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MG TD TF 1500 - SU fuel pump leak

I’m helping a friend work on her TD. It’s a MKII with two SU fuel pumps. The one on the right is leaking gas through the small vent hole in the pump body. ( # 27 in the W/S/M) I know no gas should be on this side of the diaphragm, but every 30 seconds or so a fine mist of gas is sprayed out of the breather hole(?) This just started after the carburetors were rebuilt and was not noted before. Is this a problem with the fuel pump on the right , on the left or the carburetors. What’s the fix. John
John C. Hambleton III

This sounds like a dangerous situation, especially since the points are sparking like crazy in that end of the pump. There's probably not enough oxygen in there to allow ignition, but I wouldn't risk it. Disassemble the pump, and check the diaphragm for leaks. Replace if necessary. Assembly is the reverse of disassembly, as Haynes always says.
Mark B.

This thread was discussed on 18/04/2005

MG TD TF 1500 index

This thread is from the archive. The Live MG TD TF 1500 BBS is active now.