Hi

Just a query for confirmation on how these systems are designed to sense coolant temperature using the Cylinder Head Temperature (CHT) sensor alone.

Using Solus Ultra to collect serial data I was alarmed to see that the reported coolant temperature rose rapidly after start-up from cold to read 118 degrees C.

Further investigation led to the discovery of the CHT sensor, which would sense a much higher temperature than the usual ECT arrangement because of its position, fitted in the centre of the cylinder head between spark plugs 2 & 3.

Is the reported temperature typical or should we see a temperature adjusted to reflect the normal range of coolant temperature?

The ECU alledgedly switches the temperature gauge to read either cold, normal or overheating. In this case it never reads above normal.

Any comments (polite) gratefully received.

Regards,

Steve