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Bwingate |
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#1
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Newbie ![]() Group: Members Posts: 19 Joined: 30-March 24 From: New York Member No.: 28,029 Region Association: North East States ![]() |
I have been fighting mushy brakes since I got my 914. They are better but not great. I suspect there is a lot more bleeding to do, including finding the proportioning valve to bleed.
The PO said that they had the master cylinder changed by a local "Porsche expert" I suspect it was replaced with the 17 mm master cylinder. Can I confirm with an external inspection whether it is a 17 mm or 19 mm MC? So my plan is: 1) Bleed MC 2) Bleed proportioning valve 3) Possible replace soft lines 4) Bleed each wheel again. I saw something on this site that made sense, but I had never seen it before: Clamp off all the soft lines and test the pedal. If the pedal is solid, then the problem is at the wheels; if the pedal is soft, then it is the MC. Then unclamp each wheel one at a time - the "bad" wheel will be soft, the "good" wheels will have a firm pedal. Is this a bad idea? |
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Geezer914 |
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#2
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Geezer914 ![]() ![]() ![]() Group: Members Posts: 1,479 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States ![]() ![]() |
Get a pressure bleeder, best way to bleed the brakes. Replace the old brake lines first.
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ctc911ctc |
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#3
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Senior Member ![]() ![]() ![]() Group: Members Posts: 893 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States ![]() ![]() |
Get a pressure bleeder, best way to bleed the brakes. Replace the old brake lines first. (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) Super easy, the only way to go, |
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