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Re: Fuel filler hose change [Re: IvorMog] #635570
06/05/20 02:05 PM
06/05/20 02:05 PM
Joined: Dec 2013
Posts: 960
Newton Abbot, South Devon UK
Felix42 Offline
Talk Morgan Regular
Felix42  Offline
Talk Morgan Regular

Joined: Dec 2013
Posts: 960
Newton Abbot, South Devon UK
Older cars are fitter with nitrile butadine rubber (NBR) hoses. This rubber is resistent to the effects of petrol. NBR is very hard so it has to have included 5-10% plasticiser to make it supple enough. However, the ethanol now put into fuel leaches out the plasticiser so the rubber becomes very hard and brittle again and it cracks and splits easily.

I had this problem some time ago with my 5-year-old Roadster whose filler pipes cracked and dispensed several litres of 100 octane fuel on my very hot exhaust pipe (I was in Italy). I was lucky not to have been incinerated. I had a non-procuctive spat with Morgan about it.

In the end I got some bespoke silicone pipes made.


Last edited by Felix42; 06/05/20 02:09 PM.

John

Silver 2005 S1 Roadster V6 - Henrietta
Re: Fuel filler hose change [Re: IvorMog] #636279
09/05/20 02:39 PM
09/05/20 02:39 PM
Joined: Sep 2019
Posts: 65
Sanderstead
Tim Crump Offline
Just Getting Started
Tim Crump  Offline
Just Getting Started

Joined: Sep 2019
Posts: 65
Sanderstead
When I changed mine (on a 1998 +4) I rotated the filler cap so that the hinge is at the top. Made getting the garage pump filler nozzle in much easier and it also seemed to stop the blow back that made the trigger stop filling the car.
The big nut does not have to anything but finger tight, if you are lucky after undoing the hose you may be able to rotate the the body of the cap.
Cant remember if its the same size as a wheel nut.


Tim
Plus 4 2018
Re: Fuel filler hose change [Re: IvorMog] #637460
14/05/20 02:45 PM
14/05/20 02:45 PM
Joined: Apr 2017
Posts: 1,310
Staffordshire
IvorMog Offline OP
Has a lot to Say!
IvorMog  Offline OP
Has a lot to Say!

Joined: Apr 2017
Posts: 1,310
Staffordshire
Job done, thanks everyone for the comments and guidance.

In the end I bought a hose from John at Heart of England. Very helpful and despatched the hose very promptly.

It's identical to the OE hose and despite my trepidation it was relatively easy to fit with a bit of silicone. I also chamfered the inner edge of the filler end slightly as the spigot is actually nearer 53mm instead of nominal 51mm it's supposed to be.

I used my oil filter claw to loosen the big nut but it wasn't that tight anyway.

Coincidentally Tim, I also chose to mount the cap with the hinge at the top for the same reasons you suggest so we will see next time I fill up.


Bob

1999 4/4 2 litre Zetec
Re: Fuel filler hose change [Re: IvorMog] #637468
14/05/20 03:04 PM
14/05/20 03:04 PM
Joined: Oct 2010
Posts: 187
returned OggieMogger
R
Roady Offline
L - Learner Plates On
Roady  Offline
L - Learner Plates On
R

Joined: Oct 2010
Posts: 187
returned OggieMogger
My experience with our 2004 Roadster was a learning experience. I was told by the dealer that I needed a new pipe and, based upon shared knowledge about failures, I believed them. I then cut off a perfectly serviceable pipe swear and tried to replace it with a silicone one that I was told was a straight replacement that they'd had made. What they didn't seem to realise is that silicone pipes don't stretch like rubber ones . This meant that the 45mm pipe would not fit over the 50mm filler cap swear swear whatever I tried. The factory replacement fitted fine, albeit with the issues regarding flexing etc.

I don't go there any more.

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