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I just purchased a 2013 Toyota Sienna LE and realized that not all of the 2013 models came with towing capacity. The booklet says it can tow up to 3500lbs, but I am hearing that the LE's may not have a Transmission engine Oil cooler. We tow a Popup that weights about 3,000lbs fully loaded and take it out west. Do I need to upgrade/install a transmission engine oil cooler to it?
Thanks for everyone's help here.
 

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The factor in Sienna tow capacity is NOT related to the tranny cooler (all have the basic in-radiator heat exchange), but an oil-to-water Engine Oil Cooler. The 2GR-FE engine reportedly has some oil coking issues if the internals get too hot. Basic as-is towing capacity is 1500 lbs, but with the cooler it jumps to 3500 lbs.

This is a composite I made for the Gen-II vans, but the Gen-III are very similar.

 

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This is a composite I made for the Gen-II vans, but the Gen-III are very similar.

This is very helpful. On our Gen III van it is quite easy to see the two insulated hoses (numbered 7 and 8). You can feel past the exhaust manifold (when the engine is cold, of course) for the heat exchanger, but it is a little harder to see than in your picture.

Thanks for this information.

Bill
 

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Agree Bill. It's more tucked under the manifold on our 2015, but the basic hardware is still the same for the engine oil heat exchanger. I tried to take some new pictures, but it's much harder to capture.
 

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The irony here is that I bought a 2011 Limited AWD sight unseen from a private party in CO assuming it had the tow package because it has a hitch...and because I heard "they all come with the tow package." I subsequently saw information here that suggested otherwise; there is a chart posted in the GenIII forum that suggests the tow package was not even available on XLE/Limited AWD vans in certain years. So, I am quite pleased to report that mine has the tow package after all, and that I was able to verify using these pictures. Really appreciate getting to the bottom of this...

Bill
 

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Its too bad that the 3rd Gen does not come with a second transmission cooler like the Highlanders do. If I ever tow anything with my Sienna I will make sure before I do to add a trans cooler. An extra trans cooler can save you big bucks down the road in repair costs.
 

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Hi All, I'm sorry to revive a dead thread, but I'm investigating adding an engine oil cooler to my '13 LE AWD. From what others have said, adding the factory components is probably money and time prohibitive.

The other option would be to add a remote oil cooler. But it sounds like people got hung up on the fact that the Sienna uses a cartridge oil filter and not a spin on one.

Maybe these are new, but has anyone considered a 'Cartridge To Remote Spin On Oil Filter Adapter' by Baxter performance?

http://www.shop.bpadapters.com/TR-101-BK-Cartridge-to-Remote-Adapter-TR-101-BK.htm

Then one could reroute those lines to an add-on engine oil cooler kit like Derale 'Part Number 15451 13 Row Plate & Fin Engine Oil Cooler Kit with Spin On Adapter' kit, replacing the spin on adapter with the cartridge adapter from Baxter:

http://derale.com/products/fluid-coolers/engine/series-8000-plate-fin/1-pass-12-heat-sink-cooler-detail

http://derale.com/images/stories/virtuemart/product/pdfs/15451.pdf

Then I should only need to add a transmission oil cooler, and perhaps a heavy duty radiation, and then I could tow the full 3500 pounds?

This has probably been thought of before and there's a good reason why it wouldn't work, but I thought I'd check.
 

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Something like the Baxter adapter has been the missing link for the past 10 years, and could be the solution. Nice find! Are you going to do it?
 

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I don't have a need to tow all 3500 just yet, but I may in the future. I'm just trying to get my research done. I wonder how much this setup would complicate oil changes?
Odd, were you able to solve Oil Cooler issue? I am trying to figure out what to do with our 2013 Sienna LE. Thanks!
 

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I haven't done it. I keep posting the info on the forums hoping somebody else will take the plunge first.
Thanks for the update! Man, it is the only component needed to bring the Sienna 2013 LE to 3500. I am hoping to find a solution to avoid having to upgrade to a Sequoia.
 
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