Author Topic: Petrol Tap Repair with O-Rings  (Read 448 times)

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Offline maroon1953

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Petrol Tap Repair with O-Rings
« on: November 06, 2018, 04:38:46 pm »
I do some petrol tap repairs with O-Rings (3x3mm) instead of cork on roud plunger type taps.
The rings worked well for around 2 weeks, but then the rubber is growing bigger and the o-rings will fall to ruin.

I´m afraid the o-rings are not safe to modern fluel.

Has anyone experience with resistant rubbers?

Michael

Offline timsdad

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Re: Petrol Tap Repair with O-Rings
« Reply #1 on: November 06, 2018, 05:33:12 pm »
I think O rings designed for fuel systems would work - like are used in fuel injector and fuel pumps. You could try and buy some of the correct size from a fuel injector specialist on an industrial estate, Michael.


Ray
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Offline Brillandy

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Re: Petrol Tap Repair with O-Rings
« Reply #2 on: November 06, 2018, 05:59:33 pm »
This company offers a whole range of Nitrile, EPDM and Viton O rings: https://simplybearings.co.uk/shop/

Nitrile or Viton should be fuel proof - don't know about EDPM.

Andy
« Last Edit: November 06, 2018, 06:03:23 pm by Brillandy »
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Online donkey

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Re: Petrol Tap Repair with O-Rings
« Reply #3 on: November 06, 2018, 06:08:28 pm »
I bought some O rings off e bay from the U.S.A  through a U.K. seller that were designed for fuel injection systems and the have been no problem in the 2 years since I fitted them.
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Offline camman3

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Re: Petrol Tap Repair with O-Rings
« Reply #4 on: November 06, 2018, 06:15:17 pm »
As Andy said simplybearings sell all types, and this page describes their properties
https://simplybearings.co.uk/shop/Seals-O-Ring-Seals/c19_4501/index.html

Graham
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Offline hampshirebiker

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Re: Petrol Tap Repair with O-Rings
« Reply #5 on: November 06, 2018, 06:15:54 pm »
I don't think it's anything to do with modern fuel Michael. Some rubbers just aren't suitable for petrol.
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Offline Lilyloodles

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Re: Petrol Tap Repair with O-Rings
« Reply #6 on: November 07, 2018, 11:41:10 am »
I replaced my corks on the Douglas taps with rubber O rings that I bought from ebay and they lasted approx 1 month!

Offline Owen

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Re: Petrol Tap Repair with O-Rings
« Reply #7 on: November 07, 2018, 03:36:11 pm »
As has been said before. You need to get the correct material or not bother. Nitrile or viton would be the best to go for.
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Offline maroon1953

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Re: Petrol Tap Repair with O-Rings
« Reply #8 on: November 08, 2018, 05:12:36 pm »


Thanks for your answers.
I will try to get suitable Nitrile or viton o-ring here in Germany.

Lilyloodles, it seems so you have the same problem!
I have also fitted "wrong" rings to my T35 Ewarts tap; it´s leaking again!

Michael

Offline chaterlea25

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Re: Petrol Tap Repair with O-Rings
« Reply #9 on: November 08, 2018, 06:57:09 pm »
Hi All,
Some years ago I bought some O rings that were advertised as suitable for petrol taps from eBay USA
They "worked" to a degree after I added one more than the instructions said (It pissed everywhere after following the instructions)
BUT the tap always passed a drip of fuel in the off position  >:( it was also very stiff to operate
As the O rings pass over the in and out holes in the tap body they eventually get chewed away  >:(
I went back to a normal "proper" cork and this has been fine

John