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The mkiv Supra Owners Club

mk4. DUEL BRAKING SYSTEM?


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Hi Guys, Had brake failure two weeks back, a pipe had corroded inside the black plastic protection cover. I am about to replace all the piping with copper, but i would like to know if the Supras have a dual braking system, because if they do, then my system must be faulty as i had no brakes at all.

This kind of problem happened a few years ago on my old Merc, a rear brake pipe corroded and i was still left with just the front brakes working, i feel sure the Supras must have this in their design? Any info on this subject will be appreciated.

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I see alot of people use copper pipe and i wouldnt on a supra. People should be using stainless steel and steel nuts as the cylinder is steel and the flexi pipe fittings are steel to. Zinc coated steel would be fine.

 

Steel touching copper causes corrosion. Electrosys (typo?)

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11 hours ago, evinX said:

I see alot of people use copper pipe and i wouldnt on a supra. People should be using stainless steel and steel nuts as the cylinder is steel and the flexi pipe fittings are steel to. Zinc coated steel would be fine.

 

Steel touching copper causes corrosion. Electrosys (typo?)

I don't understand why anyone wouldn't just fit OEM lines, they are still available from Toyota, that's what I did when I replaced all 5 lines.

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1 hour ago, Burna said:

I don't understand why anyone wouldn't just fit OEM lines, they are still available from Toyota, that's what I did when I replaced all 5 lines.

Easily made up for a fraction of the price. Toyota are steel coated in plastic. Stainless steel would be much better imo

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1 minute ago, evinX said:

Easily made up for a fraction of the price. Toyota are steel coated in plastic. Stainless steel would be much better imo

To me it's not worth the time, hassle and labour. It's not about the cost of the parts, it's the easiest and quickest solution to the problem.

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4 minutes ago, Burna said:

To me it's not worth the time, hassle and labour. It's not about the cost of the parts, it's the easiest and quickest solution to the problem.

I agree but for me i cant rely on Toyota as parts are being discontinued constantly now. Im sure some of the lines for the NA are discontinued to

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12 hours ago, evinX said:

I see alot of people use copper pipe and i wouldnt on a supra. People should be using stainless steel and steel nuts as the cylinder is steel and the flexi pipe fittings are steel to. Zinc coated steel would be fine.

 

Steel touching copper causes corrosion. Electrosys (typo?)

The same galvanic corrosion process occurs when stainless steel touches plated steel (with Zinc content) the reaction will likely be to a lesser extent than copper with plated steel, but will still happen.

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