Questions about 160 thermostat
09-09-2018, 07:47 PM
#16
09-10-2018, 12:22 AM
#17
When I got my new engine replaced under CPO(from bore scoring on a .2 3.6) it came back with a LTT. I can tell a diff in warm up. It peaks at 160-180 and only gets to 200 if I push it after it gets to 160 and on really hot NC days.
09-10-2018, 09:52 AM
#18
I have only had my 997 for 3 oil changes; first 2 with stock thermostat, last one with 160. I have sent all 3 to Blackstone no difference between them. I'll add that the only noticeable difference besides a slower warm up is a slightly cooler running (cruising) temp. I know the engineers will dispute this but it is definitely true. Perhaps the original thermostat was not accurate, who knows.
09-11-2018, 07:12 AM
#19
Rennlist Member
Im curious those of you whom are running the 160 degree thermostat, I have noticed after 6 months driving with it, my mpg has went down slightly (maybe 1mpg) which I don't care for much. However what im curious is that with the delayed warm up, does this increase fuel dilution into the oil? I guess what im wondering is that if you do run the 160 thermostat, is it necessary to reduce the oil change interval and/or possibly increase the oil weight due to fuel dilution?
Thanks
Thanks
It's a misconception that the engine takes longer to warm up with a low temperature thermostat. In fact, it gets to it's target temp just as fast as a standard thermostat. The only difference, is once it is fully open (183F), it stays open. The factory thermostat starts to open at 185F and isn't fully open until 210F.
Another misconception is that the thermostat stays open, which it doesn't, after warm up. The factory thermostat will cycle open and closed as coolant temp bounces between 185F and 210F, so you end up with times where the coolant is looping internally in the engine, whereas the low temperature thermostat will typically stay open as the cooling system is incapable under most circumstances of keeping the coolant at 160F.