ECR Posted February 14, 2016 Share Posted February 14, 2016 Can someone point me to the tank breather that's commonly used ? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 14, 2016 Member Share Posted February 14, 2016 Which type of neck and cap?John Vine has a copy of the related Workshop Notice.Jonathan Link to comment Share on other sites More sharing options...
John Vine Posted February 14, 2016 Share Posted February 14, 2016 WN371 on its way, Roger.JV Link to comment Share on other sites More sharing options...
ECR Posted February 14, 2016 Author Share Posted February 14, 2016 Thanks JohnCant seem to find the fuel tank breather valve part No. WLV 10001 at the Caterham online store.Anyone know the supplier ? Link to comment Share on other sites More sharing options...
SM25T Posted February 14, 2016 Share Posted February 14, 2016 Just search on line for one way valve ...... to suit 8mm bore hose Link to comment Share on other sites More sharing options...
ECR Posted February 14, 2016 Author Share Posted February 14, 2016 I'm not clear if an ordinary one way valve is the answer. Sure it will let air in and prevent fuel leaking out but how does it cope with increased tank pressure (car driving in high heat on circuits .... )?Is this a real or imaginary problem ?Is the Caterham valve a simple one way valve .... ? Link to comment Share on other sites More sharing options...
SM25T Posted February 14, 2016 Share Posted February 14, 2016 It's a one way valve. Doesn't vent pressure. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted February 14, 2016 Share Posted February 14, 2016 The cap should be vented? Link to comment Share on other sites More sharing options...
ECR Posted February 14, 2016 Author Share Posted February 14, 2016 Yes, it currently is but I get fuel marking on the rear of the car and I think its coming through the hole in the Newton cap. I want to try blocking it off .... Link to comment Share on other sites More sharing options...
SM25T Posted February 15, 2016 Share Posted February 15, 2016 On my fuel filler it gets past the seal/sealing face on the neck. Solve this by adding a thin layer between the cap and the seal. Link to comment Share on other sites More sharing options...
Slipper man Posted February 15, 2016 Share Posted February 15, 2016 Why don't you run the breather pipe up the roll cage like mine? U bend at the top of course to stop water ingress Link to comment Share on other sites More sharing options...
ECR Posted February 15, 2016 Author Share Posted February 15, 2016 What happens if your car inverts or rolls on its side ? (not that I wish it on you ...... Link to comment Share on other sites More sharing options...
Gloucestershire AR Posted February 16, 2016 Share Posted February 16, 2016 My filler cap is within the boot (directly on top of the tank, so no external cap) and I run a hose from the tank to a one way valve and then more hose and the lot sits just under the top tube at the rear of the car below the boot cover. The theory is it lets air in but not petrol out. It's not knocked about by anything in the boot and seems a neatish solution. No hissing noises on refilling either so don't think the tank gets pressurised. Have I missed anything?Andy Link to comment Share on other sites More sharing options...
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