Fuel smell

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Re: Fuel smell

Post by philhoward » Tue Jan 03, 2017 10:45 am

Firstly it work hardens and cracks if exposed to vibration.

Secondly, it is believed that Copper isn't really Ethanol proof (reports of copper fuel tanks and equipment being affected by Ethanol via the FBHVC).


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Re: Fuel smell

Post by Dave McGregor » Tue Jan 03, 2017 11:04 am

Wow that is worrying. I replaced my plastic fuel line with copper more than 10 years ago now. So far without problem; gulp!! Surely work hardening would be more of a problem on brake lines though?
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Re: Fuel smell

Post by philhoward » Tue Jan 03, 2017 11:13 am

You are more likely to experience vibration on brake lines at a guess but there is still a slight risk - IMHO.

Given a choice if replacing it, I'd still use Nylon personally (and do).


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Re: Fuel smell

Post by metalmoth » Tue Jan 03, 2017 12:07 pm

Where can I get some nylon fuel line then?


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Re: Fuel smell

Post by philhoward » Tue Jan 03, 2017 12:46 pm



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Re: Fuel smell

Post by metalmoth » Tue Jan 03, 2017 1:21 pm

Thanks for the link . Is it suitable for ethanol though?


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Re: Fuel smell

Post by philhoward » Tue Jan 03, 2017 1:23 pm

All nylon tube is.


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Re: Fuel smell

Post by scmarf » Tue Jan 03, 2017 1:53 pm

Listings include many inserts I notice (see previous discussion).


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Re: Fuel smell

Post by philhoward » Tue Jan 03, 2017 2:03 pm

I did see that..


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Re: Fuel smell

Post by metalmoth » Tue Jan 03, 2017 2:10 pm

Could be the way to go . Saw the inserts too. Will look into it . Thanks


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Re: Fuel smell

Post by derekoss » Tue Jan 03, 2017 2:41 pm

If you have copper properly installed you have nothing to worry about. This means attached to a rigid surface at suitable intervals with a flexible hose to the engine. There is no vibration in a car chassis to affect properly supported copper.
Attaching copper to a vibrating solid won't affect the copper unless parts the copper are allowed to vibrate in relation to itself. i.e. work harden.

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Re: Fuel smell

Post by Dave McGregor » Tue Jan 03, 2017 4:47 pm

Thanks for that Derek. I have to admit to a bit of worry there. I only use petrol for starting and then switch to LPG but even so there is still ethanol lying in the pipes.



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Re: Fuel smell

Post by Old and Slow » Tue Jan 03, 2017 4:53 pm

Oxford Brookes University has published research papers on the corrosive effects of ethanol on carburettor components (brass jets and rubber "O" rings). Their conclusions are that ethanol has zero effect on brass in any concentration in fuel, including with added water. The rubber was degraded, by a combination of petrol and ethanol with water.
IMO it matters not whether you use brass or copper, the fuel won't corrode it. The rubber fuel hose however.......


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Re: Fuel smell

Post by haustrup » Mon Feb 06, 2017 11:12 am

I noticed the mentioning of fuel hose clips with three ears - How do they look like - I've only found ones with two ears?
What are you members using as inserts within the plastic fuel lines to avoid cracking or deforming when clamping?



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Re: Fuel smell

Post by Dennis Nicholas » Mon Feb 06, 2017 12:13 pm

metalmoth wrote:I replaced the fuel filler hose etc and fitted all the filler neck parts in the correct way as diagram. All good now with no fuel smell. But when I got it out of the garage yesterday it has just started leaking from the new R6 fuel hose I fitted about a month ago. Clip was tight but it was pouring out of the end where it joins the plastic pipe. I cannot believe how much trouble I've had with the fuel system. Anybody had a problem with new rubber hose and ethanol? I presume this is the cause
Problem sounds to be more due to type of hose clip. The normal worm type just distorts the nylon where the rubber fits over. 2 or 3 eared spring hose bands are good and there are other makers that do specific hose clamps/clips for fuel lines.


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