Oil temp guage
If you want to check your oil and water temperature sensors its quite easy. Simply dangle them in a kettle of boiling water and they should both read 100°C. And yes, both are important. Water overheating is the first sign of a leaking head gasket which Bristols are very prone to. Intervene early rather than damage your irreplaceable cylinder head. Secondly, oil temperature is critical as we read below both cold - and hot which should not exceed 100°C. Bristol aerodynes have quite limited airflow under the bonnet in some cases. A spell of high-speed driving on hot day will certainly bring your oil up to its limit, Though I am aware that modern cars may be redlined at 120°C I think it's best to follow Filton's original specification as rebuilds are so costly.
These instruments can readily be repaired by specialist instrument repairers. I I've paid £50 last time? Oh, and when you're finished replace the kettle in the kitchen, having done your best to remove all traces of antifreeze & oil from its interior in the interests of domestic harmony.
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