5.0 idle sounds?

[SilverPigeon]

...Do you know why it quiets down after it's warmed up? What's changes?

Two things come to mind:
1. Just like in the old days when the carburettor had to be choked with a cold start, the same is true here: the system will command the engine to run rich for a while; rich engines always sound "throaty"
2. Presumably as part of point 1, the cam phasers will be commanded to change timing; this happens all the time in response to different situations. The phasers work best when warm, and it takes a while for warm oil to flow through them.

I have no empirical proof of the above, but researching the coyote (because I've ordered one) leads me to believe these things.

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[Rockman5159]

2021 5.0.

I love the truck, plenty of power, super-smooth ride, etc. But it seems to make a lot of funny noises while idling. Is this normal for this engine? I know of the 2021 5.0 changes compared to previous model years. Seems like it makes a lot of strange noises during the first 2-3 minutes after cold start.

Here is a video. Doesn't really capture the noise super-well but you can hear a distinct change around 0:05s in the video - it's pretty loud in person. (need speaker with a bit of bass to pick it up - cannot hear it on my chromebook, but I can hear it on my phone). Video below:

2021 5.0 cold start

thoughts?

Mine is the same. I dont think theres a problem just the nature of the beast

 

[Missmy3/4ton]

What brand fuel are you using? I noticed some of this (with intermittent rough idle) from switch from Costco brand to Sam club fuel.

 

[dave91gt]

OP- I finally found a video that sounds EXACTLY like my 21! It sounds horrible. dealer acknowledged the noise- hard to miss it. Ford customer care got involved and engineering felt it was my transmission. So last week I got a brand new transmission, torque converter, and cooler. Guess what? To my surprise it made zero difference. Nothing. Nada. It has to be something engine related. Once it warms a bit and idles down it’s silent. Runs crazy strong. But man is it embarrassing starting this truck next to my buddies GM and Rams. Cmon Ford- I’m at a crossroads of either throwing an exhaust on it or trading it. When I can hear that noise from across a parking lot on a remote start- it has me wondering If Ford overcomplicated the 5.0. My 2012 was quiet as is my sons 2011.

 

[jvbronco]

OP- I finally found a video that sounds EXACTLY like my 21! It sounds horrible. dealer acknowledged the noise- hard to miss it. Ford customer care got involved and engineering felt it was my transmission. So last week I got a brand new transmission, torque converter, and cooler. Guess what? To my surprise it made zero difference. Nothing. Nada. It has to be something engine related. Once it warms a bit and idles down it’s silent. Runs crazy strong. But man is it embarrassing starting this truck next to my buddies GM and Rams. Cmon Ford- I’m at a crossroads of either throwing an exhaust on it or trading it. When I can hear that noise from across a parking lot on a remote start- it has me wondering If Ford overcomplicated the 5.0. My 2012 was quiet as is my sons 2011.

Ouch. Sorry to hear you had to go through all that to troubleshoot without any luck.

Some replies in this thread have helped me learn to live with it (accept it). Appreciate the insight from everyone.

 

[9663mu]

The 5.0 is a dual overhead cam design. The gm has 1 cam

This is why the 5.0 makes much more power than the Chevy 5.3 or whatever it is. Can adjust timing on exhaust valves and intake seperatly, without having to change cams.

Plus 4 valves typically move more air than 2.

So your v8 has 3 more cams, and double the valves, rocker arms, etc.

More stuff. More power. More noise.

I’m not disputing what yours saying but that 5.3 has not been touched in almost 10 years now. Same power rating as the 2014 model that was out in late 2013. It will be interesting to see what GM does because it looks like the Ram is about to go turbo V6 like the Ford and Toyota. Regardless I would still get the 5.0 myself.

 

[dave91gt]

Ouch. Sorry to hear you had to go through all that to troubleshoot without any luck.

Some replies in this thread have helped me learn to live with it (accept it). Appreciate the insight from everyone.

Same. Well- actually I decided to relive my foxbody youth and throw a catback on the truck yesterday. I can say I can’t hear any idle noise now. Note to self: When the MBRP guy on YT says their 4” system is labeled as “race”, maybe he’s just being honest. I’ve got to say- I’m in love with the bass and thunder from the system. But it’s crazy loud in the truck. Cold starts though- wow

 

[jvbronco]

Same. Well- actually I decided to relive my foxbody youth and throw a catback on the truck yesterday. I can say I can’t hear any idle noise now. Note to self: When the MBRP guy on YT says their 4” system is labeled as “race”, maybe he’s just being honest. I’ve got to say- I’m in love with the bass and thunder from the system. But it’s crazy loud in the truck. Cold starts though- wow

sweet. Any videos by chance? I’d love to do something like this on mine.

 

[dave91gt]

sweet. Any videos by chance? I’d love to do something like this on mine.

I don’t- but go to https://www.mbrp.com/products/s5209409 to watch the 5.0 video portion and you’ll get the best sound. i tried on my iPhone but it doesn’t capture it. i bought that kit and it fit perfectly.

 

[Cordzi]

I have a really weird noise i just started noticing in my 22 5.0 f150 have no idea what it is only notice it while idling.
No loss of power and drives fine other than the rough transmission.

 

[Hockeymandan13]

Sounds the exact same as my 21 5.0. Just noisy engines. Generally speaking the 5.0 has been reliable and noisy all together. I'd let it ride.

Side note, take your truck in and have them do the SSM on the trans. Cleaned up my shifting alot.

I have a really weird noise i just started noticing in my 22 5.0 f150 have no idea what it is only notice it while idling.
No loss of power and drives fine other than the rough transmission.

 

[tony72cutlass's']

It amazes me that the computers in these engines cause it to idle funny. My 5.0 sounds like a city bus at idle. But then sings at higher RPM (like above 4K)

ive had plenty of v-8 engines over the years and both vehicles I currently own have 8 cylinders. The old one purrs like a kitten and the new one sounds like a bag of dog poop at idle, go figure lol

 

[diambo4life]

Extremely noisy. Wow.

 

[Cordzi]

Sounds the exact same as my 21 5.0. Just noisy engines. Generally speaking the 5.0 has been reliable and noisy all together. I'd let it ride.

Side note, take your truck in and have them do the SSM on the trans. Cleaned up my shifting alot.

thanks
It also makes this like whining noise ever since factory and i dont know what it is either the video couldnt capture it
Im just gonna take it in and see what they say

 

[tony72cutlass's']

thanks
It also makes this like whining noise ever since factory and i dont know what it is either the video couldnt capture it
Im just gonna take it in and see what they say

The whining is likely the transmission pump which I believe is typical for the 10r80

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