This must be a supplier thing

[onlinebiker]

Our 99 SC2 (A) blew out a brake line - in the usual spot - under the driver' s door. It was the passenger's side line.

Odd thing - it was very rusty and brittle, with hard scale rust - but - the driver' s side was 90% clean with only mild surface rust.

Normally I would just replace both - but this time?

I decided to just do one.

All I can figure is that the two lines had different metalurgy - and may have come from different suppliers.

Anyone else ever run into this?

[bumpdraft]

It might be that rust begets rust.
More better rust paranoia** needed in late August, when everything is dry and life is easy POR15

**for ex. l am adding tie wire safety anchors to my exhaust system for when a support or flange gives out. I don’t want to drop the midpipe into a pothole or transverse crack.

[TomM96]

During early 80s I replaced brakelines on a '73 Chevy pickup.

By that point I had discovered that the aftermarket lines from NAPA
began to rust after a year or two, while the ones from GM lasted
at least 5-10 years.

Thickness of the galvanizing is a lot of it. But odd to see one of the two
Sat lines go without the other.

[ultravioletnk]

Originally Posted by onlinebiker

All I can figure is that the two lines had different metalurgy - and may have come from different suppliers.

Anyone else ever run into this?

it might've just been a manufacturing defect, such things do happen... and i'm lucky here in co but i've never had a brake line rust out on any of my vehicles.

[TomM96]

On both my '97 & 2000 both lines were pretty similar. However, I Do
now recall that one (likely the inboard one) on my 2000 Did have a bit
more degradation, which I scraped off prior painting it.

I only remember this because it was just last November that I painted them.
I recall wondering, why is this??