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Toyota Sienna Engine Problems

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

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#31 of 60
Groaning by caravan2
Aug 15, 2007 (12:19 pm)
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I hear groaning around approximately 2k RPM? After that either it goes down or engine noise is so much, it seems it is lower....
 
Is this normal for Sienna?
#32 of 60
Re: Groaning [caravan2] by fccn75
Aug 16, 2007 (10:00 am)
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Replying to: caravan2 (Aug 15, 2007 12:19 pm)

Based on the comments I've read in this forum, this exhaust groan in that rpm range affects a few owners including myself.
 
Perhaps more will chime in regarding this noise. And hopefully with more comments comes recognition of this annoying sound so a technical service bulletin will be issued for additional sound/mechanical isolation requirements.
#33 of 60
Re: Groaning [fccn75] by caravan2
Aug 16, 2007 (5:26 pm)
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Replying to: fccn75 (Aug 16, 2007 10:00 am)

So, does it mean that some have it and some not?
 
I'm going to test drive a couple and see....
#34 of 60
Re: Groaning [caravan2] by ateixeira
Aug 17, 2007 (6:35 am)
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Replying to: caravan2 (Aug 16, 2007 5:26 pm)

While you do hear engine noise when you gun it, I'd still say the Sienna is probably the quietest vehicle I've ever owned.
 
Perhaps it's just that - road noise is very muted, so you hear more engine noise.
 
I say crank up the tunes! Nothing 100 decibels of DMB can't fix.
#35 of 60
Re: Groaning [ateixeira] by caravan2
Aug 17, 2007 (8:03 am)
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Replying to: ateixeira (Aug 17, 2007 6:35 am)

ateixera,
 
The noise does not bother me. If everyone is getting this, then this how is designed to work. I just wanted to know if my engine have problem.
#36 of 60
Re: Sienna Engine Booming sound [caravan2] by richw1
Aug 23, 2007 (7:37 pm)
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Replying to: caravan2 (Aug 17, 2007 8:03 am)

I was glad to hear the Sienna engine sounds I have noticed since the beginning are normal. I have a 2005 Sienna Limited and since the beginning, from the drivers seat only, between 2000 and 2500 RPM (where the engine lives most of the time!) the engine generates a sonorous booming sound. My wife doesn't notice it even while driving, and it is not nearly as pronounced on the passenger side. I have decided it is one thing I have to live with, but as one post said, the Odyssey, which we test drove, had a much better engine sound. The Sienna is a good reliable appliance for the family; noisy engine, lousy electric seat position/comfort for a taller person, awful stereo...but all that aside, a great family vehicle....
#37 of 60
Re: Sienna Engine Booming sound [richw1] by lweeks
Oct 03, 2007 (5:31 am)
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Replying to: richw1 (Aug 23, 2007 7:37 pm)

My symtoms exactly but never once warmed up. left over night 5 times they acknowledge the noise though. mechanic said there was a notice that it might be the injectors,& re- flashed the computer, it changed nothing, but now i get 10%better gas milage.they also changed the exhaust off motor, because the exhaust is double walled & may be seperating, still the same. Now with 96,000 kls on my 2004 sienna , I,m screwed lloyd
#38 of 60
enginenoise@2500rpm by lweeks
Oct 12, 2007 (5:39 am)
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#39 of 60
Toyota Sienna Check engine light by jjoseph2
Oct 23, 2007 (5:04 pm)
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I have a 2002 Sienna with 80,000 miles. Check engine light just came on .Any ideas?
#40 of 60
Re: Toyota Sienna Check engine light [jjoseph2] by ateixeira
Oct 24, 2007 (7:24 am)
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Replying to: jjoseph2 (Oct 23, 2007 5:04 pm)

Do you have an OBDII scanner? Maybe a friend has one?
 
The code will tell us more. Could be a loose gas cap, a bad 02 sensor, or something more serious.
 
I'm in the DC/MD area if you want to borrow mine.

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