My temperature gauge does not return to 'zero' when left to go cold. The needle stays mid way between cold and normal. When run the gauge then climbs to midway between normal and hot. Engine doesn't seem to overheat so I suspect a gauge fault. Is it common, and is it a case of a new gauge and capillary tube?
1974 Roadster.
Temperature Gauge
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Vic Butler
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Re: Temperature Gauge
It would appear so. They're repairable but it needs someone who knows what they're doing to carry it out.
1977 Stage 2 MGB GT
1975 SWB Series 3 Land Rover with a later 2.5 petrol engine
1975 SWB Series 3 Land Rover with a later 2.5 petrol engine
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Peter Cresswell
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Re: Temperature Gauge
I assume it is the dual Oil Pressure/Water Temperature gauge made by Smiths?
For a repair, try Speedycables. They repair all Smiths gauges. See https://speedycables.com/instruments/ga ... nversions/
It might cost almost the same as buying a new dual gauge, which is currently around £124 - £130 inc vat from most of the main suppliers. Whatever you do check the cost of P&P and make sure the price you get quoted includes vat. Also there are many versions of the dual gauge so make sure you are getting the right one for the year of the car.
For a repair, try Speedycables. They repair all Smiths gauges. See https://speedycables.com/instruments/ga ... nversions/
It might cost almost the same as buying a new dual gauge, which is currently around £124 - £130 inc vat from most of the main suppliers. Whatever you do check the cost of P&P and make sure the price you get quoted includes vat. Also there are many versions of the dual gauge so make sure you are getting the right one for the year of the car.
Pete
1969 MGB Roadster
2020 MG HS Exclusive
2007 Mercedes SLK
Plus 34 other cars since 1965
1969 MGB Roadster
2020 MG HS Exclusive
2007 Mercedes SLK
Plus 34 other cars since 1965
Re: Temperature Gauge
Should a 1974 roadster have the Centigrade, Fahrenheit, or C N H temperature gauge?
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Peter Cresswell
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Re: Temperature Gauge
From October 1968 to the introduction of the 'rubber' bumper cars they were fitted with the C-N-H type gauge. If there is a choice you do need a Negative Earth instrument.
Rubber bumper cars used the same 50mm gauges as fitted to Triumphs and had separate water temp and oil pressure gauges.
Hope this helps
Rubber bumper cars used the same 50mm gauges as fitted to Triumphs and had separate water temp and oil pressure gauges.
Hope this helps
Pete
1969 MGB Roadster
2020 MG HS Exclusive
2007 Mercedes SLK
Plus 34 other cars since 1965
1969 MGB Roadster
2020 MG HS Exclusive
2007 Mercedes SLK
Plus 34 other cars since 1965
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Paul Scott
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Re: Temperature Gauge
Hi Peter,
My 1975 RB has CNH and oil in the same gauge. But I think it was a bit of a bitsa year. I have metal crackled dash with the OD on the wiper stalk. Early tiptronic for me :0)
Other differences are ballasted ignition but with only 1 Relay (Silver Box) next to the fuse box. A bit of both worlds on the change over.
Regards
Paul
My 1975 RB has CNH and oil in the same gauge. But I think it was a bit of a bitsa year. I have metal crackled dash with the OD on the wiper stalk. Early tiptronic for me :0)
Regards
Paul
1975 MGB Roadster
Webguru for MGB Register
Webguru for MGB Register
Re: Temperature Gauge
Thanks for the advice. Mine has the C-N-H gauge so I will get a replacement.
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Michael Barclay
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Re: Temperature Gauge
Hello Steve
Before buying a new gauge you could try adjusting the needle. From your description the gauge seems to be working but the needled seems to have become offset as it reads between normal and C when cold and N and H when the engine is hot. Normally you would expect this to read around the 6 /7 o’clock position when hot.
Try removing the gauge. Easy on a 74 B. Remove the fresh air vent will give you access to the U bracket securing the gauge in the dash. Once out twist off the bezel and remove the glass. (You may have to ease the tags on the bezel)) Then try gently turning needle to read C when cold. Might save you buying a new gauge.
Best regards
Mike Barclay
Before buying a new gauge you could try adjusting the needle. From your description the gauge seems to be working but the needled seems to have become offset as it reads between normal and C when cold and N and H when the engine is hot. Normally you would expect this to read around the 6 /7 o’clock position when hot.
Try removing the gauge. Easy on a 74 B. Remove the fresh air vent will give you access to the U bracket securing the gauge in the dash. Once out twist off the bezel and remove the glass. (You may have to ease the tags on the bezel)) Then try gently turning needle to read C when cold. Might save you buying a new gauge.
Best regards
Mike Barclay