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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG ZR ZS ZT Technical - Temp. Gauge for '59 ZB

For those with a bum sending unit, replacement senders are both extreemly rare and expnsive. As an alternative, you can use a series resistor of about 44 ohms which will produce a reading between the normal and high bars at normal temperature, when used with a late MGB sending unit (plentiful and only $8 + change apiece). Pay attention to the wattage rating of the resistor, as it will be dissipating about 1/4 W under normal conditions, much more under over-heating conditions, and will be operating in an elevated ambient. Now the BIG question, why settle for this?! Because it's extreemly EASY and gets you essentially all the info as a properly functioning gauge. NOTE HOWEVER that in this mode, the indication is reversed, so it starts out indicating full hot (as when stopped BTW) and will tend toward cold as it heats up. A slightly lower series resistance will have you in the N bar under normal conditions. I rejected this because, I only had a 44 ohm resistor of sufficient wattage, a reading between the N and H bars is just as easy to see, and draws less current which could be a factor for the MGB sender. Since the gauge isn't callibrated anyway, I like this system.
Steve Giannoni

Wrong section of forum Steve, Magnette's are further down the board... you beed to repost if you want it to be seen!
Kelvin

Yeah, thanks, and it should be a bit lesss than 44 ohms for any who might be looking ....
S.G. Giannoni

This thread was discussed on 12/11/2004

MG ZR ZS ZT Technical index

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