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Toyota Sequoia Maintenance and Repair
Well I hate to say it but it's PISTON SLAP and Toyota knows it. It looks like tloughr was right. I forget where all of the previous discussions ended but here is what I have found out (from a Toyota service rep).
The pistons on the V8 engines have tolerance problems than can lead to piston slap depending on how much
the tolerance is off. A TSB has not been generated yet but I hate to think of what a TSB for piston problems
might say. I don't like the idea of paying $40k+ only to find out that Toyota wants to fix a prevoiusly known
problem by having to rebuild my engine.
I have heard about some engines that are very loud when first started but quiet down once warmed up. I'm not
sure what the definition of quiet is but this is the scenario that Toyota is looking in to.
My noise is not quite so severe. It's an annoying tick that seems to be related to outside temperature and not
engine temperature. Does anyone know if the computer changes any of the engine settings based on outside
air temperature? Does anyone else have this symptom?
It appears that this V8 engine has four versions:
1 - quiet
2 - ticker (fuel injectors)
3 - tapper (?)
4 - knocker (pistons)
Are others hearing these noises or am I the exception?