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1-14 of 14 Results
  1. Problems, Maintenance, and Repair (Gen 1)
    2000 Sienna. Van was overheating. Radiator fan tested bad, so I replaced it. Now, with AC on, it overheats after about 20-25 minutes idling. Both fans turn off/on for a while when Temp gauge shows 50% and stays there maybe 15 min, but then temp gauge creeps up, the fans never come on again...
  2. Problems, Maintenance, and Repair (Gen 2)
    Hello all, 2008 LE, 145,000 miles. After driving on the highway normally for 30 minutes last Saturday, I got check engine, VSC and TRAC OFF lights on when I started it again. I used OBD2 scanner at Autozone and got P0302 code. At first I thought it was because of ignition coils. However, the...
  3. Problems, Maintenance, and Repair (Gen 2)
    2004 Sienna LE FWD with 140k miles on it (original owner). My college bound son has been driving it most of the time recently We are relatively newbies as far as intricate knowledge about all components of cars and looking for some advise and guidance. Here is a chronology of events: Last...
  4. Problems, Maintenance, and Repair (Gen 2)
    I have a 2006 Toyota Sienna with 276k miles on it with a 3MZE engine. Early this year it developed sludge due to failed oil pump. The engine was taken apart by a mechanic to remove the sludge and he did a good job it. The issue I am having now is that the van overheats. There will water...
  5. Problems, Maintenance, and Repair (Gen 3)
    I'm sorry I realized I posted this to the wrong Gen forum, please delete. Thanks
  6. Problems, Maintenance, and Repair (Gen 1)
    The heat on my 03 Sienna stopped working about 2 weeks ago. Today the engine started overheating. Not sure if these are related, but could it be a bad thermostat? If so, how difficult it that to replace?
  7. Problems, Maintenance, and Repair (Gen 2)
    I am driving a 2006 XLE with 194000 miles. The following symptoms began showing this fall in order listed below. Note that all of this was preceded by a failed DRIVER SIDE TEMPERATURE CONTROL SERVO MOTOR that I tied up in the "HOT" position to accommodate colder weather. All problems listed...
  8. Problems, Maintenance, and Repair (Gen 2)
    i have a 04 Sienna. The van was running fine until the starter went bad. But before that in the winter it wasn't heating very well. So while I was putting in a new starter I thought I would change the thermostat. i removed everything including the starter which made it easy to remove...
  9. Problems, Maintenance, and Repair (Gen 2)
    2006 LE 106K miles. started overheating today, opened the hood to find that the reservoir cap had blown open and coolant had splashed everywhere on the engine. Refilled the coolant reservoir and test drive the van, it started heating up quickly again. did not see any coolant leak as the coolant...
  10. Problems, Maintenance, and Repair (Gen 2)
    I acquired a 2004 Sienna in a remarry :) and this is my first real issue with it. Hoping to get some direction here as it does not seem to be a simple fix. First sign of trouble was when I went into a convenience store the other day and left the kids in the Sienna with the AC going...
  11. Problems, Maintenance, and Repair (Gen 1)
    I have 2 Toyota Sienna. A 2007 and a 1998. I bought the 2007 because I loved my 1998 Sienna so much. My 1998 Sienna ran great.It had a crack in the radiator so we replaced it with a new one. No problems for the longest time. Then it started leaking oil. My husband changed the Valve Cover Gasket...
  12. General Discussion (Gen 2)
    For the past 2 weeks, I have noticed that if I have my 2004 Sienna XLE Limited in park with the engine running for 10-15 minutes (with the a/c on), the temperature gauge will rise to the red/hot area. Today, my daughter had the vehicle in park (with the engine running and a/c on) for...
  13. General Discussion (Gen 1)
    I replaced the thermostat on the sienna and drained and refilled the coolant. now it gets hot very quickly, and I have no heat coming from the heater. It acts like an air bubble in the system, but i can not find a bleeder port. The thermostat is a genuine toyota part. I trust the dealer...
  14. Introduction Forum
    Overheating can be caused by anything that decreases the cooling system's ability to absorb, transport and dissipate heat: A low coolant level, a coolant leak (through internal or external leaks), poor heat conductivity inside the engine because of accumulated deposits in the water jackets, a...
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