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MG MGB Technical - Temp Gauge

Whilst swapping the engine on my '75 I broke the temp sender wire which is the mercury tube type. With a replacement having to include a new gauge, it costs circa £50. As I already have an electric sender an electric replacement gauge would be much cheaper in the interim.

Is it a simple process to connect/wire one and would any electric temp gauge do for the time being ?

Thanks in advance

Dave G
Dave G

Depending on the gauge, you may or may not have to connect it to the voltage stabilizer.
For gauges that don't need the voltage stabilizer, just branch off on the green wire that goes to the voltage stabilizer.
For gauges that need the voltage stabilizer, branch off on the lightgreen/green wire that goes to the voltage stabilizer. Then run a wire from the gauge to the temp sender.
Kimberly

You could always attempt a repair....


http://www.ply33.com/Repair/tempgauge

Dave O'Neill 2

Thanks guys
Dave O - unfortunately it broke at the sender and I think all the fluid is lost and therefore, after reading the link, it is not repairable.
Kimberley - that sounds easy I'll try that.
Kind regards
Dave G
Dave G

The gauge has to be matched to the sender or you will get high or low readings. As electric temp and fuel gauges are voltage and current sensitive you almost certainly *will* have to power the gauge off the light-green/green to get an accurate reading.
Paul Hunt 2

Dave G. - Youmiht want to contact Vintage restorations and see if they do MGB instrument repairs. They do an excellent job on the instruments for the T series cars, which use the same type of temperature gauge. Their web site is at: http://www.mgcars.org.uk/vr/index.html Cheers - Dave
David DuBois

Paul-

Not all gauges require an external voltage stabilizer. The VDO Cockpit Royal line is an example.
Since Dave didn't specify make and model of his replacement gauge, I mentioned two power sources, he will have to determine which source his gauge needs.
Kimberly

This thread was discussed between 03/08/2007 and 04/08/2007

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