2008 Toyota Sienna repair guides
2008 Toyota Sienna timing belt or chain?
The checked 2008 Sienna FWD 3.5L 2GR-FE service manual identifies a timing chain and includes chain removal and installation references. Confirm your engine and drivetrain before using the manual or ordering parts.
Check the service manual
The timing chain is an internal engine component. Do not confuse it with an external drive belt. The checked archive has a timing-chain chapter and a service-and-repair section; use the complete instructions and the information for your exact vehicle before work begins.
Before diagnosing or ordering
A noise or fault code does not by itself establish that the chain needs replacement. Diagnose the actual symptom using the matching manual. This reference was checked for the FWD 2GR-FE configuration; verify other configurations separately. We have not established a replacement interval, labor time, torque values, or exact parts for your vehicle from this source.
Find the manual for your Sienna