Three problems related to radiator hose have been reported for the 2008 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Toyota Sienna based on all problems reported for the 2008 Sienna.
My 2008 Toyota Sienna began to create a smoke screen impairing me from having a clear visual of the road. I had to immediately pull to the side of the freeway and check if my vehicle was on fire. Once I inspected the outside and open the hood to make sure nothing was on fire I notice a puddle of oil under the vehicle an upon further look my engine motor oil cooling hose had burst, spraying the motor and everything inside with motor oil. This was the 3rd time this vehicle has done the same problem.
2008 Toyota Sienna. Consumer writes in regards to vehicle engine problems. The consumer stated the air condition was not cooling the vehicle, and she thought it just needed to be serviced. After two hours of driving, the check engine light illuminated. By the time she was able to pull over, the engine was ruined, the dealer stated the engine water hose and oil hose had malfunctioned.
The rubber in the oil cooling line broke down and drained most of the oil from the engine. From looking at the different boards this seems to be a common problem with this hose. Toyota even re-designed the hose with a metal sleeve because of this.