Int Thermostat 2.7 911

cord68 · cord68's Garage

I now this is another thermostat question but i need to ask anyway. Arfter fixing a few oil leaks and changing my oil took the car for a run oil temp when strait to the red and stayed i have checked all the lines and cant find any leaks or kinked hoses so i thought of the thermostat.I removed the thermostat and tested in water at 91celsius the thermostat does not open .I checked this several times. I then rotated the inner sleve and tryed again at 93 celsius and it opens a little.If you look in inside of the thermostat it has 83 c stamped ther is this its opening temp? so my real question is once this is freed up will it still work or am i just wasting my time and replace it i have read that in the US these are quit cheap but here in AUS they are $300.+or was quated $150 for seconhand one.what sort of life do these thermostats usually have.? And if they are fully open at 195 F and thats normal operating temp what harm would ther be in tearing the guts out of the thermostat and running it free flowing in summertime.?

Bill Verburg · Bill Verburg's Garage

The purpose of the t-stat is a quicker warmup phase. If it is stuck closed warmup proceeds w/o hindrance, as you have found.

If you remove it the car will take much longer to reach operating temp., not good, but you could do that.

The opening temp has varied a tad depending on year and model but ~80&degC is normal.

cord68 · cord68's Garage

hi
bill thanks for the insight i have since tested the thermostat again.
This time bringing to bowl on the stove.Thermostat did start to open around 85 deg celsius once fully opened at 91 deg celsius.

Now letting it cool slow it was neather opend or closed between 75 to 85 deg celsius it did not open on cooler side again till temppreture had droped to 63 deg celsius I for the life of me cant see that engine mount oil cooler dropping my oil temp by 25 to 30 deg celsius for the cycle to start again.?

Bill Verburg · Bill Verburg's Garage

The t-stat mechanism is a wax that changes phase, solid ->liquid->solid. There is always going to be some lag between phases