Water Temperature Sensor Installation Guide
AiM Water Temperature Sensor Installation Guide
This guide explains how to install and configure the AiM water temperature sensor for MyChron 5 and MyChron 6 systems. Correct installation ensures accurate coolant temperature readings for kart engines in New Zealand and Australia.
What the water temperature sensor does
The water temperature sensor measures coolant temperature as it circulates through the engine. It is essential for:
- Preventing overheating
- Jetting and tuning decisions
- Monitoring engine health
- Detecting cooling system issues
What you need
- AiM water temperature sensor
- AiM hose adaptor (10mm or 12mm depending on engine)
- Hose clamps
- 8mm spanner
- Coolant
- Zip ties
1. Choose the correct hose location
For the most accurate reading, install the sensor in the radiator hose closest to the cylinder head. This gives the earliest warning of overheating.
2. Install the hose adaptor
- Remove the radiator hose section where the adaptor will be installed.
- Slide the hose over each end of the adaptor.
- Tighten both hose clamps evenly.
- Ensure there are no coolant leaks.
3. Install the water temperature sensor
- Screw the AiM water temp sensor into the adaptor port.
- Tighten until snug—do not overtighten.
- Route the cable neatly along the chassis.
- Keep the cable away from the exhaust and moving parts.
- Plug the sensor into the CHT/WT port on the MyChron.
4. Recommended temperature ranges
| Engine | Ideal water temp |
|---|---|
| Rotax | 50–55°C |
| Vortex | 45–50°C |
| IAME | 50–55°C |
| Briggs & Stratton | 60–70°C |
5. Bleeding the cooling system
After installation, air may be trapped in the cooling system. Bleed the system by:
- Filling the radiator completely
- Tilting the kart to release air bubbles
- Running the engine briefly with the cap off
6. Testing the sensor
Start the engine and check:
- The temperature rises gradually
- No sudden spikes or dropouts
- No coolant leaks around the adaptor
7. Troubleshooting
- 0°C reading: Sensor is in the wrong port or not fully connected.
- Erratic readings: Cable routed too close to ignition wiring.
- Overheating: Air in the system or blocked radiator.
- Leaking adaptor: Tighten clamps evenly.
See also: