The threads are a little messy in my k2rd rad, so im going to rethread them. Does anyone know the size and pitch of the hole? Its the same size as the stock rad. The coolant sensor is plastic so it will break if i force it in there.

if you have a tap and die set run a tap into the stock radiator to find the size, or use a die on the plastic screw to find the thread size.

yeah i tried that but im scared im gonna mess up the threads on either, none of them work smoothly.

do you have a nice tap and die set?

Maybe you have course thread and its fine thread, or vise-versa.