oil and coolant temp reading high

[Seagull]

I am based in So California, on hot summers, flying a RV-12 with a 912ULS. On full power climb outs my oil temp will easily hit 240f. I’m trying to track the problem first by tested the temp sending unit. I also pulled the coolant senders (same part number) to compare. I powered the plane with the battery charger and one at a time connected each sending unit to the oil wire. I boiled water in a pan and kept the fire on while testing. Two of them read 214f and the third 216f.

Considering The density altitude today was 4500’ and allowing for 1 degree drop for every 500’ above sea level the water temp at boiling should be 203f. This test indicates either 3 bad sending units reading high or the Dynon Skyview is out of calibration.

If there is an error in my testing let me know.

My question is there a way to re-calibrate the temp range on the Skyview?

 

[boblid]

Are you using Evens Waterless Coolant? If so change to Prestone 50/50 pre diluted. Evans is no longer approved by Rotax. There should be a label on the top of you coolant reservoir if you have Evans. Evans runs significantly hotter temps.

 

[Seagull]

I use Prestone Dex-Cool (orange) for coolant. I recently changed from Prestone (green), no difference in temps, I changed because the orange is easier to see in the reservoir under the cowl.

 

[airguy]

Your coolant circuit is under pressure and does not operate at ambient. It will boil at a higher temperature than you are calculating.

 

[Seagull]

Thanks for the input but please read the first post, I am dealing with oil temperature not coolant.

 

[airguy]

Thanks for the input but please read the first post, I am dealing with oil temperature not coolant.

Fair enough, missed that. Check the sensor type in the EMS configuration - is it set up correctly?