TD42 Thermostat housing bolt thread size?

[mudski]

I'm not sure of the pitch. It looks like 1.5 by eye.
I changed out the stat and the gasket was an aftermarket one and the holes in the gasket weren't exact apart and upon putting the bolts back in one went in on a slight angle. So now I have to find a tap and and run this down the thread to bring it back to life.

[nissannewby]

Standard M8x1.25

[MudRunnerTD]

Or drill out and M10 Helicoil

[mudski]

Or drill out and M10 Helicoil

I think I will get away with running a tap down it. It only grabbed and turned maybe 1 1/2 turns before I stopped.