Cold start sound

[KSC 2019 XLT]

Attaching audio recording. About 10 seconds in, engine will crank and rattles momentarily. The rattling sound lasts for no more than 2 seconds. Any idea what is the sound? Rattling sound occurs only on cold starts (overnight) and only on occasions and rattles for 2 seconds max. Even after cold start and then shut off after a few seconds and re-crank immediately, there is no rattling sound (engine should be still cold). It only rattles on the initial cold start. My first thought was the cam phasers but I thought that would mean it always rattles on cold starts but mine only happens on occasions.

Truck is a 2019 Ford Expedition XLT mfg date Aug 2019. Approx 68,500 miles. Purchased new and I bought the Ford Premium CARE extended warranty plan. Trying to troubleshoot before I bring the Expy into the dealership (or if I need to) as the last time I brought it in for something else (AC) they kept it for 3 weeks (they did provide me a free loaner). Thanks so much for any information you guys can provide.

 

[Ugh_J]

I don't see an attachment but one of the signature sounds of the cam phaser issue is rattle for about 1 second on cold start. https://www.youtube.com/shorts/znDJeyoefJI is an example.

Also, I've heard you can mitigate the cam phaser rattle by holding brake+gas pedals down, crank for several seconds, then release gas pedal. That will circulate oil up there before the start and should result in the rattle not happening. Good luck!

 

[LegalBrief]

It’s under warranty.. take it in let them go to town.. it’s fee free