LEAKING FUEL CAP

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poppyman
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LEAKING FUEL CAP

#1 Post by poppyman » Mon Jun 05, 2017 11:27 am

hi chaps,
i am new to the forum and have a problem with fuel spilling out of the fuel cap when cornering.
i have a 2500s saloon and it is fitted with an after market locking one.
all the seals are intact.
am i better going for a standard one? and if so can anyone tell me where to get a decent one from?
any help really appreciated.

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valencia
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Re: LEAKING FUEL CAP

#2 Post by valencia » Mon Jun 05, 2017 3:41 pm

Hello and welcome to the forum,
I would think that both standard and aftermarket locking fuel caps are ok, mine is lockable and it's been there over 30 years.
The cap can either leak from it's own sealing ring or some leakage can come from under the neck of the filler, mine leaked from under the neck so I cut a rubber washer to fit. It's now been ok for years-but you need the correct rubber material, I bought some from and auto jumble stall.
Mike Hasleden

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Dave B
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Re: LEAKING FUEL CAP

#3 Post by Dave B » Mon Jun 05, 2017 5:48 pm

It would appear that aftermarket fuel caps mostly leak with a full tank on right hand turns, but some don't, apparently. I never had any success with the locking ones in the past, but I never had a leaky standard one!
Buy a PI, you'll never have a full tank :roll:
http://www.chriswitor.com/proddetail.php?prod=618389RM
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poppyman
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Re: LEAKING FUEL CAP

#4 Post by poppyman » Tue Jun 06, 2017 1:49 pm

thanks for the replies :)
i have ordered one from chris wittor so will keep my fingers crossed :)
as to buying a pi? its bad enough with a 2.5 auto :lol:

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Re: LEAKING FUEL CAP

#5 Post by johnnydog » Tue Jun 06, 2017 8:21 pm

Over the years, I too have tried locking filler caps on my Triumphs, and I never had one that wouldn't dribble fuel as Dave says on right hand lock, especially with anything more than half a tank of fuel.
I reverted back to the original non locking cap on all mine; however, they never get left out out overnight anywhere where I would have been dubious about returning to the car to find the petrol had been syphoned.....

Leaking fuel caps have always been an issue with our Triumphs - good old 5* fuel leaking from the fuel filler caps used to instantly strip the in house applied 'day glow orange' cellulose livery on the Triumph 2000/2500's in the Lancashire Police fleet; hence the decision to paint the all the side panels except the rear nearside wing which, to the unknowlegable, looked rather odd......
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1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red

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Hmmm.....

#6 Post by sprint95m » Wed Jun 07, 2017 9:39 am

Not the prettiest solution,
I retained the original cap and fitted a lock into the filler flap.
(This lock actually came from an Austin Ambassador but there were lots of other suitable ones).
Ian,
owner of a Dolomite (1850) now after having run a 2500S (for 4 years), a Dolomite 1500HL (for a few months),
a Dolomite Sprint (for 10 years) and a second 2500S (for 5 years until 2007).

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