I think I have a leak near the master brake cylinder, is this bad, or fixable? Options

[914 RZ-1]

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:



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:



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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[Mikey914]

1st, yank this out and clean up the fluid. I'd personally de-grease the metal and hit with POR15. I don;t think the MC is toast. The pattern of fluid indicates a leak from the top.
It could be a simple as the rubber intake lines aren't pushed in all the way.
Do check the lines coming down.

When the hoses fail (and many did as the hose MUST be hydraulic rated hose) as wrong ones that look the same get used, this is what it looks like. Other than the clean up, this might be easier than you think.

You mentioned the soft lines needed to be replaced, I suspect this is the issue. The material is significantly more expensive, but you don't need mch. I have both here for $12
-https://914rubber.com/new-brake-hose-9mm-set-of-2

Sorry no picture, I'll ask Blake to get it up.

-Mark

[914 RZ-1]

1st, yank this out and clean up the fluid. I'd personally de-grease the metal and hit with POR15. I don;t think the MC is toast. The pattern of fluid indicates a leak from the top.
It could be a simple as the rubber intake lines aren't pushed in all the way.
Do check the lines coming down.

When the hoses fail (and many did as the hose MUST be hydraulic rated hose) as wrong ones that look the same get used, this is what it looks like. Other than the clean up, this might be easier than you think.

You mentioned the soft lines needed to be replaced, I suspect this is the issue. The material is significantly more expensive, but you don't need mch. I have both here for $12
-https://914rubber.com/new-brake-hose-9mm-set-of-2

Sorry no picture, I'll ask Blake to get it up.

-Mark

@Mikey914 How do I get the hoses from the reservoir to the MC off? Is there some trick to disconnecting them at the ?MC?

And how would I install the new ones? Is installing them just a matter of fishing the new ones down?

It doesn't look like its those lines; the leak appears to be in the piston, but I may as well replace the reservoir lines as well.

Thanks!
-Jeff
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