MGDAVE@aol.com wrote:
>
> Actually, there is not a sender. The oil itself comes out a flex hose behind
> the distributor, goes through a pressure switch (which opens the anti-run-on
> when engine is switched off, and keeps it open until oil pressure drops). The
> oil line then disappears under the heater box and snakes its way to the
> mechanical guage in the center of the instrument panel.
>
> 1.) The oil line could be plugged.
> 2.) The guage could be bad.
> 3.) Most likely, the oil line has gotten air in it (due to oil leaking out of
> the disconnected oil line)
>
> It's messy as hell, but with engine idling, loosen the fitting on the back of
> the gauge and let a little oil through to displace air.
Ahh, yes maybe with the later model this is all true, but I have the
electrical unit which was installed up through 1971. There is an
electro-mechanical sender at the end of that braided hose from behind
the distributor. Out of it comes a white/brown wire that runs directly
to the electrical oil pressure gauge. The strictly mechanical units
with the oil lines running to the dash came along in the following year.
Wally / 71 MGB
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