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Sienna engine rattle

10 messages,  Last post on Aug 20, 2012 at 1:26 PM

You are in the Toyota Sienna Forum.

What is this discussion about? Toyota Sienna, Engine, Van

Messages Page 2 of 2

#6 of 10 Re: Sienna engine rattle [capitalfederal] by ateixeira

Nov 10, 2010 (7:47 am)

Replying to: capitalfederal (Nov 09, 2010 10:43 pm)
One difference I can think of is that Avalon probably had a timing belt, which is certainly quieter than a timing chain.
 
Toyota added some sound insulation to the firewall the year they switched to a timing chain (model year 2007 on the Sienna) to compensate somewhat.
 
I wonder if the new van has less insulation? Automakers try to save on weight and cost all the time.

#7 of 10 Re: Sienna engine rattle [ateixeira] by capitalfederal

Nov 23, 2011 (3:46 pm)

Replying to: ateixeira (Nov 10, 2010 7:47 am)
Unfortunatlly Toyota tech representative has told me that the rattle is caused by PISTON SLAP and that this is normal. Who are they kiding. Piston slap is a serious problem and it will cause a problem for me in the future. Wow how Toyota has gone down in quality.

#8 of 10 Re: Sienna engine rattle [capitalfederal] by fibber2

Nov 24, 2011 (10:58 am)

Replying to: capitalfederal (Nov 23, 2011 3:46 pm)
Those of us who also own Subaru vehicles are well acquainted with piston slap. A number of other high performance engines (like that in the Corvette) also suffer from it. Shortening the piston skirt makes them prone to rattling around in the bore until they expand enough to ride straight.
 
My '08 Sienna does it when cold, but it quiets down within a few minutes. I don't like the fact that some do it, and others don't, but I'm willing to accept that any potential damage to the bore or rings probably won't be significant until after a few hundred thousand miles down the road.
 
If it doesn't go away when warm, then you have legitimate cause for concern.
 
Net - turn up the radio until the engine warms up and try to ignore it.

#9 of 10 Re: Sienna engine rattle [capitalfederal] by kitcloudkick3r

May 10, 2012 (9:31 am)

Replying to: capitalfederal (Oct 29, 2010 1:00 pm)
Had this issue, are you sure you didn't or aren't using a poor quality fuel? This happens when i use cheap gas.. or when they change to the winter blend in the north east, then i need to run mid-grade..

#10 of 10 Re: Sienna engine rattle [capitalfederal] by 4grandsons

Aug 20, 2012 (1:26 pm)

Replying to: capitalfederal (Oct 29, 2010 1:00 pm)
This is not normal! Search for technical service bulletin T-SB-0094-09, which defines the problem. Our 2010 Sienna XLE is showing the same behavior and we had the check engine, VSC, and Trac Off lights all come on last weekend. We had the diagnostic code read and it was "P0015 - Camshaft position “B” – Timing over-retarded (Bank 1)." If your powertrain warranty expires this could be an expensive repair!

Messages Page 2 of 2

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