Because of the relatively low cost involved, I should probably not bother to post this but ...

I need to replace my water pipe and will need to remove the thermostat to do so. I just replaced the thermostat 8/22/22.

Should I replace the gasket on the thermostat?

 

Might not be a bad idea to have one on hand. The gaskets are pretty cheap compared to the work involved in getting to it.

https://www.ecstuning.com/Mini-2012-...mostat_gasket/

 

you should have just replaced that water pipe the same time you did the thermostat. I agree with Nik, you are there, might as well just replace it. I know what a PITA it is to do that job, i have replaced that stupid pipe twice in under 1 year. Buy an OEM water pipe and not a knock off, i had the Rein one, and it started leaked at the o ring into water pump after less than a year.

 

I did replace the pipe when I replaced the thermostat.

You are right about buying a mini pipe! I bought a Burgaflex pipe from Pelican. The o ring on the thermostat side was too bog and I had a hell of a time getting it to fit.

A while after I had completed the job, the pipe began to leak again. Pelican was great about a credit for the pipe and I have a new mini pipe on hand waiting to replace the Burgaflex.

Replacing that pipe is a tough job. I see people recommending removing the intake manifold to do it, but I'll try it gain without doing that.