Doing a bit of a car build for a mate and the replacement engine doesnt have an oil pressure sensor. The plan is to drill/tap the block to take a universal, but theyre 1/8 NPT. Had a swatch on the net and theres no concensus on what the right size drill is. Given its an engine block (cast iron) Id rather not balls it by using the wrong drill!
Does anyone have a reference book on drills for taps? Old school "R"size seemed to be talked about a lot.
Thanks in advance. Bonus picture of engine just for fun.
Does anyone have a reference book on drills for taps? Old school "R"size seemed to be talked about a lot.
Thanks in advance. Bonus picture of engine just for fun.