Thermostat operation on a six conversion, Still trying to suss out the overheating issue, might be found? Options

[davebrossi]

I tried very hard to get my 914 to Parade, but no matter what we tried, I couldn't stop the motor from reaching temperatures of doom. While I did make it to Parade, the car did not. While there, the theory arose that maybe the thermostat on the 6 had stopped functioning correctly. I just pulled it, cleaned it up, and carried out a boiling test. Hoping someone might be able to tell me if it's functioning correctly or if this is the source of the obstruction to oil flow.

Also worth noting, the 'warm up' time it took to reach 210 was 15-30 minutes. Anyhow, picture time! (IMG:style_emoticons/default/piratenanner.gif)

The following four photos were at 'boiling' (212 at least)









At partial cool down (within five minutes of removing the thermostat from boiling water)







As an addendum; I have a laser thermometer so I had plenty of fun chasing after various temperature readings. I do not have the traditional 911 front mounted oil cooler (and the second thermostat associated with it) and opted for a simplified aux oil cooler with switch controlled electric fan. The difference in temp between oil entering and leaving the aux cooler is significant, I do not believe the car is unable to cool oil in normal conditions, but something changed when I dropped the motor. I've checked all the external oil lines and nothing appears wrong. No lines are touching the exhaust headers, and to test the theory that I had installed the engine rubber with gaps I made certain to seal every stretch off with high temp tape before a run. No change.