2005 Ford Escape 3.0 rattling noise on start up ???

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Hey everyone my grandma has a 2005 Ford escape limited with the 3.0 v6 when you start it up it makes a weird rattling noise at the front of the car I have no idea what could be causing this it runs and drives perfect always had 5k oil changes only 105k miles and it's made the weird rattling noise for over a year.. just wondering if it's serious or what it might be? Thank you!

 

[Mbrooks420]

Usually a rattle at startup is a timing chain that’s too loose. Often, if it fails it kills the motor. I’m pretty sure those are interference motors.

 

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Usually a rattle at startup is a timing chain that’s too loose. Often, if it fails it kills the motor. I’m pretty sure those are interference motors.

Is there a way to check for sure that it's the timing chain?