Knock Sensor: Replacement

1. Disconnect the fuel pipe No. 1.
   1. Remove the EFI fuel pipe clamp.
   2. Pinch the tube connector and then pull out the fuel pipe No. 1.
   Fig 1: Disconnecting Fuel Pipe No. 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • Check if there is any dirt or mud around the connector before this operation and remove the dirt as necessary.
   • Be careful of mud because the quick connector has an O-ring which seals the pipe and connector that can be contaminated.
   • Do not use any tool in this operation.
   • Do not bend or twist the nylon tube. Protect the connector by covering it with a vinyl or plastic bag.
   • When the pipe and connector are stuck, push and pull the connector to release and pull the connector out carefully.
   Fig 2: Sectional View Of Fuel Pipe Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Lock the hose clamp as shown in the illustration.
Fig 3: Locking Hose Clamp
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the heater water inlet hose B.
4. Remove the nut and the ground cable.
5. Disconnect the 6 fuel injector connectors.
   Fig 4: Disconnecting Fuel Injector Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. In order to remove the intake manifold, using several steps, remove the 9 bolts and the 2 nuts in the sequence shown in the illustration.
Fig 5: Remove Intake Manifold Bolts And Nuts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the 2 bolts and the engine mounting stay.

1. Disconnect the radiator hose inlet.
Fig 6: Removing Radiator Hose Inlet
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the radiator reserve tank hose.
Fig 7: Removing Radiator Reserve Tank Hose
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the engine coolant temperature sensor connector.
4. Remove the clamp.
5. Remove the 2 bolts, the 2 nuts and the 2 washers.
6. Lock the hose clamp as shown in the illustration and remove the water outlet together with the water by-pass hose No. 1.
7. Remove the 2 gaskets from the 2 cylinder heads.

Fig 8: Removing Knock Sensors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the 2 knock sensor connectors.
2. Remove the 2 nuts and the 2 knock sensors.

1. Install the 2 knock sensors with the 2 nuts as shown in the illustration.

   Torque: 20 N.m (199 kgf.cm, 14 ft.lbf) 

2. Connect the 2 knock sensor connectors.

Fig 9: Installing Knock Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Install 2 new gaskets to the 2 cylinder heads.
2. Install the water outlet together with the water by-pass hose No. 1 and unlock the hose clamp.
3. Tighten the 2 bolts, the 2 nuts and 2 washers.

   Torque: 15 N.m (153 kgf.cm, 11 ft.lbf) 

4. Install the clamp.
5. Connect the engine coolant temperature sensor connector.
6. Connect the radiator reserve tank hose.
7. Connect the radiator hose inlet.

Torque: 23 N.m (235 kgf.cm, 17 ft.lbf) 

1. Install the intake manifold with the 9 bolts and the 2 nuts. Using several steps, tighten the bolts and the nuts uniformly in the sequence shown in the illustration.
   Fig 10: Tightening Sequence Of Intake Manifold Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Retighten the 2 bolts and 2 nuts of the water outlet.

   Torque: 15 N.m (153 kgf.cm, 11 ft.lbf) 

3. Retighten the water outlet mounting bolts and nuts.

   Torque: 15 N.m (153 kgf.cm, 11 ft.lbf) 

4. Install the ground cable with the nut.

   Torque: 8.4 N.m (86 kgf.cm, 74 in.lbf) 

5. Connect the heater water inlet hose B.
6. Connect the fuel pipe No. 1.
   Fig 11: Connecting Fuel Pipe No. 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Push in the fuel tube connector to the pipe until fuel tube connector makes "click" sound.
      NOTE:

      • Check if there is any damage or foreign objects on the connected part.
      • After connecting, check if the connector and the pipe are securely connected by pulling on them.
   2. Install the EFI fuel pipe clamp.