Toyota Fortuner 2018 V... Rattle or Vibration Sound

[hack3t]

Did they replace any of the pulleys, at all? Particularly the alternator pulley? How about the belt tensioner?

Have you ruled out belt flapping?

Not yet.. I haven't been to any shops this past few months. and since I am at 71+++ I plan to do EGR cleaning and then change the old Coolant back. But I think I saw a comment that the thermostat will not be an issue because it will be clamped so if the rubber gasket is brittle etc you will find a leak but no leak so I think that the thermostat is okay but changing the Coolant as part of my 80K heavy PMS would be ideal. Let them check the alternator pulley, belt tensioner, or along that area. Thank you

[hack3t]

i agree with the resonance.
now, the problem is zero-ing in on the source. knowing the approximate location helps.
i would make large effort to go over the entire vehicle, perhaps even have the car lifted at the gas station so's i can get a better look at the underside.
i would go over the engine bay, looking for loose parts.

in my innova, i twice had two strange sounds.
the first, was traced to air cleaner spring clips that i forgot to re-clip on.
the second, was traced to my lower glove compartment cover; when i removed it to service my aircon filter, the felt dampeners on the swivel joints fell of.

Thanks! I'm Planning to have another round of under-chassis checks since I have had one before but no luck.

[hack3t]

I don't think its the coolant or thermostat. Meron nausog/nagalaw yan during the service na tinatamaan ngayon or as someone stated above a belt or pulley na pabigay na pero ngayon lang lumabas ang issue.

Yun din bigla kong naisip nung nanood ako youtube sir kasi nakaipit nga pala ung thermostat... hirap hanapin.. mag 1 year na LOL! pero pag driving ka naman na hindi ka naka AC tapois below 1800 rpm ka lang d naman lumalabas.. pero nakakarindi pa rin kasi lalo na Baguio ako dami paakyat so lalabas at lalabas siya.. pa check ko ung mga belt pulley etc... hoping na sana may nagalaw lang or un nga tumatalon na belt sa underload etc.. Thank you

[pjbg]

My new fortuner GRS 2023 suffered the same rattles. After thorough investigation, the heater core have a technical service bulletin in another country.

Here it is for your reference, if our problems are the same.

Service Bulletin From Online Forum, Dashboard Rattle, Heater Core Issue, Toyota, Fortuner, Hilux, Fortuner Rattles, Hilux Rattles | PDF


Hope this helps.