 I'm at it again..., brake cal not releasing... Ideas? |
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| Chogokin |
  Nov 18 2006, 02:41 PM
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#1
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Member  Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878  |
Hey all, after about a 3 month break, I'm working on my little car again. I am back into the brakes to find out WTF is going on. I'll spare you all the grizley details getting to this point and just tell the problem. I have had problems with my pass side front cal on my '70 since I got it, put a kit into it about 8 months ago and still not fixed. Today I tore it down for the 3rd time to see if I missed something and have noticed that the cal applies pressure fine but does not release it, even when I release the hyd pressure. All the others release fine just not this one. Any ideas on what it could be?
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| bd1308 |
Nov 18 2006, 02:50 PM
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#2
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
id take it down and rebuild everything and check the condition of that rubber seal in the brake piston bore.
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| Chogokin |
Nov 18 2006, 03:00 PM
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#3
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
I thought that may be the prob so I took it out and checked it thouroughly and the seals are good. Is it possible that the guide.. lock.. whatchamacallit in the center of the pistons are catching and not allowing the pistons to release?
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| Dr Evil |
Nov 18 2006, 03:14 PM
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#4
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region 
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How are you releasing hydraulic pressure?
This is a common feature of a brake line failure. After a while the rubber brake lines start to flake off in the inside. These flakes act like check valves and trap pressure on the caliper. If you disconnect the brake line and are abel to retract the piston then you pretty much have proof of your culprit. It is also possible that the deteriorating line could have let some flakes migrate into your caliper and are causing it to retain pressure in the caliper. Same as problem above, just further down the line. |
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| Chogokin |
Nov 18 2006, 03:50 PM
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#5
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
I bet your right, after a few tests I can release pressure with the bleed valve and the brakes releasing slightly. But when I loosen the line it released. So, new lines it is. Thanks for the help (IMG:style_emoticons/default/aktion035.gif)
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| Chogokin |
Nov 18 2006, 03:54 PM
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#6
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
Any recommendations on where to buy some new ones from or should I just hit ebay, I see steel braided ones for about $70
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| highways |
Nov 18 2006, 04:22 PM
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#7
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Senior Member Group: Members Posts: 613 Joined: 18-June 05 From: Los Angeles, CA Member No.: 4,296 |
Steel braided are nice, but I've heard they still have plastic on the inside. My steel lines being old as they are going to be replaced and I'm just going to go with new rubber to save some costs since I have alot of stuff to replace.
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| Eric_Shea |
Nov 18 2006, 04:25 PM
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#8
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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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| Chogokin |
Nov 18 2006, 05:13 PM
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#9
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
QUOTE(Eric_Shea @ Nov 18 2006, 04:25 PM)  who's got the rubber ones? I just took mine off and it is SHOT! need some QUICK! NM I found them on your link.. |
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| Dr Evil |
Nov 18 2006, 06:26 PM
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#10
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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Did you try taking the offendig part to the FLAPS to see if they have a replacement? I know NAPA tends to stock such things, but not my car type. You will be looking for that length wiht those metric (?) Euro ends.
Happy hunting! |
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