Yep. I didn't have a 9mm tap and I think the hole was too drilled out to take it anyway. Next size up is 3/8". Didn't want to go higher just to be metric because there is only so much meat on that aluminum thermostat housing. Being a purist has its limits.

1 hour ago, Dadsun said:

Yep. I didn't have a 9mm tap and I think the hole was too drilled out to take it anyway. Next size up is 3/8". Didn't want to go higher just to be metric because there is only so much meat on that aluminum thermostat housing. Being a purist has its limits.

Possibly but I would have gone with a helicoil which would have preserved the factory sized fastener. There is nothing on a classic Z more frustrating than finding an SAE fastener mixed in there...typically after you cross thread it somewhere else

Edited December 19, 20204 yr by Patcon