The sound lasts a few seconds, then goes away and doesn't. Plenty of youtube videos to watch on this topic. What you're hearing is most likely the vvt (variable valve timing) phasers chattering while oil pressure builds up — the phasers need pressurized oil to seat properly and thick cold oil.
Ford F-150 (2010-2024) Engine VVT Solenoid Replacement Guide | Go-Parts.com
This article will delve into the causes, common symptoms, and effective solutions for vvt solenoid issues, equipping enthusiasts and diyers with essential knowledge.
Can't say that i have heard rattling under the hood on startup, but i do hear a rattling sound from underneath the truck on startup
All i could think of was maybe some small bits in the. All motors have some rattling when cold started at/near/below 0 degrees c Warm it up, shut it off Let it set 10 minutes and restart it
Listen to see if you got the rattle back. I'm planning now that weather is getting nicer to get under the truck and have someone start it and hunt around The few people i've seen it seems to be something with the heat exchanger. Ignoring vvt rattle can lead to more serious engine problems, including poor fuel economy, increased emissions, and potential engine damage
Fortunately, many causes of vvt.
Ford’s 3.5 ecoboost has become well known for vct phaser issues Vct phaser cold start rattle is the number 1 issue with these engines In this video i break down everything you need to know. Rattling noise, sounds like marbles on cold starts help would be very much appreciated
I have a 2019 f150 5.0 , as of recent every cold start up has this rattle. I always had the infamous valve rattling at start up before changing it out. The rattle on cold start up means your timing phasers are on the way out You will need a full phaser and timing set replacement chains and guides
