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Fuel hose problems

I found this thread on the Locost website and t contains some useful pointers when buying petrol hoses.

David Jenkins

LocostBuilders builder's forum, posted on 4/4/11 at 03:06 PM

Fuel pipe research (long!) - for discussion! You may recall that I had a rant about rotting flexible fuel pipe a while ago (LINKY). In the end I did a lot of internet research, and came up with the following observations:


Results of research

What got me angry...

Last thoughts and recommendations

It was almost certainly stale fuel that rotted my fuel pipe(s).

  1. Don't buy general-purpose hose from a motor factor, unless it has at least 30R9 printed on it. Even stuff off the Gates stand isn't good enough.
  2. If you are getting it via the internet or mail order, don't be fobbed off by excuses. Only the proper stuff is safe for long-term use.
  3. If you are going to leave your car unused for a month or so, consider draining the petrol, especially if you are unsure of your fuel pipe grade.
  4. If you really can't get 30R9, consider getting ISO 7480 - this is easily available from marine suppliers in the UK (but see point 3). All proper fuel pipe in this grade has to be marked, to meet regulations.

Additional thought

Re-reading some of the websites I found during this research reminded me of an important indication of fuel pipe decay - smell.

If you go into your garage and there is a stink of petrol, but you can't find a leak, then it is very likely that vapour is permeating through the fuel hose. If this is the case then it is a fair bet that the hose will fail sometime in the near future... maybe not immediately, but sometime.

[Edited on 5/4/11 by David Jenkins]

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