NachoRunner601

Started on my way home after a spirited drive. I was in Sport mode, switching to another mode didn’t seem to alter/erase the noise.

Noise is definitely coming from the smaller box on the left (towards the center of the vehicle).

I’m going to try and get the dealership involved here in a moment (since it’s under warranything), but figured I’d check here to see if you guys new what the noise was and if there was a quick fix I could do.

thanks!!

991.2 Turbo

link to video I uploaded to YouTube:

Wujohn

If it is coming from the front of the car, look in the front part of the wheel well (will have to turn the wheel/get a flash light) - there is a fan there. Is something lodged in there that is hitting the fan?

NachoRunner601

thanks for the quick reply.

It’s coming from the front, drivers side of the vehicle. I checked out what you said and it’s 100% the fan, but there is nothing in there I can see hitting/blocking the fan. When I turned off the car it slowed down and kept making the noise albeit slower and slower ... almost like the fan motor or belt has an issue?

Wujohn

That plastic liner comes off pretty easy if you want to open it up to take a look. Check out this bumper removal thread for instructions.

https://rennlist.com/forums/991/1023...tallation.html

NachoRunner601

great find! Thanks Wujohn!

just spoke to my dealer - they said “it sounds like the radiator fan” (you were right wujohn) “those will stick from time to time, bring it in tomorrow and we’ll look it over”

NachoRunner601

In case you’re keeping score - the noise is actually able to be controlled by the a/c being turned on or off.

A/c on and noise is present.

A/c off and the noise goes away.

A/c Max and the noise comes on strong.

However...a/c Max AND sport mode - the car sounds like it’s about to take off the noise gets so loud.

BSO

There's very little clearance between the fan blades and the shroud, also the fender liner grille openings for the fan exhaust are louvered, with wide spaces between the slats.

The sticky tires will readily pick up road gravel and bounce it all over the fender well and some will end up caught in the shroud.

The amount of stuck road gravel I have removed just millimeters from the fan blades and stuck in the shroud was significant. Removing this accumulation has to be part of regular maintenance.

As above, its relatively easy to jack up the car, remove the wheel and plastic liner to get at the back of the fan.

NachoRunner601

at the dealership now and that’s 100% what has happened.

the tires threw a bunch of rock into and around the fan assembly causing the noise. They are removing it for me now however it will be something I keep up with in the future.

thanks!