front tension spring:
1966 911 ... Dec 28 2010, 12:48 PM Eric_Shea
You don't need that plate if the pistons are... Dec 28 2010, 02:43 PM Eric_Shea No... those are A-Caliper springs. They're to... Dec 28 2010, 06:22 PM |
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