Pardon the long thread, I'm trying to be as thorough as possible to help with possibly diagnosing the issues found/described - I figure y'all car guru's need more detail than less when trying to troubleshoot
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Maintenance History
Bought used in Summer 23 with 135k - Based on Carfax records, vehicle had routine maintenance. Nothing that stood out as major issue or red flags.
Current Mileage ~151K
Routine oil changes every 5k.
AC Evaporator Core Replaced ~135k
Tune up done ~137k
Water Pump and Thermostat ~151K (Current Matter)

Water pump Issue timeline - I describe sort of in diary form to give context to amount time that has passed between the described events.

Mon 3/17
About a week and a half ago I heard a dull like rattle, wasn't very noticeable but could hear it under the hood. I took dropped it off at the mechanic on 3/17 and picked it up Thursday, 3/20 in afternoon. Dull rattle gone, it was the water pump. Engine bay noise returned to normal. I didn't notice any odd sounds on the 10min drive home. Though given the conditions described below, its highly possible I didn't do what was needed to make the sound. I did notice the radiator fluid was changed out. It was initially green and but now was orange. When I first bought the pickup, I learned that the fluid is supposed to be orange for this year model but mine was green. Don't know how it was green but I was gonna change it to the orange fluid when I did a radiator flush at some point down the road.
I don't drive much or very far so I came home parked it for a couple days. I did cursory check under the hood just to quickly verify everything looked good, no red flags identified. I did not drive between 3/20 - 3/22.

Sat 3/22
I left to run some errands, and immediately noticed that when engine RPMs went above 2k rpm while boost was engaged, it made a sound like the sound you hear when using an air hose. Let off the accelerator and noise goes away. Accelerate normally, no air noise. I can replicate on demand when driving ~30-35mph and accelerate hard enough to engage boost to reach ~45mph. I have not driven on highway under high speeds. I suspect that given what I experience at low speeds, same would happen at high speeds. So I tried a few things, I revved engine past 2k rpms while in park, purs like a kitten. Sound good. Next I rev past 2k rpm while neutral, again sounds good.This air sound I can only replicate only while moving. If i accelerate and go past 2k and not engage the boost, normal engine sounds. But the minute I accelerate just enough to engage boost, it makes the air hose sound. I don't know a lot about engines but given the nature of the sounds it seems to be turbo related like an hose is loose or not connected? Question though here - Is there some relationship between the turbo and water pump to where when the replacing the water pump, something might happen to the turbo? So I noticed and did the tests described as I was leaving to run errands, it was late afternoon and mechanic was still open, so I took it by and talked to him about it - I replicated the noise and conditions as described with him in the vehicle. He didn't know what might be causing it right then but after talking with him, I arranged to bring it back on Monday 3/24 so he could dig further as it was basically closing time. I still had errands to run so at my first stop, I popped the hood to take a more detailed look and found-

Not sure if this metal piece was due to the repairs or something broke after I picked up the vehicle on 3/20. Its odd that the fragments are there. Perspective: This metal piece is sitting on a plate of sorts that under the engine, pic is slightly off center of vehicle.

More metal, again not sure if this was there when I picked up the vehicle or if this happened after I picked it up. Perspective: This is on the right side of engine looking down, you can see its slightly damp but also additional metal fragments. Didn't think too much of the dampness at the time, fragments do seem odd.

So I make note of what I see and finish my errands for the day.

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This morning, 3/23, I go to leave for one errand I had I noticed fluid on the ground in front of tire on passenger side -

Material is damp/wet - Feel it, doesn't seem oily per say can't really tell.

I touch the spot and attempt to smell/feel the liquid - No noticeable smell and doesn't seem to have an oily. The liquid from the spot and the feel of the material appear to be from the same source.

Will call this "Picture C" and will reference later in thread. Pay attention to red outline.

With seeing the liquid on the ground and seeing that the material very wet/damp, I check fluids and notice that the radiator fluid is significantly lower than what I initially checked a few days earlier.
In my experience, radiator fluid typically has a strong smell and noticeable but I could not pick up this smell when after try to feel the fluid in the wheel well and on the ground. Radiator fluid is orange so not sure if that has any effect on smell vs green fluid.

In looking in the same areas where I found metal fragments before, I noticed that the previously found fragments and dirt in area, had what seemed to be more damp/wet than previously, hard to say but it looks that way.

Same metal fragments on right side of engine but the next day.

Zoomed in of same metal fragment area



Zoomed out view - Only took this pic because the area dirt/liquid look fairly fresh and not dried. Maybe related to water pump, I don't know



Zoomed in - Unsure if this is related to what I previously have found.

Interesting fact - In "Picture C" after finishing errands this morning - the spot circled in red completely evaporated, no noticeable texture or residue as noticed previously. If that was radiator fluid, I don't think radiator fluid would evaporate completely would it? It should leave some sort of residue?

Thanks in advance if you made it to the end of this thread.

Any thoughts on what might be happening or has happened would be greatly appreciated.

 

I love this feature in the forum - After I posted my thread and it provided a related thread turns out its eerily close only difference is, what I described was after the water pump was replaced not before. https://www.f150forum.com/f38/what-s...3/#post6710814

Maybe this points to something with the new water pump being defective somehow? Doesn't describe any noises that sound like an "air hose" though, so still not sure how or if that is related.

After reading that thread, I took one of the suggestions and took a white napkin and pressed on the wet material inside the wheel well to see if I could pick up some sort of color on the napkin and nada. Just clear with no smell. Also spot on concrete in picture above, completely gone. So it seems water or some other non oily substance that can evaporate without any residue. Have no clue what that could be....besides water. I don't know what within the engine bay could expel this much clear liquid that evaporates without any residue or smell.

 

Your truck should have motorcraft yellow coolant. It originally came with orange, but orange was bad and causes problems. Ford revised to yellow, which looks green.
Those metal pieces look like hose clamps that were cut off during the repair. Or, if they are actually plastic, they could be the clips from inside the hose quick connectors that have to be broken to remove.
The fluid under the vehicle looks like washer fluid, from where it was under the truck and evaporation. Did they top that off and spill a little?
The other fluid stain was probably spilled coolant from the repair process.
It is common to have to top off coolant after a repair that involves draining coolant. Air pockets work their way out after running the engine up to temp several times. Keep an eye on that for several weeks though, to determine if there is actually a leak.

 

Appreciate the reply - A lot of what you said makes sense, especially the hose clamps. I feel a bit better knowing its not random fragments off of the water pump.

Regarding coolant color, it very well may be yellow and not orange hard to say especially when working with a discolored coolant reservoir. I wasn't aware there was a yellow version also so I will keep that in mind for the future.

Concerning the thought of washer fluid around the wheel well and on the concrete, I don't think its that as I did check the washer fluid and it appeared be at a level I would expect as I filled it not too long ago. Also the washer fluid I use is the green rain x and does have a smell to it.

I don't know they could have topped the washer fluid off and it still had leaked that much. Also very possible they used a different washer fluid and that's what I'm seeing somehow. Its just odd.
When I noticed the wheel well fluid "leaks" it was 3-4 days after the fact. There was no fluid on the ground between when I parked on Thursday through when I left to run errands on Sat late afternoon. Fluid only showed up on the concrete this morning. I don't know what that means or doesn't.

For the fluid in the engine bay area, it makes sense that it could be spilled coolant. As when I picked it up Thursday afternoon, I could smell the coolant. Though there must be also be coolant leak somewhere as the coolant levels are not where they were or should be. I can't smell coolant anymore at this point.


In my mind, I guess the main thing besides the potential coolant leak, then is what is making "air hose sound" when accelerating as described in the beginning of the post.

Do you have any thoughts on what might be making the "air hose" sound when the boost is engaged?

 

A couple comments. I have a 2013 Ecoboost and changed the water pump about 5 months ago. You have to remove a variety of hoses to get to the water pump. Those metal pieces look like the clamps that hold some of the hoses in place, especially on the thermostat housing which you have to remove to get to the water pump. Did your mechanic replace any of these hoses with brand new ones? If so, I agree with the previous post. They may have just cut the clamps apart to speed things up. If no new hoses they may have put a new clamp on and it would probably look a lot cleaner. So take a look and see.

The second comment is on fluid levels. I topped the antifreeze overflow reservoir up many times over the first couple weeks after changing the water pump. It wasn't empty but it would end up a 1/2 inch below the full line each of the first few days and then less so over time. I think I topped it up each of the first few days then every few days and then finally a tiny top up after a couple weeks. Been rock solid since then.

My truck had orange antifreeze, but now has the yellow. That's the newest formulation.

Regarding the air hose sound, I am not sure. I will say though that you have to remove a lot of the turbo air pipes that cross the front of the engine, even one going down to the intercooler to make if easy to get at the water pump. I wonder if one of them is not fully connected. On mine the one pipe going to the intercooler was not on all the way when I put it back on. The engine threw a code for low air pressure with the turbo (something like that) and I found the intercooler pipe was blown off it's fitting. Not because there was some damage. Just because I didn't have it all the way seated when I put the clip back in and the turbo air pressure pushed it back off. Maybe check all the clamps on the turbo piping, If one is loose maybe that is leaking air and making the "air hose" sound you hear.

 

Ya I’d bet on a piece of turbo piping being loose or possibly cracked just due to old age

 

Appreciate the reply - it provides great context to my issue. I feel this puzzle of mine is beginning to take shape. I forgot to mention in the original post, the mechanic also replaced the thermostat -

He did not charge for any hose replacement so I doubt that was done, though I'll check again to see if any hoses appear to be new. I periodically check under the hood to ensure things "look" normal and in the past, hoses from what I could tell, looked ok.

Both the original reply and yours regarding the clamps seem to line up. So I'm no longer concerned with the fragments I see.

For whatever reason, I didn't pick up on it from the first reply but after reading yours, it makes sense that the coolant "needs to settle" and the low coolant I'm seeing now is most likely just the air bubble being worked out and not actually a leak. If there was a coolant leak, I would think I would still smell something but I don't. So I don't feel this is an issue any longer. But as you and bjboertje mentioned, I will need to continue to monitor coolant levels until they stabilize.

Your comment about the sounds I hear when accelerating seems to confirm my initial suspicion of a hose or clamp being loose.

At this point, I'll just have to wait and have the mechanic see what he finds when I drop it off again tomorrow. My main purpose behind this thread was to help determine if something potentially had gone wrong or bad with the water pump replacement process or if some potentially irreparable damage had occurred.

I feel bit more at ease and educated on the issues described. Thanks to all for the detailed replies.

 

I agree with this. Another possibility is a broken exhaust manifold bolt.

 

So I heard just heard back from the mechanic and hes telling me its a bad turbo? He's backlogged for 2 weeks. He has another guy that rebuilds turbos but he's backlogged also. I guess to Ford it goes -

Any thoughts on the possibility its a bad turbo? And thoughts on using a rebuilt turbo or a new one? Should I replace both since I'm replacing one?

Scared to ask but whats the price tag for replacing one or both turbos?

 

i think id get a second opinion