Andrew Posted April 4, 2021 Report Share Posted April 4, 2021 Hi I have replaced all my rubber hoses on the fuel system. Flexible to carbs, tank to pump where there are rubber hoses. The rubber bit in the boot tank to copper pipe is this a different diameter. andrew Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 4, 2021 Report Share Posted April 4, 2021 think on earlier post that the dip tube is 1/4" but im sure the Herald is 1/4 all the way do check the reserve lever dip tube sleeve nut is lightly nipped up it is just a pipe nut and olive , some have a rubber olive easy to make from a small slice of fuel hose but to remove the tube im afraid its tank out, hopefully all is well here and thats not a need Pete Link to comment Share on other sites More sharing options...
PeteH Posted April 4, 2021 Report Share Posted April 4, 2021 18 minutes ago, Pete Lewis said: but im sure the Herald is 1/4 all the way I hope not. I replaced mine (`71- 13/60) with 8?mm copper. It apeared to be the nearest to the existing Corroded steel pipe which was removed. Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 4, 2021 Report Share Posted April 4, 2021 As long as it fits and seals at the end, no problem. A replacement for the rubber seal / grommet, if you need one, is to put petrol-resistant rubber sealant around the pipe at the point the rubber grommet would rest at; then you can either shape it when soft or wait till it hardens and then smooth to shape. When the pipe is replaced and tightened it should conform to the contours and grip the pipe in the same way as the original seal would. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 4, 2021 Report Share Posted April 4, 2021 well there is two pipe sizes not always model defined its measure and check either 1/4" or 5/16" metric wasnt invented back then and who know whats been fitted in rebuilds over the years my 64 Vit6 was 5/16 all the way but some say that was wrong !!! the main thing is if you reduce the number of connections it improves the reliability , less chance of leaks plastic all the way has these advantages Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 4, 2021 Report Share Posted April 4, 2021 2 hours ago, Pete Lewis said: plastic all the way has these advantages Pete All depends on the plastic... that's NOT one of mine by the way. Link to comment Share on other sites More sharing options...
Andrew Posted April 4, 2021 Author Report Share Posted April 4, 2021 Hi all found out that the standard pipe width in the tank is 5/16 which was standard on all Heralds. Then the rest of the pipe work is 1/4 work that one out. Have you ever tried getting 1/4 rubber tube on a 5/16 pipe. Not easy Andrew Link to comment Share on other sites More sharing options...
Andrew Posted April 4, 2021 Author Report Share Posted April 4, 2021 PS mine is a 1971 Herald 13/60 convertible Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 5, 2021 Report Share Posted April 5, 2021 8 hours ago, Andrew said: Have you ever tried getting 1/4 rubber tube on a 5/16 pipe. Not easy Tell me about it! I've got 1/4" coming out the tank and 5/16" from the rear wheel arch onwards. Why did they do this?!!! I boiled the 1/4" rubber joint and covered it in copious amounts of olive oil. Delicious! Doug Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 5, 2021 Report Share Posted April 5, 2021 getting 1/4 hose on a 5/15 pipe is a magic way to breed rubber slivers !!!!! unless the orig was a duel ended hose i have no idea why this developed ive not looked but there could be a CH micro bore reducer union from 6 to 8 mm or whatever pete Link to comment Share on other sites More sharing options...
PeteH Posted April 5, 2021 Report Share Posted April 5, 2021 Was it possible? that the Vittesse has/had larger pipework working on the theory that it`s fuel demand would be greater. And over the year(s) some of that has become "Shared" with the Smaller Engines.? Eg; Are "new" (repro) Tanks made "One size fits all". ? Pete Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 5, 2021 Report Share Posted April 5, 2021 18 minutes ago, PeteH said: Was it possible? that the Vittesse has/had larger pipework working on the theory that it`s fuel demand would be greater Yes I think that's right, GT6 also has larger pipes, but sticking to the plan started to deteriorate in the factory. Which is why my GT6 has 1/4" tank and 5/6" pipework, it was more a question of "Hmm, what have we got in the stores?" "Shifting the parts" resulted in the GT6 February '73 upgrade with only 6/7 months of production left. Or am I being cynical? But, more importantly does 1/4" into 5/16" cause a problem? Well, no. Doug Link to comment Share on other sites More sharing options...
Dick Twitchen Posted April 5, 2021 Report Share Posted April 5, 2021 5 minutes ago, dougbgt6 said: GT6 also has larger pipes IIRC GT6 Mk1 was 1/4" throughout, well mine was originally. Changed to 5/16" at the same time as the Vitesse Mk2/GT6 mk2. Dick Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 5, 2021 Report Share Posted April 5, 2021 feeding two thirsty strombergs down a1/4" pipe sounds a bit limited maybe the bhp increases over the years were purely down to 5/16 pipework now there's a thought !!!! Pete Link to comment Share on other sites More sharing options...
Andrew Posted April 5, 2021 Author Report Share Posted April 5, 2021 I have now replaced the 5/16 hose in the boot from the tank to the 1/4 inch petrol line. Just need to make sure you fully tighten the hose over the 1/4 pipe. Went out for a. 10 mile drive and all ok Link to comment Share on other sites More sharing options...
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