I'm installing an Auto Meter water temp gauge and didn't receive an adapter with it. Anyone know the thread size of the stock coolant temp sender on a B16A2 engine? (Single wire)... I was going to do a T fitting on the upper rad hose, but I can't find a 1.25 T fitting with a -27 NPT top.
You can't splice into stock wire because values are different and it will ground out. I've been searching everywhere to no avail.