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Re: Oil Pressure Sensors Thread size

To: spitfires@autox.team.net
Subject: Re: Oil Pressure Sensors Thread size
From: "Terry L. Thompson" <tlt@digex.net>
Date: Wed, 08 Mar 2000 14:05:45 -0500
I purchased a Mk IV die cast model spitfire for my desk at work. 
(they evidently don't make the Spit1500 model)

I came in this morning and someone had set a piece of paper 
underneath and drawn a big black dot on it, with an arrow
along with the words "Authentic Oil Leak".

I told the guy that did it, it was a good assertation of most British made
vehicles, and that it made me laugh.....then I fired him.

Further Notes on OPS's. I found a few companies on the web that sell
smiths gauges (oil pressure and temp) as well as sensors and T-fittings (so
you can add your gauge and keep the warning light as well).
But they don't say "This will fit your Spitfire 1500 block", instead they give
you a Sensor and it's thread size, or the T-fitting and it's 3 thread sizes (
block end, the sensor end, and the hose end [for mech pressure guages]) etc.

Does anyone know what the thread size and type (NPT, BSF, etc.) is on the
Spitfire oil pressure inlet on the block? Anyone got their
bentley/haynes/workshop
manual with them?

Just for everyone's edification: 
NPT = National Pipe Thread (U.S. standard meets ANSI/ASME B1.20.1-1983
specified
by most US manufacturers)
BSW = British Standard Whitworth System (Euro/australian standard screw
thread)
BSF = British Standard Fine (Euro/australian tapered fine thread)
BSP = British Standard Pipe (European and Australian Pipe thread)



At 12:31 PM 3/8/00 EST, you wrote:
>
>If you get an electric gauge you will need another sending unit, the one for 
>the light wont work, its just an on/off. You need a sending unit that
changes 
>resistance with changes in pressure and its range needs to be matched to the 
>gauge.
>I have a temporary unit that is mechanical that I stripped from a 76 midget.
>It works well but the other half of the gauge that shows temperature is not 
>working because the mechanical line to it is broken.
>
>

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