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Hi all, I just had both carbs open. I couldn't see any obvious signs of them leaking, but then, I'm not really sure what I'm looking for. What I can say is this (i don't know how relevant all of this is, but anything could be a clue): Both needle valves are OK Both floats float. The manifold/carb gasket on the right hand side was quite wet. The fuel level in the left had carb was rather low when I opened it. The float was resting on the bottom of the bowl. The left hand carb's accelerator pump doesn't work. This is not because of a leaky diaphragm, though I changed it just in case. There is a hole next to the pipe through which the accelerator pump squirts petrol, which is supposed to have a brass insert of some kind inside it. This is missing. All the accelerator pump does is blow bubbles through this hole.While it may mean that I need to replace the bottom half of this carb, I don't see how it can be causing the leak. I replaced the gasket on the throttle base of the right carb. It was probably OK, but it was starting to fray a bit. What can actually cause a carb to leak gas into the cylinders? And how can I test the fuel pump? It's a knock-off Brazilian jobbie, BTW. Thanks for all your help, Daniel Baum 1969 Type 34 automatic http://www.qldesign.com/type34 > On 31 Dec 2002 at 19:00, Daniel Baum wrote: > > > Some time ago my right hand carburetor was leaking from the base. I > > tightened up a screw and the leak went away. It mostly leaked after the > > engine was switched off. Is it possible that the petrol that was leaking out > > the base is now leaking into the engine? Could this leak also explain why my > > right hand carb runs permanently rich? > > Yes & yes. > > > The only problem (as of now) with this theory is that the oil that I drained > > didn't smell of petrol. Someone with more experience than me would probably > > be able to tell just by looking at it. > > Used engine oil always smells of gas. If you didn't notice it, that probably > just means that the gas smell is so strong around your car that the oil was no > different. Another sign that something is running rich. > > > Finally, I noticed that there is a big tear in the rubber part of my oil > > filler tube. Does anybody have one? > > Yes. > > -- > ******************************* > Jim Adney, jadney@vwtype3.org > Madison, Wisconsin, USA > ******************************* > > > ------------------------------------------------ > To unsubscribe, E-mail to: <type3-off@vwtype3.org> > For more help, see http://vwtype3.org/list/ ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/