Demon James wrote:I stripped down my Eddy carb this morn and found a paper thin ally disc rattling around in one of the float chambers,
Common fault with mass produced castings these days. Individual parts are not inspected well enough before assembly. Everything is made as fast and as cheap as possible. I have taken apart, cleaned, inspected and rebuilt every carb I ever fitted to any of my cars since 1982.
But I also found quite a bit of sandy type stuff in the chamber oppposite the pre-pump chamber,
Again common. That is where the dirt that gets through the filter collects. Shows how good your filter is. But it could also be sand from the casting when new if the bits are as big as sand.
The clear see-through filters are considered dangerous as apparently they can fracture. Never seen one do it myself though.
Any how, enough babling, what I really wanted to know is what does the small brass coloured disc do (picture with my hand in) as one of them had fallen out and was just resting in the gap (picture of the carb).
It is a type of core plug I expect. Like the core plugs on your engine block that people mistakenly think are there for protection against freezing (and call them freeze plugs) when in fact the holes are needed for the casting process.
I put it back in but cant see how its fixed, now I've gently pushed it back it wont come out even tapping it so I'm guessing it will hold?
They are supposed to be a tight pressed fit. The carb will not work correctly with it out so make sure it is in there for good. Stake the opening around it in a few places to make sure it stays there.
Also, one of the stubby needle/valves that open when the float drops was stuck up, is this also under pressure during normal use and therefore could have been working ok? I polished the sides of this needle and it now falls every time just like the other side.
It was stuck and needs to move up and down freely for correct operation. You did the right thing.
Having never taken a carb appart before I dont really know what to expect.
