I'm not happy!
The Smiths Classic Water Temp gauge I chose is not compatible with the BMW VDO sender in the cylinder head. Caerbont (the manufacturer of Smiths gauges) advised I would have to use one of their senders for it to register correctly. I bought one, and after spending several hours adapting it to fit into my cylinder head, I decided to test its callibration.
According to Caerbont, water now boils at 135 degrees C!
............and it is consistently out across the scale.
True 90 reads 125deg C
true 80 reads 110
true 70 reads 85
true 60 reads 75
below that it is not worth using the gauge (......or at any temp based on above!!!)
Do any of you auto electrician bods have any suggestions?