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**1project2many** · 01-20-2016, 08:16 AM

I once used a special adapter to install a 1/2" NPT sender in a head with a 3/8" NPT hole. As long as the sender touches coolant you will get a reading. I can't say where the adapter was originally sourced though... I have a big bucket of brass miscellaneous fittings that I paw through for jobs like this.

01-20-2016, 08:16 AM	#8
1project2many Senior Member Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,217	Re: '55 2nd Series Temp Wiring I once used a special adapter to install a 1/2" NPT sender in a head with a 3/8" NPT hole. As long as the sender touches coolant you will get a reading. I can't say where the adapter was originally sourced though... I have a big bucket of brass miscellaneous fittings that I paw through for jobs like this.