Cylinder Head Temperature (CHT) Sensor Removal/Installation

NOTE:

Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
Perform the following procedure for easier access.
1. Remove the ventilation hose. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
2. Remove the vacuum hose (to purge solenoid valve). (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
3. Remove the fuel hose. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
4. Remove the fuel distributor. (See FUEL INJECTOR REMOVAL/INSTALLATION .)
5. Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
Disconnect the CHT sensor connector.

Fig 1: Identifying CHT Sensor Connector
Courtesy of MAZDA MOTORS CORP.
Remove the CHT sensor using the following tools.
- Socket 3/8", 20mm, 6point
- Ratchet handle and torque wrench 3/8" Drive
  
  Fig 2: Removing CHT Sensor
  Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
Tightening torque

9-10 N.m {92-101 kgf.cm, 80-88 in.lbf}