Liquid on manifold

[Tipidave]

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? 

[Nick Jones]

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.

[Pete Lewis]

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

[Tipidave]

Thanks for the replies .... I will be on the phone in the morning ... let's hope I can get hold of the parts😀😀

[Pete Lewis]

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

[Colin Lindsay]

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!

[johny]

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....