Brake line diameter

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Jan 28, 2013 | 08:30 PM

EDQ

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Heel & Toe

Joined: Oct 2012

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Brake line diameter

Need to replace a couple of steel brake lines on my '86, does anyone know what diameter I should get - is it 6mm or something else?

Jan 29, 2013 | 01:12 AM

WVZR-1

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Quote:

Originally Posted by EDQ

Need to replace a couple of steel brake lines on my '86, does anyone know what diameter I should get - is it 6mm or something else?

You don't mention specific pipes that you intend on doing but I believe you'll find the majority of the pipes 3/16 BUT I believe at every connection point you'll find the it's got an M10X1 ISO/BUBBLE nut. The flare on these in NOT a conventional double flare but an ISO/BUBBLE flare that requires a different flaring tool. You'll either need to salvage your fittings or find new, I don't recall seeing lengths of pre-made with ISO/BUBBLE already supplied. Now if either of the pipes at the master cylinder are involved the fittings/nut are dramatically different to avoid accidentally swapping the connection.

You can buy an inexpensive bar type flaring tool that will do ISO/BUBBLE and they're much easier to accomplish than the double-inverted flare.

Here's an image that displays both(ISO/BUBBLE TOP/Double inverted flare bottom):

Last edited by WVZR-1; Jan 29, 2013 at 01:20 AM.

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