Tipidave Posted February 13, 2019 Report Share Posted February 13, 2019 So... the new head is on and the car is running like a Japanese sewing machine... happy days. But... have just noticed a small trickle of liquid emerging from a hole on the manifold. My question is what is the hole for? Is something missing ? And what is the liquid? Link to comment Share on other sites More sharing options...
Nick Jones Posted February 13, 2019 Report Share Posted February 13, 2019 That is the anti-flooding hole that drains excess fuel from the inlet manifold. It should have a little metal pipe in it (3/16" or even a bit less) held in with a small compression fitting to direct the fuel away from the hot manifold. It looks a little..... err..... "productive" at present. Could just be the float chamber overflowing into the carb throat due to fuel warming and expanding after switching off and may indicate the float level is a little high. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 13, 2019 Report Share Posted February 13, 2019 Thats is the manifold drain tube should havea a pipe fitted with a small calibrated hole to drain off excess fuel when on choke With a open hole it will really mess up the idle mixture Eg item 15 https://www.canleyclassics.com/triumph-herald-1200-oil-pump-and-manifold Pete Link to comment Share on other sites More sharing options...
Tipidave Posted February 13, 2019 Author Report Share Posted February 13, 2019 Thanks for the replies .... I will be on the phone in the morning ... let's hope I can get hold of the parts😀😀 Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 14, 2019 Report Share Posted February 14, 2019 make one from 3/16 brake pipe , suggest you squeeze the end to reduce air intake but still allows a dribble of fuel out something like a 2mm hole idea crimp base of tube drill small hole in the side Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 14, 2019 Report Share Posted February 14, 2019 2 hours ago, Pete Lewis said: make one from 3/16 brake pipe Pete You just beat me to it... photos available if you want to see what one looks like! Link to comment Share on other sites More sharing options...
johny Posted February 14, 2019 Report Share Posted February 14, 2019 Somebody on another well know site has been running with a bolt in the drain hole with no problems. I think the drain was necessary as this inlet manifold isnt water heated and with a downdraught carb on cold mornings a considerable amount of fuel could condense out before the manifold warmed up sufficiently. Now that our cars tend to avoid cold weather its not such a problem.... Link to comment Share on other sites More sharing options...
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