The steel fuel pipes on my 89 S4 are badly corroded in places
and sections will have to be replaced. The brake lines
are still looking good. Are the brake lines corrosion resistant
or should I, given the age of the car, be looking at relacing them
with non-rusting piping such as "Cunifer".

 

dont mess with brake lines they are made of a non corrosive metal,
the fuel lines were steel that was cadmium plated

 

I'm just about to start running all the brakes lines for my car... starting from scratch so I need to figure out what size to use and what the propper flaring is for all the ends.

 

Is there a reason to change the lines? Seems like a lot of effort for no gain...

 

any ides where to get rigid fuel line in the uk?????

 

How about this

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT

 

http://ubercooper2000.blogspot.com/2...st-part-1.html

Russell Stainless Brake lines, available at Jegs/Summit. I have the part number somewhere if you want it

 

Google "Automec" and "Oakes Tools" in the UK
for fuel and brake pipes, fittings and flaring tools.

 

Yeah i know about all the cunifer stuff.... just liked the idea of st/st or cad plated, less chance of road damage??

 

I'm installing an adjustable proportioning valve that can be adjusted from the cockpit... and I'm running an S4 master cylinder in place of the earlier version so NONE of the lines match up... that's about as good a reason as I can come up with to replace the 30+ year old lines with new stainless.

 

A reasonable answer!

Stainless line is available - just practice the metric double flares before doing the real lines.

 

Yes, exactly... I'm still trying to figure out which flare tool to buy to replicate those factory flared ends... in the research phase at the moment. I'm up for suggestions.

 

http://www.sjdiscounttools.com/otc6506.html

Think it will work?

 

I tried this route. I bought the tool from them and it sucked and was almost impossible to get a double flare right. Save it for the pros, major PITA.

 

I've got one of those tools - works fine for me on Kunifer.

I'm not sure how succesful you would be double flaring stainless pipe. As SS work hardens so much there is a big chance of creating splits or cracks in the second step of the flare. Stick with Kunifer - it's worked for 30 years why change.