G'day everyone,

Each weekend brings me a step closer to the finish of the buggy rebuild!!!!

Quick question:
Is it ok to use new fuel hose to connect between the brake fluid reservoire and the master-cylinder?????
(i'm pretty sure this would be ok but just wanting to make sure there's not some crazy ingredient in brake fluid that corrodes only fuel hoses!!!!!! )

What have others used??? This is a buggy so i'm unaware if there is a factory-type tubing/hose available - sorry.

Cheers,
Marty

i am pritty sure maybe 95% that there is a specific hose that has a nylon liner (white) and it looks like fuel line on the outside OR you can buy nylon air/oil line in all different colours but again not 100% sure how it stands up to brake fluid.

MUST use the correct hose for brake fluid. The VW hose looks similar to the cloth covered fuel hose but blue in colour. Pretty exxy but available at a good dub shop I believe.

Geez, thanks guys lucky i asked the question. Was very close to just throwing on some fuel line!!!!!

Will suss it out!!!!!

Marty

I've had fuel hose in one of mine since 1991. No problems yet... the dramas I've had have *always* been with the OE VW 'blue' hose (but always original fit, old, brittle stuff). Brake fluid is designed to very kind to all sorts of rubber seals and hoses

Come and have a look... I will be replacing them soon as part of a rebuild. But - no problems so far. Have i simply been lucky?

IMO I'd say you have been very lucky, although I'm not a rubber specialist, I have been involved id some rubber product engineering and know that there are different rubber compounds for different jobs, and brake fluid has a very different range of requirements than say for fuel or oil. Using fuel hose you are very likely to see the rubber degrade that can cause small fragments to block the internal ports in the master cylinder which could easily cause brake failure.....NOT GOOD. You may notice when working on brake systems that you're advised to only use brake fluid or rubber grease for lube. That is because brake component rubbers and seals DO NOT with stand hydrocarbons (oil based products) .

Solvent/fuel in brakes hoses is bad mmm-kay but brake fluid in solvent hoses seems fine

Hey guys,

Would transmission hose be ok for this application???

Marty

I agree with matberrry only the correct brake hose should be used,I have seen fuel and high quality multi purpose hose used and in each case the fluid seeps through the casing. Use the right hose and save yourself the heartache and expense. cheers les

You could test it by immerse a piece of hose in some brake fluid for a few years and see if it swells or perishes.

Sorry if I'm a pia

...the inside of mine has been in brake fluid since March 1991

But in general, I agree - use the right product for the right task.

Another quick question in keeping with the brake fluid theme:

Which is ok and What is the best fluid to use, DOT 3 or DOT 4???? (in a new dual circuit master cylinder system)


Marty

Dot 4 supersedes dot 3 in most cases but toyota currently specify dot 3 for most of their vehicles.

I guess what i'm really asking is DOT 4 ok in a new VW type 1 master cylinder brake system????

Marty