Haltech E6K - Manual (Page 20)

14
1.3.2. Coolant Temperature Sensor
The coolant temperature is used by the computer to determine warm up corrections and adjust
fuel mixtures.
The coolant temperature sensor has a solid brass temperature sensing tip. Refer to the diagram
for technical details of the sensor. The coolant sensor supplied is an industry standard
component and some engines may already have provision for this type of sensor.
The coolant temperature sensor is designed to screw into a threaded hole and protrude into the
engine coolant stream. For air cooled engines, the sensor can be embedded directly into the
engine block or used to sense oil temperature.
Locate a suitable position on the engine which will allow the hole and thread to be machined,
and which gives access to the coolant stream. The sensor should be mounted after the engine
and before the thermostat in the coolant circuit. Since most engines have existing temperature
sensor holes, it is often possible to mount the Haltech sensor in one of these holes. A thread
adapter is sometimes necessary. In some engines only one temperature sensor hole exists and
is used for the dashboard gauge sender. It is usually possible to install a tee-piece to allow
both the dashboard sender and the Haltech sender to share access to the same threaded hole.
If it is necessary to drain the coolant from the vehicle to fit the temperature sensor then the
factory manual for the engine should be consulted for the correct procedure to restore the
coolant and purge the cooling system of air.