COX1E Posted September 28, 2012 Share Posted September 28, 2012 Hello,Thanks for the replies. The whole breather thing was where I was going with this thread.Basically the original cumbled, so I did the piece of pipe with the bolt in, and the car kept breaking down. Once the pipe wqas removed it worked fine, albeit a little bit smelly :) I have now fitted a new breather rubber on the filler cap, so that should allow it to breathe. I will do the pipe with bolt again and see if I break down. If I do, then the one way valve will be the next option. If that is the case, where would I get the one way valve from? Is that something the local motor factors would sell?Many thanks for all replies, much appreciated Quote Link to comment Share on other sites More sharing options...
Velocita Rosso Posted September 28, 2012 Share Posted September 28, 2012 4304 wrote:Hello,Thanks for the replies. The whole breather thing was where I was going with this thread.Basically the original cumbled, so I did the piece of pipe with the bolt in, and the car kept breaking down. Once the pipe wqas removed it worked fine, albeit a little bit smelly :) I have now fitted a new breather rubber on the filler cap, so that should allow it to breathe. I will do the pipe with bolt again and see if I break down. If I do, then the one way valve will be the next option. If that is the case, where would I get the one way valve from? Is that something the local motor factors would sell?Many thanks for all replies, much appreciatedYes a local factor will have them on the shelf as they are used in modern carsIts about 50mm long ,one tail into the valve so rubber from top of tank to the `in` then a rubber on the `out` tail and then to atmosphere. Cost about £3.00The MK 1/2/3 tanks breathed through the cap and 4/1500 breathed through vent tube Quote Link to comment Share on other sites More sharing options...
aar0sc Posted September 28, 2012 Share Posted September 28, 2012 You sure about that? My 1500 vents through the cap... US 1500s have the vent tube. Quote Link to comment Share on other sites More sharing options...
Velocita Rosso Posted September 28, 2012 Share Posted September 28, 2012 3122 wrote:You sure about that? My 1500 vents through the cap... US 1500s have the vent tube. Depends what tank was put in itIf some one fitted a 1/2/3/ tank then they would have had to fitted the cap to suit. Have you got the breather tube on the top of the tank of yours?If you look at the tank specs on the Rimmer bros site you will see what I mean Quote Link to comment Share on other sites More sharing options...
aar0sc Posted September 28, 2012 Share Posted September 28, 2012 I've got the thing on the tank for an external breather, but I was under the impression that UK cars had it blanked off, as mine is. http://www.canleyclassics.com/?xhtml=xhtml/diagram/spitfire1500petroltank.html&xhtmlcatalogue=xhtml/catalogue/spitfire1500.html&category=fuelandexhaust&xsl=diagram.xsl158554 - that's the plug over what the Americans used as a vented hose thingy whatsit. Quote Link to comment Share on other sites More sharing options...
WIMPUS Posted September 28, 2012 Share Posted September 28, 2012 3122 wrote:I've got the thing on the tank for an external breather, but I was under the impression that UK cars had it blanked off, as mine is. http://www.canleyclassics.com/?xhtml=xhtml/diagram/spitfire1500petroltank.html&xhtmlcatalogue=xhtml/catalogue/spitfire1500.html&category=fuelandexhaust&xsl=diagram.xsl158554 - that's the plug over what the Americans used as a vented hose thingy whatsit. just like mine , but also with mine the rubber plug was rotten on mine , so a piece of fuel line and a bolt ;) Quote Link to comment Share on other sites More sharing options...
aar0sc Posted September 28, 2012 Share Posted September 28, 2012 4526 wrote:just like mine , but also with mine the rubber plug was rotten on mine , so a piece of fuel line and a bolt ;)yeah, that's what mine's got now! Quote Link to comment Share on other sites More sharing options...
WIMPUS Posted September 28, 2012 Share Posted September 28, 2012 3122 wrote:yeah, that's what mine's got now! ;) Quote Link to comment Share on other sites More sharing options...
junkuser Posted September 28, 2012 Share Posted September 28, 2012 A one way valve will result in pressurising of the tank when hot (assuming you do get hot days) if the tank is otherwise sealed. Quote Link to comment Share on other sites More sharing options...
COX1E Posted October 1, 2012 Share Posted October 1, 2012 Hello,I can't see there being much heat around for a wile, so I have fitted the one way valve. Now the car runs well and smells as it should!Many thanks for your helpSteve Quote Link to comment Share on other sites More sharing options...
junkuser Posted October 2, 2012 Share Posted October 2, 2012 Venting beneath the car via a charcoal canister is worth considering as a final solution. Quote Link to comment Share on other sites More sharing options...
Jo Ann Posted October 16, 2015 Share Posted October 16, 2015 Hi AllI just got my Spitfire 1979 back from long term storage and there severe work up . She is doing great now besides this really severe smell of gas. You could pass out in my garage. Nothing is leaking on the floor? Do you all think it is my gas cap? Is there a rubber gasket in the gas cap? Perhaps rotted away due to age? Quote Link to comment Share on other sites More sharing options...
Nick Moore Posted October 17, 2015 Share Posted October 17, 2015 It could be perished rubber in the fuel cap, but my bet would be on perished fuel hoses or overflowing carburettor float chambers. I'd recommend replacing all the fuel hoses with ethanol-resistant hose (I think the spec is R9), check all the hose clamps are tight, make sure the fuel pump isn't leaking and see whether there's fuel on the carburettor's overflow vent pipes, if it has them. Quote Link to comment Share on other sites More sharing options...
nang Posted October 17, 2015 Share Posted October 17, 2015 Yes, My MK4 had a strong fuel smell. cap rubber seal had perished, replaced and all good now.Tony. Quote Link to comment Share on other sites More sharing options...
ODIN Posted October 17, 2015 Share Posted October 17, 2015 .On UK models, tank venting is via cap diaphragm seal The tank vent is just blanked off with this blind ended rubber seal- which perishes and gives rise to the petrol in cabin smell.The best answer? = Go to plumber's merchant or B& Q and buy a microbore central heating stop-end (8mm compression fitting)Fits in seconds and it looks like it's an original part-rather than bolt in tube etc"Fit and Forget" Quote Link to comment Share on other sites More sharing options...
Piero franchi Posted October 17, 2015 Share Posted October 17, 2015 my two cents worth.I would first look to see if I had a vented cap, you could have a non vented cap but its letting in air via the cap seal.either way, take the cap off and blow in the funnel to see if it breaths DONT GUESS, I non vented petrol cap that has its tank breather plugged up is not a good idea,the one way valve will pressuerise the tank (as had been said) if your tank does not have a vented filler cap.if it does have the vented filler cap, you dont have the need for the one way valve, waist of money, just plug the tank breather.to conclude, its not rocket science, just take off the filler cap, test it and act accordingly Quote Link to comment Share on other sites More sharing options...
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