Exhaust Rattle leads to replacing a turbo????

[Big Ratt]

I’m totally on the same page if it’s actually a turbo issue needing to be taken care of. My issue is the reputation of my local dealer that is Auto Nation. My pops is an auto mechanic of 25 years and has no faith in the dealer. He has been working on the ecoboost for years. He’s not liking the explanation of a vibration breaking spot welds in the rear muffler. I have an appointment Thursday at another Ford to look at it. If they come up with a turbo issue I will defiantly take care of it.

---------- Post added at 09:30 AM ---------- Previous post was at 09:23 AM ----------

Can you describe the sound a little more?

I have something similar I'm trying to narrow down without going to the dealer.

I'm getting it from the front drivers side. Only happens under mid load and around the 2k rpm mark. It does sound like something internal to the exhaust system.

I do have SW downpipes and considering removing them to see if it fixes the problem.

Sound is a very low RPM. Mostly when coming to a stop or driving slow through a parking lot.

https://m.youtube.com/watch?v=0PvkVrrXQR8

 

[Glamisfan]

as guys who dont work on cars, you are all really cracking me up, you must think you are el doctors too.
an out of balance turbine can absolutely cause the issues you are describing, not only that but it can also potentially destroy your trucks engine should the turbine grenade while driving.

back seat diagnosing mechanics crack my shit up, if you dont like what they say or what they tell you then fix it yourself lol.

Ok mister obviously ASE certified mechanic, despite saying your job is IT.................Since you sound like you’ve seen this same situation where a loose turbo shaft causes a rattle in the muffler, could you please explain what exactly happens to cause the rattle? Cause I’m always open to learn something new.

 

[k-rub]

Ok that's much different than mine. Mine is less metallic than that.

Thanks for the clip.

 

[AndysLog]

Ok mister obviously ASE certified mechanic, despite saying your job is IT.................Since you sound like you’ve seen this same situation where a loose turbo shaft causes a rattle in the muffler, could you please explain what exactly happens to cause the rattle? Cause I’m always open to learn something new.

you can get an ASE cert without ever touching a vehicle FYI. any number of things can happen with a less than perfect balanced turbo. they spin at an extremely high RPM and can easily grenade the fans on either side and enter your engine like your ex on prom night.

the unbalanced turbo has enough vibrations in it to reverb onto other parts, its not really rocket science.

my opening statement wasnt really trying to ruffle feathers so sorry if i did so, my point is you clearly have no clue whats going on with your turbo engine thats why you took it in lol. its not a knock, its just not your wheelhouse. i have just over 10 years of real world mechanics experience, engine swaps/rebuilds/axles/brakes/yada you name it, been involved with a little bit of everything from drag/drift/autox/offroading. i dont do any fabwork (cagebuilding) (tube fronts/rears), but my brain is full of broken knuckle memories and hours upon hours of troubleshooting/diagnosing/fixing, but what do I know lol.

you may be right that a new turba wont fix the current problem. you also have to consider that the noise you are hearing is not the problem, but simply a symptom.

 

[k-rub]

You could ask the dealership if they actually pulled off the downpipes and examined the turbo shaft vs making an educated guess.

I pulled mine off and there was zero play and they were solid. Although the wastegastes on both sides were loose AF.

 

[AndysLog]

how did you test play? please dont reply with "i used my finger back and forth and it didnt move"

also, with 3.5 ecoboost motor being a pretty large staple for ford now, i bet they are getting some good documented breaks/fixes going on. maybe that this issue is super common to them.

 

[smurfslayer]

I’m totally on the same page if it’s actually a turbo issue needing to be taken care of. My issue is the reputation of my local dealer that is Auto Nation. My pops is an auto mechanic of 25 years and has no faith in the dealer. He has been working on the ecoboost for years. He’s not liking the explanation of a vibration breaking spot welds in the rear muffler. I have an appointment Thursday at another Ford to look at it. If they come up with a turbo issue I will defiantly take care of it.

---------- Post added at 09:30 AM ---------- Previous post was at 09:23 AM ----------





Sound is a very low RPM. Mostly when coming to a stop or driving slow through a parking lot.

https://m.youtube.com/watch?v=0PvkVrrXQR8

Holy cr@p that ain’t right.

many, many moons ago I had a truck that developed a rhythmic knocking sound. I swore it went up and down with RPMs; it kind of did, it went up and down with vehicle speed, but I was dreading the diagnosis because it sounded awfully bad and very similar to the death knock one of my big blocks made when I threw a rod bearing and grooved the crank.

I took it to local and very savvy GM guy now working in private shop. He had the truck on a lift, test drove it, back on the lift, test drove it again grabbed me and we both test drove it and he looks at me and says, I believe you, I hear it and feel it through the truck, but it’s not engine. I protested and he showed me - he says ‘I have to go pretty hard on the gas / brakes to show you’ - I said no prob., do it. He floors it, holds it a few seconds then panic stops it and you could feel the knock after the engine rpms fell to idle. proving it wasn’t engine.

He lifts it again, holds a team meeting with his peeps, they all start poking and prodding, next I hear - “AHA!”

pulls me into the shop and proudly illustrates - broken transmission mount; the x-member was being torqued and basically rattling in a cycle.

When you’re running down a problem, avoid predetermining what the problem is. This is the hallmark of the user formerly known as sasquatch77, it’s called confirmation bias.

I’m not ruling in or out what your issue is, that’s for the pros to do. I’m just suggesting that once you get the 2nd opinion, if it matches, maybe you let the warranty do its thing.

 

[Mcnawsty]

Listening to the sound, it is definitely not a muffler.

 

[troverman]

First thing I would check are all the exhaust hangers. In the video, it sounds like metal is contacting metal. It could be the hanger or some portion of the exhaust system making contact with the metal exhaust mounts.

Alternately, it could be the turbo is somewhat balanced under load, but as it spins down the turbine wheels are making contact with the housing. I would think the turbine blades would rapidly break off in this scenario, but maybe it is a very light touch.

Exhaust systems definitely vibrate and shake differently at different engine speeds and loads.

 

[df4801]

Listening to the sound, it is definitely not a muffler.

Reading any post from you Mcnawsty (Sasquatch, aka ecoboost troll), it is definitely not whatever you said.