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September 29th, 2008

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Q & A: 1952 MGTD Fuel Warning Light

Thursday March 27th, 2003
Q & A, MGA, MGB, MGC, MG T-Type, Midget
John,

I hope you can take the time to answer a technical question for me. I have
a 1952 MGTD that has a problem with the fuel warning light. I removed the
float switch from the gas tank and found it to be froze-up. It had the
original cork type gaskets. I opened up the housing and found some old gas
with varnish smell inside. I have removed the rubber and insulator
material
and soaked it in carburetor cleaner. The mechanism now works OK. I bought
a
gasket set from Moss Motors. The gaskets are made of a rubber-like
material.

My question is this. Should there be some kind of oil or something inside?
If I close up the unit with air inside, will gas leak inside the unit and
if it does, will that cause an explosion when the electrical contact is
made? None of my books say anything about the switch/sending unit.

Thanks in advance,

Dave Parker

Dave!

I have never seen a fuel sending unit explode, nor have I ever heard
of one catching fire -- not in 30 years in the trade, so it must not occur.
It may be that the air/fuel mixture is too heavily fuel s... read more