Last post on Aug 20, 2012 at 12:26 PM
You are in the Toyota Sienna
What is this discussion about?
Toyota Sienna, Engine, Van
#7 of 10 Re: Sienna engine rattle [ateixeira]
Nov 23, 2011 (2:46 pm)
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]
Nov 24, 2011 (9:58 am)
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]
May 10, 2012 (8:31 am)
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]
Aug 20, 2012 (12:26 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!