Sienna FWD V6-3.3L (3MZ-FE) (2006)
Timing Belt: Specifications
Timing Belt
If there is premature parting,
Check for proper installation.
Check the timing cover gasket for damage and proper installation.
If the belt teeth are cracked or damaged, check to see if either camshaft is locked.
If there is noticeable wear or cracks on the belt face, check to see if there are nicks on the side of the idler pulley lock and water pump.
If there is wear or damage on only one side of the belt, check the belt guide and the alignment of each pulley.
If there is noticeable wear on the belt teeth,
Check timing cover for damage.
Check gasket has been installed correctly.
Check for foreign object on the pulley teeth.
If there is any doubt about the belt condition, replace the timing belt.
Install the timing belt in this order.