On my old car I had these installed. Evuntually I needed new front calipers and seals for the master cylinder. The brake shop told me it was caused by the SS lines. He said that they provide no back pressure and this causes the seals in the calipers and the master cylinder to go bad. Is this true? I would like to purchase these for my Z, but won't if this is the case.
Thanks for the info,

Matt

 

No "back pressure"??

Sounds like a load of bovine material, but lets explore the concept.

The SS lines are sold with the concept that they don't expand under pressure, thus delivering the pedal pressure to the calipers. So, moving from the rubber OEMs to SS lines increases the pressure at the pad, seals, etc. I wouldn't call this "back pressure", since it is not going backwards, just a more precise delivery of pressure.

Q) Are the seals designed to take on that % more of pressure?? hummm....

or

Q') What is de "delta" between regular lines and SS lines, and is the system setup to work at that pressure?

Somehow I think the % is very small...

 

Its hard to even begin to understand his statement that no backpressure causes seals (or anything to fail). Maybe he thinks that the added 'expansion' of the stock brake lines is necessary when the ABS kicks in. I don't know but another question, which was posed in another thread, is why Nissan has such a complicated brake line for the front brakes--3 separate lines with junction blocks.

I replaced my brake lines with ss braided StopTech. StopTech never even mentioned the complicated Nissan lines or any concerns about their 'simpler' lines. I'm sure many of us have replaced with braided lines on most of our cars and never had any difficulties.

 

Its hard to even begin to understand his statement that lack of 'back pressure' causes seals (or anything) to fail. I would think that in any closed hydraulic system the pressure is the same throughout. Maybe he thinks that the added 'expansion' of the stock brake lines is necessary to prevent seals leaking when the ABS kicks in.

I don't know but another question, which was posed in another thread, is why Nissan has such a complicated brake line for the front brakes--3 separate lines with junction blocks.

I replaced my brake lines with ss braided StopTech. StopTech never mentioned the complicated Nissan lines or any concerns about about replacing with their 'simpler' lines. I'm sure many of us have replaced with braided lines on other cars and never had any difficulties.