Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2010SIENNA FWD V6-3.5L (2GR-FE)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINETIMING COVER
2010 Toyota Sienna FWD V6-3.5L (2GR-FE)
Timing Cover
2010 Toyota Sienna FWD V6-3.5L (2GR-FE)SECTION Timing Cover
TIMING CHAIN COVER SUB-ASSEMBLY
Temporarily tighten the timing chain cover with the 23 bolts and 2 nuts.

Bolt length:

Make sure that there is no oil on the bolt and nut threads.
Fully tighten the bolts in this order: Area 1 and Area 2.
Torque 21 Nm (214 kgf-cm, 15 ft-lbf)
Fully tighten the bolts in Area 3.
Torque 21 Nm (214 kgf-cm, 15 ft-lbf)
Tighten the bolts and nuts in the order of upper to lower as shown in the illustration.
Fully tighten the bolts in Area 4.
Torque 43 Nm (438 kgf-cm, 32 ft-lbf for bolt A)
Torque 21 Nm (214 kgf-cm, 15 ft-lbf for bolts except bolt A)
Tighten the bolts in the order of lower to upper as shown in the illustration.
Temporarily tighten the timing chain cover with the 23 bolts and 2 nuts.
Bolt length:
Make sure that there is no oil on the bolt and nut threads.
Fully tighten the bolts in this order: Area 1 and Area 2.
Torque 21 Nm (214 kgf-cm, 15 ft-lbf)
Fully tighten the bolts in Area 3.
Torque 21 Nm (214 kgf-cm, 15 ft-lbf)
Tighten the bolts and nuts in the order of upper to lower as shown in the illustration.
Fully tighten the bolts in Area 4.
Torque 43 Nm (438 kgf-cm, 32 ft-lbf for bolt A)
Torque 21 Nm (214 kgf-cm, 15 ft-lbf for bolts except bolt A)
Tighten the bolts in the order of lower to upper as shown in the illustration.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.