Piglet Posted May 12, 2022 Report Share Posted May 12, 2022 My car is missing this! Rimmer Bros lists 2, vented and non-vented. Any ideas how I know which one to order. I'd assume vented but would like to make sure! Alex Link to comment Share on other sites More sharing options...
NonMember Posted May 12, 2022 Report Share Posted May 12, 2022 For a UK-spec Mk3 with the outlet on the bottom of the tank and no pipes at the top (other than the filler neck) then you need to vented one. The Mk4 tank had the outlet moved to the top and also acquired a vent pipe (for the US market emission canister). With that spec of tank you want the non-vented, unless the breather pipe has been blocked. Link to comment Share on other sites More sharing options...
Piglet Posted May 12, 2022 Author Report Share Posted May 12, 2022 Thanks for that! Nice to have it clarified. Alex Link to comment Share on other sites More sharing options...
DanMi Posted May 12, 2022 Report Share Posted May 12, 2022 check them out both the vented and non vented are for the mk4 filler cap not the mk3 the mk3 is a simple circle Link to comment Share on other sites More sharing options...
DanMi Posted May 12, 2022 Report Share Posted May 12, 2022 looking in the mk2 parts catalogue there is no part number listed for the seal. I believe it is a circular bit of cork Link to comment Share on other sites More sharing options...
NonMember Posted May 13, 2022 Report Share Posted May 13, 2022 9 hours ago, DanMi said: check them out both the vented and non vented are for the mk4 filler cap not the mk3 the mk3 is a simple circle Yes, sorry, I hadn't checked the Rimmers reference. My Mk3 filler cap also has NO SEAL and works fine. The Mk4 cap is slightly different and would have been vented on some (UK?) models but non-vented on others, particularly US. The Mk3 cap does have provision for something - there's a distinct recess on the neck, into which the lip of the cap fits - but it would be a porous cork ring fitted to the neck, not the cap. However, if you have a Mk4 cap on a Mk3 tank, you definitely need the vented version. Link to comment Share on other sites More sharing options...
thescrapman Posted May 13, 2022 Report Share Posted May 13, 2022 A brake calipers seal does an excellent job in a Mk3 filler cap. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 13, 2022 Report Share Posted May 13, 2022 Is that the same design as the early GT6 filler cap? Mine had no seal, I bought one, couldn't even work out how to fit it... it's still in the spares pile. Link to comment Share on other sites More sharing options...
DanMi Posted May 13, 2022 Report Share Posted May 13, 2022 5 hours ago, thescrapman said: A brake calipers seal does an excellent job in a Mk3 filler cap. for which calliper? type 12, 14 or 16 I guess 14 Link to comment Share on other sites More sharing options...
Piglet Posted May 13, 2022 Author Report Share Posted May 13, 2022 It looks simple enough to fit. Take off the tiny circlip in the fuel cap (covering fuel tank hole!) dismantle, put in seal and fit everything back together. I hope. Alex Link to comment Share on other sites More sharing options...
thescrapman Posted May 13, 2022 Report Share Posted May 13, 2022 The seal goes into the neck, the lid has a sprung metal cap in it that pushes down on rubber seal. Think it is typen16. Might be a 2000 size Lockheed one, Link to comment Share on other sites More sharing options...
Piglet Posted May 13, 2022 Author Report Share Posted May 13, 2022 Hmm. I may have ordered the wrong thing. Alex Link to comment Share on other sites More sharing options...
Piglet Posted May 14, 2022 Author Report Share Posted May 14, 2022 Is there anything missing here? Link to comment Share on other sites More sharing options...
Josef Posted May 14, 2022 Report Share Posted May 14, 2022 1 hour ago, Piglet said: Is there anything missing here? If so, I’ve not got one either! (Bloody rapeseed pollen is making a mess of my shiny paint as you can see…) Link to comment Share on other sites More sharing options...
Piglet Posted May 14, 2022 Author Report Share Posted May 14, 2022 Thanks for reassuring me. I can fill her up now! And take out a second mortgage while I'm at it... Alex Link to comment Share on other sites More sharing options...
NonMember Posted May 14, 2022 Report Share Posted May 14, 2022 2 hours ago, Piglet said: Is there anything missing here? No, that's correct for a Mk3 Link to comment Share on other sites More sharing options...
Piglet Posted May 14, 2022 Author Report Share Posted May 14, 2022 Wonder why the previous owner thought it was missing a seal. Hey ho! Alex Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 15, 2022 Report Share Posted May 15, 2022 Well, it's possibly meant to have one of these: Which is what I bought for my own GT6 Mk1 but could never work out how it was meant to fit, so it's still in the drawer. It goes on like this: The one referred to earlier as being the same as the caliper seal looks like this one: It probably just goes round the edge of the cap centre. Link to comment Share on other sites More sharing options...
Peter Truman Posted May 15, 2022 Report Share Posted May 15, 2022 On the daughters Mk2 Spitfire I used a big dia thick O ring in the recess on the main body of the cap seems to work OK Link to comment Share on other sites More sharing options...
NonMember Posted May 15, 2022 Report Share Posted May 15, 2022 4 hours ago, Colin Lindsay said: Well, it's possibly meant to have one of these: No, that's the later type. Your second photo shows a flat face on the neck, which roundtail Spitfires don't have. The seal, such as it is, goes on the neck, not the cap. Link to comment Share on other sites More sharing options...
Josef Posted May 15, 2022 Report Share Posted May 15, 2022 I would’ve thought the seal, such that it is, is the red ring visible in both mine and Alex’s photos. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 15, 2022 Report Share Posted May 15, 2022 2 hours ago, NonMember said: No, that's the later type. Your second photo shows a flat face on the neck, which roundtail Spitfires don't have. The seal, such as it is, goes on the neck, not the cap. Yep; that's why I added 'possibly'... I wasn't sure what the Mk3 used. Link to comment Share on other sites More sharing options...
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