Attention! If your radio has an anti-theft code, check that you have the pairing codes before disconnecting the battery.
Attention! On models since 1993, the airbag system is disabled if the battery is disconnected for an extended period. If the airbag warning light comes on and stays on after reconnecting the battery, take it to a specialist workshop to restore the system to normal.
Removing
1. Remove the ground wire from the battery.
2. Drain the coolant from the cooling system.
3. Remove the air filter housing, throttle, fuel injectors and air intake.
4. Unscrew the upper idle pulley bracket.
5. Mark and disconnect the remaining wires, hoses and brackets from the intake manifold. On the 3VZ-FE engine, remove the bypass pipe of the cooling system.
6. Unscrew 8 nuts and bolts and separate the intake manifold from the engine.
7. 1MZ-FE engines have a cooling system pipe that is only accessible after removing the intake manifold, so it is recommended to inspect the condition of the cooling system pipe and, if necessary, replace it when removing the intake manifold.
Installation
1. Clean the mating surfaces of the intake manifold and cylinder head.
2. Install the intake manifold with a new gasket on the engine and secure with bolts, tightening them to the required torque.
3. Further installation is carried out in the reverse order of removal.