Does the CAI mechanical water temperature guage come with different size sender tubes, as I require the smaller diameter tube to fit my cylinder head.
No, the CAI Smiths mechanical water temperature gauges always come with the same tube/sender/capillary arrangement. The bulb is fitted with a 3/8 BSP sleeve nut and comes with an adaptor to 5/8" UNF male. This is the thread in the head of Austin/Morris A and B series engines, Rover V8 and many engines of that era. There is an alternative adaptor with a 3/8 BSP male/male thread that is often used in the header tanks of race cars. The diameter of the bulb is about 3/8 inch.
Archived in: Racetech gauges11th August 2015
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