Why does coolant temp cycle?
in 912iS Technical Questions
one hour ago
The coolant temp -- only -- has been cycling. The cycle period is irregular but the amplitude is fixed, between about 152 and 240 F. Here's an example from one flight today. Oil temp (blue line) stays quite constant, as did EGT. Coolant is 1:1 Dexcool:water, OAT was 18 F. I'll attach a graph of the coolant and oil temp data.
What could cause this? Can the temp sensor, or its electrical connections, fail this way? Are there diagnostic tests I can make?
11368_1_KCOQ-KUBE temp graph.jpg (You do not have access to download this file.)
