Last post on Jan 03, 2013 at 8:02 AM
You are in the Toyota Sienna
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Toyota Sienna, Van
#39 of 79 Re: 2007 sienna - loud hum noise when accelerating [skevin]
Jul 31, 2009 (6:54 am)
I too have 2000 sienna and it also started making the same " leaking compressed air sound " few days ago. I haven't taken it in yet, but am wondering how you made out ? Any help would be greatly appreciated !
#40 of 79 Re: 2007 sienna - loud hum noise when accelerating [jtoy]
Jul 31, 2009 (7:01 pm)
I will be taking it to a mechanic next Tuesday so good or bad I should know soon. When I mentioned the problem to the mechanic (he is a certified Honda Mechanic) he thought based on what I described he said it might be an engine misfire, although the OBD II does not indicate such. I should mention my van makes the noise between 2000 and 2300 rpm. I will update next week.
#41 of 79 Re: 2007 sienna - loud hum noise when accelerating [skevin]
Aug 01, 2009 (3:35 pm)
I took my van to a mechanic and he determined that it was a loose heat shield by the cat converter. A simple gear clamp wrapped around it and tightened fixed the problem. To find out if it's the same problem, tap your rear exhaust tip with your hand (after it's cooled) and if you hear a bumping noise that's the problem. You might need someone else to tap it as you listen for it up front.
He charged me $20 bucks and I haven't heard the noise since.
Good luck with yours. Keep me updated.
#42 of 79 Re: 2007 sienna - loud hum noise when accelerating [jtoy]
Aug 05, 2009 (3:00 pm)
Just a quick update, the noise was from the shield that is near the flexible Y pipes which are up close to the engine, the shield was vibrating and causing the noise. Hope this helps, another place to look to resolve the problem.
#43 of 79 Re: 2007 sienna - loud hum noise when accelerating [jtoy]
Aug 06, 2009 (8:15 am)
Gotta love any $20 fix in this day and age.
#44 of 79 Front end noise over 10mph
Aug 15, 2009 (9:00 am)
We have a 2004 Sienna. The van shifts well, and it is not the exhaust. It sounds like a loud revving at all speeds over 10 mph. But the trans shifts fine. If we get up to speed and put it in neutral, the noise is still there. Any ideas?
#45 of 79 Re: Front end noise over 10mph [prillb]
Aug 15, 2009 (2:45 pm)
I would check out the heat shield on the cat or the heat shield by the Y pipe up near the engine(my exhaust system had this but it was an after market) If the heat shield is loose an cant be fixed, remove it but don't park in long dry grass.
#46 of 79 Re: 2007 sienna - loud hum noise when accelerating [omle]
Mar 13, 2010 (7:59 pm)
I know this is a 3 year old post but i am having the same issue, has any of you got the same problem? if so, what was the fix?
this is driving me crazy...
#47 of 79 sound like revolving fan blades hitting some obstacle
Apr 16, 2010 (12:43 pm)
I recently bought a used 2007 Sienna LE. Since the first day I drove the car home, after I stop and park the car, I hear a metal clanking noise from the hood, it sounds like revolving fan blades hitting some obstacle, the noise subsides gradually. I took the car to the dealer and the mechanics concluded the noise to be "normal" ... is it so? Please help!
#48 of 79 Re: sound like revolving fan blades hitting some obstacle [sagars]
Apr 19, 2010 (9:45 am)
You sure it's not the popping sound caused by contracting metals as they cool? Most cars I've had did that to some extent.