Is there any true advantage if your Bonne is only a daily driver? Is the 180 stat supposed to be used for this mod.? These questions are for the 95 SSEi.

Thanks everyone.

I would think a balanced theremostat would be best in any vehicle.

A drilled one would allow for coolant flow during closed periods which would result in less 'hotpsots' in the engine but a, probably not noticble, longer warmup period. This would not be bad or hurt the engine at all.

A 180 would be ok for the summer, but if you live where it snows then a switch back to a 195 for the winter might be recommended. Don't expect to run alot cooler. The thermostat only opens at 180, while engines are typically designed to run at about 200.

you need to RE-clarify... 90 SSEi?

Sorry, I meant 95 SSEi.

I think the most important reason for drilling the thermostat is to help the engine get rid of air that can become trapped when the engine is opened up for routine parts replacement. I like to set one of the holes at the high point to encourage air to bleed into the radiator.

Maybe the LN3 and the L27 aren't so bad this way, but the L36 really benefits.

So I guess the answer is..................no it doesn't matter since it gives added protection regardless..............Thanks everyone, I'll go with that.

A drilled thermostat may stop a motor from warming up enough in an allotted amount of time which may cause you to throw a code. Also Knock sensors may not activate until the car is warmed beyond a specific temp (160 or so) and this may hurt if you flog the car before its warmed up.

He won't have that problem with either car in his sig.

Understood, just didnt want people being to general with the info.

I agree.