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deaallen



Member Since: 15 Feb 2016
Location: Basingstoke
Posts: 263
United Kingdom 2012 Defender 90 Puma 2.2 SW Santorini Black
Fishy smell coming from fuel cap?
So this is something that has been bothering me for a while, but only notice it when filling my truck up. For some reason my fuel cap stinks of fish Shocked

I'm not sure if this is caused by the diesel or the actual cap (Its an Optimill cap) or something else altogether more weird Confused
Post #784602 2nd Aug 2019 10:23pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7682
2011 Defender 110 Puma 2.4 USW Stornoway Grey
do you use an additive? Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #784647 3rd Aug 2019 9:51am
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deaallen



Member Since: 15 Feb 2016
Location: Basingstoke
Posts: 263
United Kingdom 2012 Defender 90 Puma 2.2 SW Santorini Black
Nope, never have
Post #784821 4th Aug 2019 12:36pm
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Sulisuli



Member Since: 30 Oct 2016
Location: South west
Posts: 4789
United Kingdom 2015 Defender 90 Puma 2.2 HT Corris Grey
What kind of mileage do you do annually? 2015 HT XS 90
2008 SVX 90
2000 XS TD5 90
Post #784900 4th Aug 2019 8:42pm
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deaallen



Member Since: 15 Feb 2016
Location: Basingstoke
Posts: 263
United Kingdom 2012 Defender 90 Puma 2.2 SW Santorini Black
Only around 8k - I use another two cars as my daily drivers
Post #784942 5th Aug 2019 8:05am
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Sulisuli



Member Since: 30 Oct 2016
Location: South west
Posts: 4789
United Kingdom 2015 Defender 90 Puma 2.2 HT Corris Grey
I did wonder if the diesel was deteriorating in the tank giving off the smell you describe but given the mileage you do that can’t be the case.

Is it the rubber filler hose that is giving off the odour? 2015 HT XS 90
2008 SVX 90
2000 XS TD5 90
Post #784986 5th Aug 2019 1:00pm
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deaallen



Member Since: 15 Feb 2016
Location: Basingstoke
Posts: 263
United Kingdom 2012 Defender 90 Puma 2.2 SW Santorini Black
I'm not really sure, its hard to tell but it seems like its coming from the optimil fuel cap, that has a rubber oring in it so maybe its that, but whenever I take it off the smell lingers on my fingers shortly after aswell Embarassed Obviously not the best thing for fingers to smell like Laughing
Post #784996 5th Aug 2019 1:42pm
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Sulisuli



Member Since: 30 Oct 2016
Location: South west
Posts: 4789
United Kingdom 2015 Defender 90 Puma 2.2 HT Corris Grey
I too have an Optimill fuel cap so I guess I need to go outside and sniff mine now Rolling with laughter can’t believe I have just admitted that on a public forum Rolling with laughter I will let you know how I get on subject to not being arrested and detained for being a fuel cap sniffer Rolling with laughter 2015 HT XS 90
2008 SVX 90
2000 XS TD5 90
Post #785000 5th Aug 2019 1:48pm
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Swine&Small



Member Since: 20 Mar 2017
Location: Norfolk
Posts: 1223
United Kingdom 
Bicycle seats next Rolling with laughter 1983 Series 3 Pick up in Marine Blue
1967 Morris Traveller
1966 Morris Convertible
2012 VW T5 Camper
Quod Abundat Non Obstat.
Post #785005 5th Aug 2019 2:26pm
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Sulisuli



Member Since: 30 Oct 2016
Location: South west
Posts: 4789
United Kingdom 2015 Defender 90 Puma 2.2 HT Corris Grey
Well I can confirm that mine doesn’t smell fishy Rolling with laughter 2015 HT XS 90
2008 SVX 90
2000 XS TD5 90
Post #785033 5th Aug 2019 6:09pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1568
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
jst wrote:
do you use an additive?


That’s snake oil- not fish oil Laughing
Post #785037 5th Aug 2019 6:20pm
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Dutch Guy



Member Since: 13 Nov 2017
Location: Hekelingen
Posts: 16
Netherlands 2005 Defender 90 Td5 XS CSW Zambezi Silver
my best guess would be you refueled using biodiesel (blend of diesel with FAME) derived from UCO - short for used cooking oil. In the land of fish and chips I would assume that will be fishy....

It is well known that FAME has a tendency to affect parts made out of polymers, rubbers etc.
Post #785054 5th Aug 2019 6:59pm
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gilarion



Member Since: 05 Dec 2013
Location: Wales
Posts: 5084
Wales 2007 Defender 90 Other CSW Trident Green
Oh! dear Rolling with laughter Rolling with laughter but worth giving you the advice Laughing

It sounds as if you are suffering from

Trimethylaminuria ('fish odour syndrome')

Trimethylaminuria (TMAU) is an uncommon condition that causes an unpleasant, fishy smell. It's also called "fish odour syndrome".

There's currently no cure.
Symptoms of trimethylaminuria

Trimethylaminuria symptoms can be present from birth, but they may not start until later in life

The only symptom is an unpleasant smell, typically of rotting fish

Things that can make it worse include:

sweating
stress
certain foods – such as eggs and beans

The NHS advises seeing a GP if you notice a strong, unpleasant smell that doesn't go away. For those who like Welsh Mountains and narrow boats have a look at my videos and photos at..

http://www.youtube.com/user/conwy1
Post #785055 5th Aug 2019 7:06pm
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Rashers



Member Since: 21 Jun 2015
Location: Norfolk
Posts: 3335
United Kingdom 2014 Defender 110 Puma 2.2 USW Corris Grey
Bow down Sorry gilarion. I thought that was a wind up. And then I googled it Shocked
Post #785063 5th Aug 2019 7:39pm
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deaallen



Member Since: 15 Feb 2016
Location: Basingstoke
Posts: 263
United Kingdom 2012 Defender 90 Puma 2.2 SW Santorini Black
gilarion wrote:

It sounds as if you are suffering from

Trimethylaminuria ('fish odour syndrome')



Let me be clear, it is only my defender suffering Trimethylaminuria, not me Shocked Laughing
Post #785121 5th Aug 2019 10:07pm
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