Coming up with a plan to deaden the rear extractor/build other buffered acoustic channels to feed the tailgate.
BHPian wooka recently shared this with other enthusiasts.
To all those who, like me, are fed up with the noise coming from the tailgate – it’s the air extractor. I had issues with the snack tray and solved them with nitrile foam and some mounting pressure – however, a rattle at both low and high speeds and when operating the rear door persists.
I am spending quality time on this document – Linked here.
Coming up with a plan to deaden the rear extractor/build other buffered acoustic channels to feed the tailgate, and also cut down on reverb when the door is shut.
An excerpt: Current air extractors allow exterior road noise to the cabin, so it is required that the new prototype reduces or prevents the transmission of sound through the extractor. Preventing noise transmission will enhance the overall perception of vehicle quality.
The extractor on the Thar is poor- just hanging on the rear wheel and swinging your weight on it is enough to get it to rattle obnoxiously. This is compounded when using a wheel cover since it causes random turbulence.
The extractor is right by the outward panel behind the spare wheel mount.
Direct butyl sheet damping is not the solution as it’ll cause more issues with air pressure build-up as the vent will not do its job.
Here’s what BHPian dr_TJ had to say on the matter:
I do experience similar sort of rattles from the rear of my Thar. Tried to find the source of the rattle many times and with time, I have a strong doubt, that is was the Air Extractor on the tailgate.
Keyword: Finding a fix for the Mahindra Thar tailgate noise issue