antanol_1238

Pete, is correct the problem was the interface gasket between the carb and K&N filter. Originaly there wasn't a gasket so the carb breathed between the carb and filter. I put in a home made cork gasket because No 2 carb has wider lugs where the mounting bolts to the filter go through the filter the heads hold it off the carb body, gaskets supplied are too thin. Unfortunately I made the gasket to match the filter back plate, it had the holes in the wrong place!!!!!! . Thanks Pete for your efforts all is now well.

Unfortunately Pete I am in France at the moment and specialist assistance out here is very limited, like I said I spent quite a while talking to a Mr Phil Whitlock at Zenith/ Stromberg and he couldn't help. I will willingly phone you to discuss the problem if that is OK with you, your number is in the Courier. The main problem as I see it is how does the float chamber vent when the fuel level is above the hole in the jet adjuster and the needle valve is still open. Regards Tony.

actually the washer is too high and couldn't suck fuel in, however after lengthy discussion with Zenith/Stromberg I have reverted to the original settings and guess what yes it still floods.Everything is clean and as standard I can't believe I am the only person to have experienced this..Must try harder.

Thanks everyone for your input I tried everything to no avail and the system was set up to the book, I even spoke to Rimmer Bros and Zenith technical, who were unable to help. A little bit of thought (sat in the garage like the thinker) and it was obvious that the air in the carb float chamber wasn't able to be expelled when the petrol level was higher than the holes in the orifice adjusting screw.therefor pressurising the float chamber. It would normally get out via the top of the jet and the carb body but mine had become airtight, not a very good system! Making a very fine cut in the aluminium washer on the upper face worked.I now have another problem the engine won't start but it has nothing to do with the modification. Here we go again.

I had a new gasket in the kit which appeared to fit ok but have just obtained another new one from SC spares which resembles the old one exactly. It still floods. Bit more head scratching. Thanks for taking an interest. Tony

Thanks for all that Pete, but it does it with just gravity pressure.Yesterday I assembled the float chamber with about a 3mm gap and no gasket and introduced fuel watching through the gap with a very bright led light. when I saw the float rising I kept a check on fuel flow and eventually the needle valve closed without over flow, I then closed the gap and put 2 screws in it wouldn't take any more fuel and didn't flood. So then I reassembled the carb with a gasket and once more it flooded. I know it sounds crazy but I have ordered 2 new gaskets I don't know why it should work but watch this space. Tony

Yes Pete done that even just inverting the carb when empty and assembled closes the valve and when you tip it back up it opens.Somehow or other the valve is just not being closed when filling with fuel. I am going to have another session in the garage today. Cheers

Hi Pete. yes I have tried new valves and the lines have been flushed also I have tried it on the bench with fuel fed from a hyperdermic syringe so fuel pressure isn't the answer. I am getting lots of splinters under my fingernails, just glad it isn't the weather for enjoying the car.

Thanks for that Pete the American article was very informative even though the jetting is totally different. the only thing it mentions different to the workshop manual is that you should keep the float tag at 90 degrees to the valve pin. This I have done to no avail. As stated all seals etc. have been renewed they are O rings and cannot go in the wrong way, but it is the fuel valve that is not shuting off, and this is on both carbs.It's got me baffled there is obviously something simple that I just can't see, I know use SU.'s

The carbs in question are on a Vitesse 2 Ltr. Mk 2. Until recently I have not had any trouble with carburation other than it has been running rich so I decided to strip and rebuild the carbs. I have changed all the seals, gaskets, cleaned out the fuel lines, float chambers and needle valve.The carbs were rebuilt as per service manual with the correct float setting and on refitting fuel poured out of the carbs as soon as I started the pump working. I have stripped and checked everything at least 6 times and even when set up on the bench and gravity fed the fuel just floods up the needle jet. With the carb empty I have turned it upside down and tried to blow down the filler pipe and the float works perfectly, but it won't work when correctly set up. Anyone got any ideas other than increasing the float level height. Tony Birkbeck