I have a 2008 JKUR and the other day I started to hear this tinny, almost like metal on metal, sound coming from the front of the vehicle only when I accelerated. I decided to try and rule out various systems like the suspension and drivetrain by setting my car in park and revving the engine. It was there when I did that as well, so that told me it’s most likely the engine. I’ve attached a video with the noise (sorry for the wind). Any ideas?

video:

 

Try having someone rev the engine while you record that sound from in front, hood up. Maybe you'll be able to narrow down the general area (front of engine, driver, or passenger side), that will help us help you better.

 

There is a heat shield on your exhaust system crossover. Check and see if any of the welds are broken. VERY common problem.

 

Thanks guys so far!

The sound is definitley coming from more underneith the car. In front! Almost directly under the motor what it sounds like.

Couldnt check any more right now. - But is there any chance you could guide even easier how/where to check for those welds? Sounds pretty hopeful, really hoping for that that’s where the sound is coming from.

i have been driving with this sound for 50000 km.

 

Three years to get back? LOL. I'll shoot a photo of the welds later this morning; it's 3 a.m. right now. Guess you can wait until after sunrise!

 

Actually I was meant to post this in the topic just above this one.
So if you dont want to, no need to spend to much sweat taking Photos.

my car is a JL.
and its probably not the heat shield.
Might be flex-plate or starter motor gear problem is what I’ve heard so far.

/Sweden

 

Understand. And I forgot yesterday to shoot that photo. Guess no point to apologizing, but I apologize anyway.

 

Photo, just in case someone finds this thread and could use it. This is on the 3.8L motors (the 3.6L motor in my Gladiator is much smaller and different). Note that I replaced my cats a few years ago with an OEM one and the new one has straps around the two outer welds that presumably will reinforce the weld and prevent breakage.