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> I think I have a leak near the master brake cylinder, is this bad, or fixable?
914 RZ-1
post Mar 11 2023, 10:58 AM
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I am replacing the calipers on my car. After pumping the old fluid out, we realized the soft lines needed repair (they were fine before). Now, there is a link under the car that appears to be coming from the master cylinder:

Attached Image

The dark areas are wet with brake fluid.

Here is a closeup of the master cylinder. The dark areas are wet. The only spot that is not wet (yet) is the lighter area on the lower left:

Attached Image

I have checked the reservoir at the top and it is fine. The fluid is coming from somewhere down here.

Please advise!

Thanks!
-Jeff
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Craigers17
post Mar 11 2023, 06:51 PM
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You can just pull the steel parts of those reservoir lines off the mc....you might be able to wiggle them left to right or vice versa a bit, but they just pull out(You might want to make a note on which one goes where). You'll probably need to remove the the fittings on the side and reuse them on the new one.

When you reattach the new mc to the reservoir lines, it can be a pain in the ass. Some people seem to do it easily. Not me, I admittedly struggled. Here's a link to when I did it the first time.....it probably seems convoluted, and it may appear as if I'm an idiot, which would be true, but you might find something in there useful.

http://www.914world.com/bbs2/index.php?showtopic=348755
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post Mar 11 2023, 10:02 PM
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QUOTE(Craigers17 @ Mar 11 2023, 04:51 PM) *

You can just pull the steel parts of those reservoir lines off the mc....you might be able to wiggle them left to right or vice versa a bit, but they just pull out(You might want to make a note on which one goes where). You'll probably need to remove the the fittings on the side and reuse them on the new one.

When you reattach the new mc to the reservoir lines, it can be a pain in the ass. Some people seem to do it easily. Not me, I admittedly struggled. Here's a link to when I did it the first time.....it probably seems convoluted, and it may appear as if I'm an idiot, which would be true, but you might find something in there useful.

http://www.914world.com/bbs2/index.php?showtopic=348755


Thanks, this was helpful. (IMG:style_emoticons/default/beerchug.gif) I'll have to make sure I get the copper washers. I will try the assembly lube with the wrench trick as well. I have some glycerin from another project.
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Posts in this topic
914 RZ-1   I think I have a leak near the master brake cylinder   Mar 11 2023, 10:58 AM
Craigers17   Just to double check things, if you have carpet, I...   Mar 11 2023, 11:34 AM
914 RZ-1   Here's a view under the carpet. It's wet. ...   Mar 11 2023, 11:41 AM
brant   You need to pull the pedal board Then the rubber s...   Mar 11 2023, 11:42 AM
Craigers17   Based on that last picture, at a bare minimum, I d...   Mar 11 2023, 11:52 AM
Mikey914   1st, yank this out and clean up the fluid. I'd...   Mar 11 2023, 12:02 PM
914 RZ-1   1st, yank this out and clean up the fluid. I...   Mar 11 2023, 05:26 PM
930cabman   Time for a new Master Cylinder   Mar 11 2023, 02:45 PM
914 RZ-1   Yeah, I'm gonna clean this all up: pedal clust...   Mar 11 2023, 02:51 PM
bdstone914   Yeah, I'm gonna clean this all up: pedal clus...   Mar 11 2023, 03:38 PM
flyer86d   Replace the master cylinder. If your pedal cluster...   Mar 11 2023, 03:23 PM
troth   This was the result of a mc leak on my 911. I w...   Mar 11 2023, 03:26 PM
914 RZ-1   How do I get the lines on the top detached from th...   Mar 11 2023, 05:08 PM
Craigers17   You can just pull the steel parts of those reservo...   Mar 11 2023, 06:51 PM
914 RZ-1   You can just pull the steel parts of those reserv...   Mar 11 2023, 10:02 PM
Garland   Don’t forget the MC washers! “914 World ...   Mar 11 2023, 07:41 PM
76-914   A nickel to a donut your MC is toast. It will be m...   Mar 11 2023, 07:51 PM
914 RZ-1   I got it off. I just needed to pull it out a littl...   Mar 11 2023, 08:46 PM
bkrantz   What I like to do, for removing and installing the...   Mar 11 2023, 09:09 PM
914 RZ-1   What I like to do, for removing and installing th...   Mar 11 2023, 09:42 PM
Mikey914   Sorry was working in the shop today. Sounds like y...   Mar 11 2023, 09:52 PM
914 RZ-1   Which hoses from the reservoir go where? I've ...   Mar 11 2023, 09:59 PM
Mikey914   Which hoses from the reservoir go where? I've...   Mar 12 2023, 12:40 AM


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