PRO TECHNICIAN

Disassembly

Inspect Camshaft Timing Gear (with VVT-i)
Retard side
Advance side
 

 
During engine operation, applying the engine oil pressure to the advance side unlocks the lock. For inspection, compressed air is used instead of engine oil pressure.
NOTE: the following procedure applies to 1NZ-FE engine. Refer to the relevant repair manual for the other engine types.
 
1. Apply compressed air to both the advance side and retard side.
HINT:
Applying compressed air to both the advance side and retard side prevents the timing gear from moving suddenly when the lock pin is released.
 
2. Lessen the compressed air on the retard side and move the timing gear to the advance side.
HINT:
The difference of the compressed air pressure between advance side and retard side moves the timing gear to the advance side

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