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Toyota Sienna Engine Problems

60 messages,  Last post on Oct 23, 2009 at 9:23 AM

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#51 of 60 Re: 04 Sienna LE Exhaust Heat Shield [buckynix] by wr31 Aug 20, 2009 (7:33 am)
Replying to: buckynix (Jul 28, 2009 4:38 pm) Did you ever replace this part? I had the same thing happen last week on our 04 Sienna LE - I removed the shield and am driving without it now. So far, no problems, but am concerned about the heat. What did you do? Replies to this message: da763 (Aug 20, 2009 9:20 pm)
#52 of 60 Re: 04 Sienna LE Exhaust Heat Shield [wr31] by da763 Aug 20, 2009 (9:20 pm)
Replying to: wr31 (Aug 20, 2009 7:33 am) No, I haven't replaced it. I've kind of taken a wait and see approach. I check the pipe and fan area about once a week and I can't see that there's been any further damage from running without the shield. There's about 8+ inches of clearance between the pipe and the fans, and there are two fans in the area, but nothing else close, so I think it has more than adequate cooling to get by.   I would be interested in the response you get from Toyota if you take it in to be repaired. Since I'm long out of warranty, I'm leery of this leading to some much larger and more expensive repair.
#53 of 60 WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? by oldnslo1 Sep 29, 2009 (10:27 pm)
That is a question I'm a little curious about. IF I ever have an engine failure [128k, runs great, lived it's entire life on Mobil I] I wonder if it would be possible to fit a 3.5 where the 3.0 was without too much difficulty.   Any Toyota techs out there heard of such a thing?+ Replies to this message: ateixeira (Sep 30, 2009 11:52 am) oldnslo1 (Oct 02, 2009 6:29 pm) ateixeira (Oct 05, 2009 11:17 am) wwest (Sep 30, 2009 5:09 pm)
#54 of 60 Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [oldnslo1] by ateixeira Sep 30, 2009 (11:52 am)
Replying to: oldnslo1 (Sep 29, 2009 10:27 pm) I seriously doubt it.   The 3.0l was the 1MZ, the 3.3l was the 3MZ. Those are probably related, and you MIGHT be able to swap them out.   The new 3.5l is a 2GR engine, totally different engine family.   It might be easier to drop in a Ford V8. Replies to this message: oldnslo1 (Oct 02, 2009 6:29 pm) ateixeira (Oct 05, 2009 11:17 am)
#55 of 60 Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [oldnslo1] by wwest Sep 30, 2009 (5:09 pm)
Replying to: oldnslo1 (Sep 29, 2009 10:27 pm) The problem might really be getting the new engine's control ECU to speak "english" to the "old" LAN, Local Area Network, especially the old transaxle.
#56 of 60 Any ideas? by kat2800 Oct 02, 2009 (12:47 pm)
I am having the same noise when I go between 50-65mph. If I take my foot off the pedal it stops immediately. Seems to be more when I am accelerating like on an incline or on ramp to the highway. I just bought this 07 LE 7pass Sienna - literally 48 hrs ago. I didn't drive it on an incline when I test drove it. Should I ask them to look at the heat shield and see if it is lose?
#57 of 60 Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [ateixeira] by oldnslo1 Oct 02, 2009 (6:29 pm)
Replying to: ateixeira (Sep 30, 2009 11:52 am) I'm glad it is only a rhetorical question--I'm hoping for a long life for this vehicle, which, so far, has been the best I've ever owned. From the looks of some of the posts here, my '01 might be better than a new version. Replies to this message: ateixeira (Oct 05, 2009 11:17 am)
#58 of 60 Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [oldnslo1] by ateixeira Oct 05, 2009 (11:17 am)
Replying to: oldnslo1 (Oct 02, 2009 6:29 pm) Nah, my 07 has been flawless. People seek out forums like this to complain, you always hear the worst-case scenarios.   How many people hop on the internet to say "no problem here" on their vans? Noone. Only existing members who subscribe to the threads already, and good samaratins trying to help.
#59 of 60 2010 1st oil change by islandvan Oct 20, 2009 (3:53 pm)
so i just passed 1,000 miles on my 2010 le and i am thinking of doing a quick oil change to get out " the fine bits"    when did you do your 1st oil change and did you take it to the dealer or your "local guy"?   did you use regular oil or synthetic and are you happy or do you wish you did the opposite?   thanks for your advice Replies to this message: ateixeira (Oct 23, 2009 9:23 am)
#60 of 60 Re: 2010 1st oil change [islandvan] by ateixeira Oct 23, 2009 (9:23 am)
Replying to: islandvan (Oct 20, 2009 3:53 pm) I did my first at 5k miles and the oil really wasn't that dirty. No metal shavings on the magnetic drain plug, either.   I'm using regular dino oil, thin stuff - I think 5w20.

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