Jim
Again, great info on your site re the B10/8 sensor - nice work.
Best to get the DVM out I think and take some real measurements before I replace this. Trouble is, now my viscous is working, my car never reaches above 85C
Time to remove the sensor and dip it in some hot water!
Yesterday I took her for a spin - ambient temp was 20C. Urban driving for 45mins with A/C on, temp reached 85C max (IC) and was constant throughout. Following, I spent 20mins at around 40-50MPH constant - IC gauge reports 82C. Then onto some hard driving using manual shifts and keeping the revs high for around 15mins - gauge never exceeded 85C. This sounds almost ideal and how I would have designed the vehicle's cooling performance.
I believe the most efficient operating temp of petrol engines is somewhere around 85-95C, so mine's maybe on the lower side but as you've mentioned previously - more horses for your buck!
I can also confirm that the clutch disengages at around 4000RPM as previously mentioned by myarmar, and will re-engage too but I failed to note at what RPM - I'm sure it was around 2000RPM.
However the system was designed, my vehicle's cooling now operates superbly and the car is, as usual a complete joy to drive; hence I got carried away and forgot to note some RPMs.
Let's hope today brings more sun
