Ruido raro en automatico

[juanls]

Tengo mi corolla automatico, hace casi una semana, es xei 2007. Hace 2 dias empese a notar un prrr suabesito, cuando acelero en baja y el auto lo hace durante 2 segundos aproximadamente hasta que cambia el cambio, tiene 85 mil km, todos los services en concesionaria, y me comunique con el anterior dueño que es un conocido, y me dijo que nunca lo habia escuchado, es como si quedara patinando el embrage hasta que hace el cambio.??????

Todavia no fui a la concesionaria que lo compre (es el concesionario oficial toyota de santa rosa, la pampa)

Alguien sabe que es? Quiero ir con una idea mas o menos a la concesionaria para que no me metan el perro.

Saludos

[juanls]

Luego de ir 3 veces al concesionario, pudieron descubrir que es. Me dijieron que hay algo flojo en la tapa de admisión, pero que como eso va sellado no se puede reparar, es decir que hay que cambiarla, sale $900, estoy peleando para que me lo hagan, ya que al segundo dia (200km) desde que lo compre ahí me lo empesó a hacer.
Es el único consecionario oficial toyota de la provincia, pero hay un taller especializado en toyota desde hace varios años, y conosco al mecánico, se lo voy a llevar para que me diga que hacer, y ver que no me estén matando en la toyota con el precio.
No es urgente me dijieron que no puede tener grandes consecuencias, pero estoy bastante embroncado, no con lel auto, sino con toyota Bhassa.

Saludos

[Nestor FM]

Podría ser esto; lamento que esté en inglés, pero puede darte una idea.

Saludos
NFM

Rattling noise in Toyota Corolla intake manifold solved
I have a 2002 Toyota Corolla that developed a vibration noise. I searched the net and found that this is a factory design defect and that similar Toyota cars (Camry, 2002 and 2003) have the same problem. The intake manifold has a chamber partitioned with a baffle. This baffle is glued into place and the air vortices in the manifold apparently weaken the bond so the whole thing starts to rattle against the walls of the chamber. The solution is to affix the loose baffle and so stop it to vibrate. The procedure is described on the Topix forum and since it didn’t look too complicated I tried it myself.
The engine I worked on (with a lot of help from my father) is 3ZZ-FE, but I think intake manifolds from other Toyota models look the same or are indeed the same part as mine. The first thing to do, was to pull the intake manifold off the engine. In my case all the screws and bolts were accessible from above but some people report you have to get to one or two screws from below. I guess it depends on the engine model. I had to dismount some rubber tubes and a big air hose coming from the air filter.
The tricky part came next. I didn’t know exactly how the baffle looks inside the manifold so I spent the next hour or two to analyze the whole thing. I slowly built a mental image of what is inside and was just about to give up when it all came together. You have to look trough the big hole (where the throttle body is normally attached) but diagonally across it. You will see very little of the inside of the manifold chamber but you’ll be able to glimpse the edge of the baffle.
The next step was pretty straightforward. We found a good spot to drill a 3 mm hole. We could feel the drill go trough the outer wall of the manifold and then trough the baffle. A 3 cm sheet metal screw (with stem diameter of 3 mm) was carefully screwed in and that’s it! I think a shorter screw would work as well.

The hole was drilled at approximately 45 deg. angle.
Reassembly was quite quick and I impatiently started the engine. The noise was gone, although further driving revealed maybe a very narrow range of engine revolutions where the resonance is apparently too strong for the screw to muffle it. If perhaps I could use another one on the opposite side (the bottom of the first picture) the result would be better. But then I would have to drill trough one of the intake tubes which I didn’t want to.





a replacement part is $300,
having a non-dealer replace it