what size adapter do i need for the sender unit for my oil pess gauge? i either ordered wrong, or they gave me the wrong one, but its not fitting up to any of the fittings on my oil filter housing thingee. i have a 2G

 

I had the same issue, you need to take the old oil pressure switch and find an adapter fitting that has the right thread for the block and then your sending unit. Advance was able to help me put mine together..try them

 

yeah took all of those out, tried a total of 4 i think. im pretty sure i just ordered the wrong size adapter. im gonna go to advance, i just need to know what size adapter to pick up hector the hunter