Bob,
You can dip a thermometer into the top tank of the '71 MGB also. It
may not be as accurate as testing in the TD, but will be close enough to
tell you what you need to know about radiator temp and the gauge.
Is the fuel gauge reading accurately or as accurately as it ever has?
Since both it and the temp gauge are regulated by the line voltage
stabiliser, if both are reading strangely you can suspect the LVS.
I suppose you could rig up a pan to contain boiling water and wire it
to the car in order to test the temp sending unit, but replacing the
suspect sender would be a much easier way to approach the challenge.
Bob
On Fri, 16 Dec 2005 11:00:39 -0500 "Bob Donahue" <bobmgtd@insightbb.com>
writes:
> I'm starting to think my cold engine isn't really that cold. As I
> mentioned,
> I covered my radiator completely. Yesterday I took a 50 mile trip in
> 32
> degree F weather. The temperature gauge stayed just above the 'N'
> the whole
> way. After I parked a plum of steam billowed from under the hood.
> Fortunately, it was coming from the overflow hose, not a leak. I'm
> thinking
> this behavior shouldn't happen with the needle only a smidge above
> 'N'. How
> can I check the calibration of my temperature gauge? (It's easy on
> the TD
> since you can remove the cap any time, and stick a thermometer in.)
>
> Bob Donahue (Still Stuck in the '50s)
> Email - bobmgtd@insightbb.com
> Cars: 52 MGTD - #17639
> 71 MGB - #GHN5UB254361
> Member: NEMGTR #11470
> NAMGBR # 7-3336
> Hoosier MGB Club
> Olde Octagons of Indiana
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