I have a 98SE and a 97SSEi. Last year at this time, on my 98 SE I experienced the dreaded 'upper and lower intake manifold failure' issue which I posted here in detail. A friend and I did all of the repairs and one of the suggestions made in this forum, which we followed, was to install a 180 degree thermostat so the engine would run cooler. My question then is should I install a 180 degree thermostat in my 97 SSEi as well? Would this have the potential to eliminate the manifold failure issue I had on my 98SE? Any other benefits to installing the 180 degree thermostat?

Well, the good news about the SSEi is the dreaded plastic UIM is replaced with a big ole SC, however if you intend to modify, it wouldnt hurt to put in a lower T-stat.

You don't have to have one, but it helps. Plus, if you plan on modifying in the future, it is a must-have.

YES , it always helps, heat is a killer on a SC motor or any motor

do it. and if you are really concerned about heat, drill some holes in it too.

***Please do not do this until you are fully educated on the procedure***

Being in NC I would not suggest drilling holes or replacing the T-stat at this time unless you have heat issues. Heading into the winter you will want the car to warm up to the proper temperature.

Drilling holes will make it warm up much slower.

Being in New England I will be swapping back to a 195 thermostat soon as winter approaches.