Service period- brake and fuel hoses?

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DJ.
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Service period- brake and fuel hoses?

Every winter, I enjoy doing a thorough service and check over on my Seven ready for the next year. I have changed the timing belt, spark plugs etc as recommended in a schedule I think I got from Caterham.

The two items I'm not sure about are the fuel hose and brake hoses.

The fuel hose (sigma engine) is the hard black plastic plastic (nylon?) type. I check it annually and no sign of leaks yet, but can only see the ends as it has a plastic sheath covering it. Does anyone know if it should be replaced at a certain age? 

The brakes hoses on my older cars used to be rubber and it was obvious when they needed doing. With stainless covering, inspection is impossible. Once agin, how often do people change these hoses?

Thanks

Duncan

Wrightpayne
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I’ve recently done the fuel hoses at 20 years. A company in Nuneaton can remake the hoses using the existing metal ends for £10ish per hose rather than £50+ from Caterham. The new hoses were noticeably more flexible.

I did read somewhere that the stainless braided nylon brake pipes do have a ‘life’. I guess they dont show fatigue like rubber ones. 

Ian

Geoff Brown
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The official Caterham recommendation as per their service schedule is for fuel lines to be replaced every six years & brake hoses every four years.

This replacement period could depend on mileage, usage, environment & where the vehicle is parked. But with everything like this a thorough inspection at each annual service should determine the condition of the fuel hoses. So replacement could be on condition. 

As for flexi brake hoses one cannot determine the condition of the inner so one either changes as recommended regardless of mileage, usage, environment or sail with the wind & change when the connections are corroded to hell & the braid is getting thin. Or when they unexpectedly leak!! 

 

anthonym
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very timely thread, thank you.

7 wonders of th...
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Worth making sure you use the correct spec fuel hose too - also beware of cheap imitations on the internet.

You need high pressure R9 hose or R10 if its fully submersed,

Gates, Goodyear, Codan or Conti all offer this.

Easy to cut the crimps off you old hoses and reuse the barbs and banjo's and refit with Oetiker clamps.

 

DJ.
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I received my kit in 2010, so next year the hoses will be 10 years old. I had heard the 4 years recommended for the brake hoses, but they always look perfect. I think I will change them this winter as I don't fancy one failing on track or the road.

The fuel hose, I can at least inspect  at either end, so I think I might leave it a few more years if all looks well.

Has anyone one had experience of either type of hose failing and if so at what age?

7 wonders of th...
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I'd be checking the fuel hoses..... if there marked R6 then they are not suitable for E5 fuel..... bear in mind the part in contact with the fuel is be bit you cant see....

 

DJ.
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This is the fuel pipe I have:

https://caterhamparts.co.uk/hoses/1176-fuel-pipe-pump-to-fuel-rail.html

It seems to have survived ok so far, it id very hard and not really flexible to start with and is still the same.

7 wonders of th...
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That looks like a hard plastic pipe with sheathing, 

DJ.
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Yes that's it, I think it is something like nylon, it hardly has to flex at all the way it is installed. Any idea how long it lasts? 

Jonathan Kay
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I'd be checking the fuel hoses..... if there marked R6 then they are not suitable for E5 fuel..... bear in mind the part in contact with the fuel is be bit you cant see....

It might now be wise to fit hoses etc that can take 10% ethanol... what's the type specification for that, please?

Thanks

Jonathan

PS: There's a recent discussion about vehicle fuel hose specifications and for how long they've been required to tolerate ethanol. IIRC it included the ASTM data but not that type of specification.

...

Edited: Found it, 2017.

J