So I'm no stranger to dealing with creaks and squeaks in my coupe, but I can't track down the source of my latest issue and am nearing my wits end.

My car is an 05 Coupe, 88k miles, around 65k I lowered it onto Swift Springs and Tokico HP shocks (all brand new).

The sound that I'm dealing with is best described as a creaking groan which emanates from inside of the driver's door, seemingly closer to the front of the car.

It only ever happens when I'm turning and never when going straight. It has happened both when turning left and when turning right, but not always- it seems to have something to do with the body flexing.

In an attempt to solve this on my own I have gone through the following steps, none of which have prevented the sound from occurring:

-Removed plastic door interior finisher
-Lubricated weatherstripping with gummi fledge, white lithium grease, and silicone spray lubricant (separate tests each)
-Tried all tests with windows up, down, and half way
-Unbolted (released any sort of tension) the metal panel covering the window regulator, also unbolted the window regulator and motor
-Lubricated door hinge (however it didn't even squeak from regular use to begin with)
-I have even taken turns (in controlled situations) with the door slightly ajar and fully ajar (ie: latch mechanism disengaged)

The latter steps were tests I ran to dispel any thoughts of the door itself flexing from chassis flex.

At this point I am out of ideas as to what could be causing the noise. It's irritating and happens often enough that I dread driving my car. I feel that short of completely removing my door I have eliminated the possibility of the sound coming from the door itself, and feel that the door must be acting as a speaker for wherever the sound is truly originating from.

Does anyone have any suggestions for where I should look next and what I should look for? I'm wondering if it could possibly be coming from my suspension, some parts that may have been swapped over from the factory setup, such as shock mounts?

Please help save my sanity!

 

Fixed it.... For the search engines sake here's how:

The noise was coming from the seat mounting bracket, and actually echoing off of the door- hence the confusion. One of the four bolts anchoring the seat to the chassis likely wasn't tight enough and would rub metal on metal during certain turns.

To stop the noise I placed adhesive vibration dampening foam under the anchor points of the seat where the holes in the carpet are. I then also covered the underside of the bolt washers with adhesive felt to prevent any metal on metal contact.

Sanity restored.