- #48 of 63
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Re: Engine Noise in Cold Weather [rob105]
by zakki
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Jul 09, 2009 (7:55 pm)
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Replying to: rob105 (Feb 29, 2008 12:37 pm)
I have a 2007 Sienna with 49,000 Km, and have the same problem. Dealer said that the noise is due to a variable valve gear bolt being too close to the front engine cover and had agreed to replace the bolt with a updated one. Apparently, Toyota issued a TSB on this issue. My van is still at the dealership undergoing repair. Will let you know how the repair worked out.
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- #49 of 63
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Re: 04 Sienna LE Exhaust Heat Shield [da763]
by buckynix
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Jul 28, 2009 (4:38 pm)
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Replying to: da763 (Jun 15, 2009 12:21 pm)
Hi, We've got the same problem with the heatshield falling off into the fan on our 2004 Sienna LE. I'm wondering if anyone has removed this shield and if any issues were noted. I'm concerned about melting the fan blades. Please let me know if you've tried to run without it. Thanks.
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- #50 of 63
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Re: 04 Sienna LE Exhaust Heat Shield [da763]
by wr31
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Aug 20, 2009 (7:29 am)
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Replying to: da763 (Jun 15, 2009 12:21 pm)
I have the same car and had the exact same thing happen last week. I also removed the broken shield to eliminate the noise, but am interested in replacing it. Did you ever replace yoursn or find out if Toyota recalled the part?
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- #51 of 63
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Re: 04 Sienna LE Exhaust Heat Shield [buckynix]
by wr31
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Aug 20, 2009 (7:33 am)
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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?
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- #52 of 63
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Re: 04 Sienna LE Exhaust Heat Shield [wr31]
by da763
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Aug 20, 2009 (9:20 pm)
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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.
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- #53 of 63
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WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA?
by oldnslo1
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Sep 29, 2009 (10:27 pm)
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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?+
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- #54 of 63
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Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [oldnslo1]
by ateixeira
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Sep 30, 2009 (11:52 am)
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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.
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- #55 of 63
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Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [oldnslo1]
by wwest
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Sep 30, 2009 (5:09 pm)
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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.
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- #56 of 63
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Any ideas?
by kat2800
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Oct 02, 2009 (12:47 pm)
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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?
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- #57 of 63
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Re: WILL 3.5 REPLACE 3.0 IN '99-'03 SIENNA? [ateixeira]
by oldnslo1
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Oct 02, 2009 (6:29 pm)
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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.
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