TSB updated to add the typewriter tick on the 2024 models

[thelostone]

Now it’s updated ..bringing it into the dealership won’t help ..they will do nothing

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[Sf22giants]

It'd be cool if Ford could identify precisely what is causing the tick versus just stating that it's nothing to worry about.

 

[jimbo67]

It seems random, my 2015 had the tick my 2024 doesn't I'm at 5200 miles and 2 oil changes.

 

[TUnica]

Ours just stated yesterday at 1100 mile after the first oil change

 

[Q6543]

The direct injectors make a typewriter tick/noise.

it’s a 500HP NA engine…. She gonna make some sounds.

 

[kenkroop]

The coyote has 8 cylinders ,4 cams, 32 valves, 16 fuel injectors,2 timing chains and a mechanical fuel pump for d.i. I think it might tick or rattle a bit.

 

[Sf22giants]

I don't mind noise... I just want to know what is making the noise and why.

All of my Fox body Mustangs made a ton of noise from vibrations, rattling, etc. and I (eventually) knew what caused all of them. For example, the most common under-hood noise during idle, for many Fox's, was the lifters/rockers. Push rod engines are mechanically loud because of the cam > lifter > pushrod > rocker arm > valve spring > valve interaction. With aluminum heads, in particular, the sound was much more noticeable at idle, with the hood open.

So I understood why these cars make certain noises but that is the key; understanding why.

 

[Zig]

Having thought about this a little more...

If they are getting excessive lash adjuster leak down it's unlikely to cause an issue at low engine speeds.

In basic terms valve seating velocity becomes an nvh issue long before it becomes a mechanical issue and at low engine speeds the valve is never really going fast enough to be a mechanical issue even without a closing ramp

As long as the tick goes away by 2000rpm ish it shouldn't be an issue (depends on cam profile design)

As a rule of thumb valves are designed to seat at 0.1m/s but are typically in the range of 0.2 to 0.4
The nvh 'limit' is 0.5m/s, the continuous mechanical limit is 1m/s with an instantaneous peak of 2m/s.
Any higher or longer and valve seat damage is likely.

I'll have a look later to see if I can make an audio clip of an engine with excessive closing velocity to see if it sounds the same.

For reference I'm a variable valvetrain test and validation engineer for a consultancy firm (formally r&d of a tier 1 supplier)

If you YouTube flexvalve or duocam you should find the things we do

Is the sound more perceptible top or bottom end. I think i thought the tsb with sound clip indicated lower end.

 

[Zig]

There was suggestions of fuel injectors ? they're top end as well but highly unlikely to be influenced by an oil change / oil additive. Where as lash adjuster leak down will be.

https://www.mustang7g.com/forums/threads/tsbs-ssms-and-recalls-for-the-24-mustang.157809/

16. 3/6/24 - 52334 - "Tick Tap And/Or Typewriter Noise At Idle - Workshop Manual (WSM) Update"

 

[Upacurb]

What’s crazy to me is that the Coyote in my truck and the Coyote in my old 19 S550 make all sorts of noise and ticks … but my Voodoo which according to some is supposed to rattle itself apart according to some makes none of these noises

 

[Kitulu]

The direct injectors make a typewriter tick/noise.

it’s a 500HP NA engine…. She gonna make some sounds.

My old Ford Edge, and my Mercury Grand Marquis, used to have lifter tick on startup. At this point, I think it is just a Ford thing, you know, like Harley-Davidsons leaking oil...

 

[GrabThatBlue]

I still have 600km on the dash.
Curious If I get the tick after the oil change in a couple of months.

 

[Q6543]

My tick came after my 2nd oil change, but it’s a pain to even try and hear, you have to put the car in quiet mode, let it idle down and lean forward with the windows rolled down in park, next to a wall… and when the wind stops blowing and no birds chirp… then you can faintly hear it audible

 

[schmeky7]

I live in a hot climate. I have used full synthetic 10W-40 since my first oil change and at 33K+ miles my 5.0 purrs and makes no perceptible mechanical noise of any kind.

100% tick free.

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