Master Cylinder Replacement Challenges, Reservoir Lines and Single Pole Contact Options

[DennisV]

I've run into a couple challenges while replacing our brake system.

The new master cylinder has a single pole contact, whereas the original had 2-pole. I read somewhere that you just leave one wire detached. Do you lose some functionality doing that?


I am having a hard time getting the plastic lines that run to the fluid reservoir to naturally land in a position where they would connect. The old lines appear to be identical to each other. Whereas the new lines are different from each other with different part numbers found in the factory parts catalog. Has anyone else run into this? These came from Porsche and I triple checked the numbers on the bag against the catalog. I inserted them into the master cylinder per the indication of the factory parts catalog. I have done all sorts of twisting and contorting but would have to bend one of them substantially to get them to align with the reservoir hoses.


Thank you.

[Superhawk996]

Honestly - it doesn’t matter as long as lines aren’t touching and rubbing other things

I wouldn’t leave it the way you have it with hard lines touching and it looks like the brake line is putting stress on the reservoir feed line and rubber grommet.

You’ll either have to tweak the lines where they are at or move to the front.

I looked for pictures both of my own car (strike 1), PET (strike 2), and the factory service manual (strike 3) and didn’t come up with a clear definitive routing picture.

The bottom line is that the hard lines must not be touching / rubbing other things. That is a definite no-no when it comes to routing brake lines. You’d be amazed at how quickly two metal lines rubbing each other will wear a hole in one or both.

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