Last post on Aug 22, 2012 at 5:06 PM
You are in the Toyota Sienna
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Toyota Sienna, Van
#1 of 14 2012 Sienna Hydrolocked Engine
Aug 15, 2012 (8:46 pm)
Has anyone ever had their 2011+ Sienna engine hydrolock after driving through heavy rain? It happened to my wife recently with our 1-week old 2012 Sienna with just 400 mile on the odo. Googled the topic and found a discussion on another site. It happened to two others within this year. One in San Fransisco in Feb/2012 and another in Miami in May/2012. Hydrolock is when the engne sucks in water and dies. Stuff bends inside and ruins the engine. It's not covered under the new car warranty. The 2012 Sienna air intake is up front and, in my opinion, seems prone to suck in every drop of rain splash that gets near it.
#2 of 14 Re: 2012 Sienna Hydrolocked Engine [missmy06]
Aug 17, 2012 (6:40 pm)
New name, same wife? Just kidding. I'm here to haunt you.
To bring everyone up to speed, I did some comparisons on the air intact tract & air cleaner box on the 2GR-FE engine as used in the Gen-2 (2007-2010) Sienna verses the same engine as installed on the Gen-3 vans.
The newer models appear like they could be more prone to channeling water that might make it up under the hood front lip to the engine. Low spots, routing, resonator chamber placement, size and positioning of the air cleaner box & filter on the older models look to provide plenty of opportunity for separation (water to drop out and drain away).
#3 of 14 Hydrolocked 2012 Sienna
Aug 17, 2012 (7:28 pm)
Yep, same guy. I thought it was fitting after so much has been said and done. Bought an '06 Sienna, certified used back in '09. Had it for three years, no issues. Loved Toyota, bought a new one, dead in a week, the love is gone. I miss my 06 Sienna.
#4 of 14 Re: Hydrolocked 2012 Sienna [missmy06]
Aug 18, 2012 (7:44 am)
Your 3MZ engine (2004-2006) uses the same design as the later Gen-2 (not unexpected being the same engine bay), so my commentary on layout applies.
#5 of 14 Re: Hydrolocked 2012 Sienna [fibber2]
Aug 18, 2012 (9:01 am)
Wow, fibber2, you know more about these engines than I will ever. Do you know if the Avalon shares the same air intake design as the Sienna?
#6 of 14 Re: Hydrolocked 2012 Sienna [missmy06]
Aug 18, 2012 (5:04 pm)
Looking into my crystal ball and saying along with Bullwinkle: "Eenie meenie chili beanie, the spirits are about to speak."
You are just too easily impressed! Part of good engineering practice is a strong reliance on research - both original and prior art. Stated another way - I'm really really really good at looking things up!!
So, just for fun, I went looking for information on the Air Cleaner Assembly for the 2006 Avalon (as that matches the year of your old Sienna), and voila, it shares almost every single part!
#7 of 14 Re: Hydrolocked 2012 Sienna [fibber2]
Aug 18, 2012 (8:16 pm)
Lol. How about the current gen Avalon? Do you think it shares the Air Cleaner Assy of the 3rd gen Sienna?
#8 of 14 Re: Hydrolocked 2012 Sienna [missmy06]
Aug 18, 2012 (8:28 pm)
I met with "Deep Throut" in the parking garage earlier in the evening. Along with more secrets about 'Tricky Dick', he revealed to me that the 2011 Avalon (no info available on the 2012) shares the same design as the 2006.
#9 of 14 Re: 2012 Sienna Hydrolocked Engine [missmy06]
Aug 20, 2012 (12:34 pm)
I've heard of a couple of cases of hydrolock before, but both happened off road while crossing water.
Do you think it's possible she ran over a large puddle or standing water?
#10 of 14 Re: 2012 Sienna Hydrolocked Engine [ateixeira]
Aug 20, 2012 (5:46 pm)
Both. She said there were puddles on the main roads that she drove over on her way back home. And there was standing water in some areas when she entered our subdivision. Our subdivision isn't flat so there were areas that appeared to be deeper that she avoided and areas that had no standing water. Based on her description, I imagine she drove through approx 6" standing water at 5-10mph when the engine stalled.