Drilling a Tstat????

**WHT98GTP** · 09-25-2009

Hey guys, I got a replacement 160* tstat for my car and someone mentioned to me that i should drill two small holes in it so I can bypass some of the coolant. Ideas???

**BillBoost37** · 09-25-2009

If your mod list is up to date in your sig, there's no mods I see there that would keep you from running an undrilled 180F. A 160F would be serious overkill and a drilled 160F may not allow you to have heat in the winter. (If you are in a northern climate)

I'd think you need to upgrade the radiator if you are having cooling issues.

**Street Wolf** · 09-25-2009

A 160 for you is indeed overkill, however even if you install a 180 you do need to drill it. No if and or buts.

Being drilled allows a constant flow of (some) coolant therefor preventing, or at least helping to prevent the hairline cracks your heads from forming. Which these engines are surprisingly bad about.

I makes sense, because to put it very simply. Your not just dumping 'cold' coolant onto a hot motor all at once like you are without it being drilled.

**Bio248** · 09-25-2009

what the hell do you need a 160* thermostat for? even the most highly modded guys dont even need to run that cold.

**Jakegday** · 09-25-2009

wont a 160 degree thermostat cause the SES light to come on? something about it taking the engine too long to warm up?

**Bio248** · 09-25-2009

the engine will still take the same amount of time to warm up to that 160*, but it will run cold, MPG will suffer, and you might throw an SES. a cold engine is always the fastest engine, but 160* is pushing that limit. thats besides the fact that your radiator fans will probably never turn off.