Fuel pipe fittings?

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1949bug
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Fuel pipe fittings?

Post by 1949bug » Thu Feb 22, 2018 5:57 pm

Hi,

I’m in the final stages of recommissioning a 5a that last saw the road back in ‘89!

The 8mm nylon fuel pipe that feeds the mechanical fuel pump has been kindly hacked off just above the plastic clip on the chassis upright.

So I need to extend this or even replace the line from the tank.

Can anyone shed any light on how the nylon was connected to the pump, I’m assuming some sort of push fit to conventional hose.



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Fuel pipe fittings?

Post by MarkHawkins » Thu Feb 22, 2018 6:06 pm

Regular rubber type petrol pipe (R6 or better) would push over the nylon pipe and then go to the pump. If the car hasn't been on the road that long I'd replace all the petrol pipes - nylon included. Whats the state of the petrol tank? Have you run the car from a small can of petrol near the pump yet?


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1949bug
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Fuel pipe fittings?

Post by 1949bug » Thu Feb 22, 2018 6:59 pm

Yes I’ve pushed some pipe over the nylon and it appears not to leak but just wondering if there was a more ‘secure’ system. I’m reluctant to use jubilee clips without out an insert in the 8mm to stop it crushing but then that could restrict fuel flow?!

Well aware of modern petrol and rubber, it ate through the pipe on an escort RS I had and was a nightmare to replace with an I/d of 14mm.

Apart from the hacked nylon the actual pipe looks to be in good condition.

It’s got a stainless tank and is clean. The car was a genuine barn find and 29 years in a dry barn have really helped. Chassis has never seen a weld and doesn’t need any.

Yes had it running from temporary feed, though was a bit loud with open headers lol.



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Fuel pipe fittings?

Post by Roger Pennington » Thu Feb 22, 2018 7:14 pm

You shouldn't really use standard jubilee clips with fuel hose, they don't work well at that size. Much better are the clips designed for the job, either in ordinary steel or, better still, stainless. See here for ethanol-proof hose and stainless clips :)


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Fuel pipe fittings?

Post by derekoss » Thu Feb 22, 2018 7:15 pm

Many years ago I had a fire caused by a leak from the carb. Dripped on the floor. Throwing sand over it was bringing it under control.
Then the nylon pipe melted. It was a nice Ford Anglia that was!! Nearly the garage too.
Never used anything but metal (cupro nickel) and firesleeved flexible since.

Derek



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Post by 747PETE » Thu Feb 22, 2018 8:18 pm

I replaced the lines front to rear with Kunifer, a bit of a struggle but that should last forever.I made all the connections with Andy’s Biohose with the correct stainless clips.Hopefully that will last a long time. I was never a real fan of the nylon pipe and it would be pretty old by now anyway.



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Fuel pipe fittings?

Post by 1949bug » Thu Feb 22, 2018 8:37 pm

Roger Pennington wrote:
Thu Feb 22, 2018 7:14 pm
You shouldn't really use standard jubilee clips with fuel hose, they don't work well at that size. Much better are the clips designed for the job, either in ordinary steel or, better still, stainless. See here for ethanol-proof hose and stainless clips :)
Ironically actually have a bag of those but in the next size up! Time to order some small ones.



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Fuel pipe fittings?

Post by 1949bug » Thu Feb 22, 2018 8:41 pm

derekoss wrote:
Thu Feb 22, 2018 7:15 pm
Many years ago I had a fire caused by a leak from the carb. Dripped on the floor. Throwing sand over it was bringing it under control.
Then the nylon pipe melted. It was a nice Ford Anglia that was!! Nearly the garage too.
Never used anything but metal (cupro nickel) and firesleeved flexible since.

Derek
derekoss wrote:
Thu Feb 22, 2018 7:15 pm
Many years ago I had a fire caused by a leak from the carb. Dripped on the floor. Throwing sand over it was bringing it under control.
Then the nylon pipe melted. It was a nice Ford Anglia that was!! Nearly the garage too.
Never used anything but metal (cupro nickel) and firesleeved flexible since.

Derek
I’m tempted to go kunifer, I too had a car fire on an old escort rs1600i, not pleasant!



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Fuel pipe fittings?

Post by derekoss » Thu Feb 22, 2018 9:16 pm

The only reason for nylon is it's cheap ! Sadly most tanks are plastic but not ours. Look at the Liverpool car park fire ! There looks like being a rewrite of the building regs because of plastic tanks and fuel lines.

Kunifer is cupro nickel.

Derek



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Fuel pipe fittings?

Post by 1949bug » Thu Feb 22, 2018 10:21 pm

derekoss wrote:
Thu Feb 22, 2018 9:16 pm
The only reason for nylon is it's cheap ! Sadly most tanks are plastic but not ours. Look at the Liverpool car park fire ! There looks like being a rewrite of the building regs because of plastic tanks and fuel lines.

Kunifer is cupro nickel.

Derek
It was quicker to type. Lol

What size did you use 3/8”?



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Fuel pipe fittings?

Post by philhoward » Thu Feb 22, 2018 10:22 pm

8mm (5/16”) at a guess?


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Fuel pipe fittings?

Post by ScimmyMike » Fri Feb 23, 2018 11:03 am

derekoss wrote:
Thu Feb 22, 2018 9:16 pm
Look at the Liverpool car park fire ! There looks like being a rewrite of the building regs because of plastic tanks and fuel lines.
Really :shock: I was at a APS CPD seminar last night where possible changes to the regs were discussed at length with a Fire Engineer heavily involved in the reports on recent high profile incidents, it was mentioned by the audience and nothing confirmed back on this by him


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Fuel pipe fittings?

Post by gordonmc » Fri Feb 23, 2018 11:55 am

747PETE wrote:
Thu Feb 22, 2018 8:18 pm
I replaced the lines front to rear with Kunifer, a bit of a struggle but that should last forever.I made all the connections with Andy’s Biohose with the correct stainless clips.Hopefully that will last a long time. I was never a real fan of the nylon pipe and it would be pretty old by now anyway.
Exactly the way I went.
It was prompted by the nylon pipe kinking as I was trying to get the flexible pipe on. The nylon had gone brittle and I didn't trust it not to leak. Rather than mess about I replaced it with cupro nickel.



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Fuel pipe fittings?

Post by willholderogri » Fri Feb 23, 2018 1:10 pm

are we saying that the original nylon is not ethanol proof ?


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Fuel pipe fittings?

Post by philhoward » Fri Feb 23, 2018 1:34 pm

willholderogri wrote:
Fri Feb 23, 2018 1:10 pm
are we saying that the original nylon is not ethanol proof ?
Seems to be... When the initial FBHVC tests were underway to ascertain the possible issues with Ethanol in petrol, Nylon wasn't listed as an "at risk" material (unlike Copper - but I think Copper is now off the "endangered" list), the same as Kunifer/Cupro-Nickel wasn't an issue.

I don't believe the nylon is an issue in itself but like anything can suffer damage or misuse over its life.

Was certainly fine in all the applications I've come across to date.

A trick I picked up some time ago was to use a quick squirt of Carburettor cleaner as a lubricant to allow the rubber line to slide over the nylon. Seems to work fine, disappears easy enough afterwards and no ill effects.


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