more leaks this time carburettor

[Charles_Shiplee@batesuk.com]

Thanks to all those who have replied to my concerns over oil leakage. First stop will be to let the oil continue to leak to see if its just a case of the existing seal dried out, then I'll drop the sump to replace the seal and gasket and finally its the dreaded lip seal. Now on to another leak. When I stop the engine, ignition off so no fuel pump priming, fuel continues to flow in the front carbie. If I shine a torch down the open air inlet then I can see fuel welling up around the needle and flowing back down the throat toward the manifold inlet. When I try to start the engine it is flooded. I thought that there may be a seal gone in the carbie. Does anyone else have a similar experience? Charles IMPORTANT NOTICE: This message is intended for the use of the person(s) or organisation (the Intended Recipient) to whom it is addressed. It may contain information which is privileged and confidential within the meaning of applicable law. Accordingly dissemination, distribution, copying or other use of this message or any of its contents by any person other than the Intended Recipient may constitute a breach of civil or criminal law and is strictly prohibited. If you are not the Intended Recipient please contact the sender as soon as possible. All information or opinions expressed in this message and/or any attachments are those of the author and are not necessarily those of The Group. All reasonable precautions have been taken to ensure no viruses are present in this E-mail. As The Group accepts no responsibility for loss or damage arising from the use of this E-mail or attachments we recommend that you subject these to your virus checking procedures prior to use.

[Skip Kelsey]

Charles: You either have a stuck, or malfunctioning float needle, or the float has taken on fuel thru a hole in the float, causing it to sink. Skip Kelsey.......................... At 06:14 AM 4/26/01, Charles_Shiplee@batesuk.com wrote:

>Thanks to all those who have replied to my concerns over oil leakage. First >stop will be to let the oil continue to leak to see if its just a case of >the existing seal dried out, then I'll drop the sump to replace the seal >and gasket and finally its the dreaded lip seal. > >Now on to another leak. > >When I stop the engine, ignition off so no fuel pump priming, fuel >continues to flow in the front carbie. If I shine a torch down the open air >inlet then I can see fuel welling up around the needle and flowing back >down the throat toward the manifold inlet. When I try to start the engine >it is flooded. >I thought that there may be a seal gone in the carbie. Does anyone else >have a similar experience? > > >Charles > >IMPORTANT NOTICE: >This message is intended for the use of the person(s) or organisation (the >Intended Recipient) to whom it is addressed. It may contain information >which is privileged and confidential within the meaning of applicable law. >Accordingly dissemination, distribution, copying or other use of this >message or any of its contents by any person other than the Intended >Recipient may constitute a breach of civil or criminal law and is strictly >prohibited. If you are not the Intended Recipient please contact the sender >as soon as possible. All information or opinions expressed in this message >and/or any attachments are those of the author and are not necessarily >those of The Group. All reasonable precautions have been taken to ensure no >viruses are present in this E-mail. As The Group accepts no responsibility >for loss or damage arising from the use of this E-mail or attachments we >recommend that you subject these to your virus checking procedures prior to >use. > > > > > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

[CFritz7001@aol.com]

Charles, Sounds to me as though you have four possible problems, or some cobination thereof:. 1) Fuel level too high in front carb [check & adjust lever inside float bowl] 2) Fuel shut-off needle valve in front carb is not working properly [replace it] 3) Radiated heat from exhaust manifold is percolating fuel from bowl into carb. [Make a heat shield out of thin aluminum to fit between carbs & intake manifold. Cover shield's back side with insulation if you can find some] 4) Heat being conducted from the manifold to the carb; percolation again. [Install thicker, non-metallic insulating gaskets between carbs and intake manifold] *************** BTW, you can fine-adjust the actual fuel level at the jet-head somply by pivoting the float bowl around its mounting bolt. Pivoting the bowl TOWARDS the engine LOWERS the fuel level at the jet; AWAY from the engine RAISES the fuel level at the jet. (Make sure the bowl-mounting bolt is snug after doing any pivoting of the bowl, or you'll likely have a fuel leak there) Hope this helps. I have had all of these problems in the past, but no longer since taking thesteps outlined above. Regards, Carl Fritz Gainesville, FL

[joecurto@aol.com]

Charles probably a bad needle and seat possible bad float. Check this out as if you do this long enough you will wash down the cylinder walls, and prematurely wear them out and them you will get to rebore the engine and correct that oil leak at the same time. Joe curto PS set float level to 7/16 not 3/8 as old books say.

[Gates Family]

I have experienced a similar problem. I think gravity contributes from fuel pump down feed line, and if the front carb float damper is set too high and/or the float (not jet) needle is not seated properley, they cause a "post nasal drip" that floods the inlet manifold. Regards Joe Gates TC8675

[Chase, Jim]

Charles The fuel level in the float chambers should be below the level of the jet in the carburetor throat. Fuel should only flow through the jet when the engine is running and air is being drawn though the carburetors. This points to your problem being caused by too high a fuel level in the float chambers. Possibly a punctured or badly adjusted float. Many years ago I managed to flood the engine of my TC to the extent where the crank wouldn't turn. This was after parking the car over night facing down a very steep slope. The fuel level in the tank was higher than the carburetors causing fuel seepage through the valves in the pump and the float needle valves and filling the cylinders. If your car is parked on a very steep slope it might be a good idea to ensure that it faces up the slope. Regards, Jim Chase TC 5090

[Paul Huck]

Other leaks also. Before I found the time to rebuild my rear wheel cylinders, if I parked on a hill, facing downhill (as in front of my house) air seeped into the rear wheel cylinders, requiring a bleeding of the brakes. The master cylinder is higher than the wheel cylinders, but not on a hill. As long as I parked with the read down hill, the brake fluid sealed the tiny leak. Front was never a problem. Anyway. fixed now. Paul Huck

----- Original Message ----- From: Chase, Jim Jim.Chase@fuelsubsea.com> To: Charles_Shiplee@batesuk.com>; mg-tabc@yahoogroups.com> Sent: Friday, April 27, 2001 4:38 AM Subject: Re: [mg-tabc] more leaks this time carburettor > Charles > > The fuel level in the float chambers should be below the level of the jet in > the carburetor throat. Fuel should only flow through the jet when the engine > is running and air is being drawn though the carburetors. This points to > your problem being caused by too high a fuel level in the float chambers. > Possibly a punctured or badly adjusted float. > > Many years ago I managed to flood the engine of my TC to the extent where > the crank wouldn't turn. This was after parking the car over night facing > down a very steep slope. The fuel level in the tank was higher than the > carburetors causing fuel seepage through the valves in the pump and the > float needle valves and filling the cylinders. > > If your car is parked on a very steep slope it might be a good idea to > ensure that it faces up the slope. > > Regards, > > Jim Chase TC 5090 > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > >

[Zissel-Kreuztal@t-online.de]

Hi Charles, hi T-Typers! My carbs are lost petrol, when the overflow pipes are blocked. The heat of the engine let the petrol boil --> the pressure can t pass the engineered way --> fuel welling up around the needle. Greetings lozi (TC3762) Charles_Shiplee@batesuk.com schrieb:

> Thanks to all those who have replied to my concerns over oil leakage. First > stop will be to let the oil continue to leak to see if its just a case of > the existing seal dried out, then I'll drop the sump to replace the seal > and gasket and finally its the dreaded lip seal. > > Now on to another leak. > > When I stop the engine, ignition off so no fuel pump priming, fuel > continues to flow in the front carbie. If I shine a torch down the open air > inlet then I can see fuel welling up around the needle and flowing back > down the throat toward the manifold inlet. When I try to start the engine > it is flooded. > I thought that there may be a seal gone in the carbie. Does anyone else > have a similar experience? > > Charles > > IMPORTANT NOTICE: > This message is intended for the use of the person(s) or organisation (the > Intended Recipient) to whom it is addressed. It may contain information > which is privileged and confidential within the meaning of applicable law. > Accordingly dissemination, distribution, copying or other use of this > message or any of its contents by any person other than the Intended > Recipient may constitute a breach of civil or criminal law and is strictly > prohibited. If you are not the Intended Recipient please contact the sender > as soon as possible. All information or opinions expressed in this message > and/or any attachments are those of the author and are not necessarily > those of The Group. All reasonable precautions have been taken to ensure no > viruses are present in this E-mail. As The Group accepts no responsibility > for loss or damage arising from the use of this E-mail or attachments we > recommend that you subject these to your virus checking procedures prior to > use. > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

[joecurto@aol.com]

The overflow pipes should not be blocked, this is how the float chamber vents (along with the feared Tickler Pin) If you block overflows than the engine will fill up with gasoline. Change the float needles, check for bad floats but whatever you do check it out. Joe Curto

[C. Knight]

joecurto@aol.com wrote:

> > The overflow pipes should not be blocked, this is how the float > chamber vents

The original long vent pipes can also syphon petrol out of the carbs if the valves are leaking and the air vents are blocked. Ensure that the vent at the top of the float chamber is working and fitted with the correct serrated fibre washer to provide the atmospheric venting. SU abandoned the long tubes because of this problem and used short vent pipes later in the 1950s. Regards Cliff