GT350 Exhaust Failure

[Cypherious]

Dealer is full of it saying it varies state to state, as you see above it’s a federal law.

good that they are reimbursing you !

To be determined Davesvt2000

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[Cypherious]

For those curious, here is your actual Emissions warranty. Got the car back today. Sun State Ford had it 2 weeks. I'm out $2 grand for the Ford Performance Borla catback. While it sounds great, it didn't fix shit. Car is still rattling away. Pissed off doesn't begin to describe I am about the situation. Is there not a garbage Ford Dealership in the metro Orlando area?

 

[Cypherious]

Oh and by the way, Ford Motor Company was a total fail. 5 Mustangs bought with the FoMoCo and after my experience this is my last. Time to go German.

 

[NoXiDe]

Side note, I'm surprised you can't return the exhaust to them for falsely diagnosing the vehicle. Can we hear an audio clip? I'm just as frustrated and I'm not in your shoes. Hate that you're going through this. I'm wondering what could be going on. Sounds like its not the exhaust and maybe the engine/transmission. Could be as easy as something may be loose. Is it a certain RPM range?

 

[Cypherious]

Side note, I'm surprised you can't return the exhaust to them for falsely diagnosing the vehicle. Can we hear an audio clip? I'm just as frustrated and I'm not in your shoes. Hate that you're going through this. I'm wondering what could be going on. Sounds like its not the exhaust and maybe the engine/transmission. Could be as easy as something may be loose. Is it a certain RPM range?

Higher the revs the louder the rattle. I personally think its the heat shield between the transmission and bell housing. I just drove up to North GA 600 miles and car ran great but was noisy as hell. Tomorrow I'm pulling out the creeper and jackstands & going to look for myself before heading to Deals Gap, NC on Sunday. Hopefully I find something.

 

[jvandy50]

Cats?

 

[Cypherious]

Cats?

Meow (yes)

 

[DCShelby]

If it’s the cats, get a rubber mallet and give them a few whacks and listen to see if you hear things loose inside it. The cylinder block plate issue I had, when warmed up I got the metallic trash bag sound in the wind at 3800 to 4200 rpm. 19 and up have the updated part with rubber backing on the plate.

 

[Cypherious]

If it’s the cats, get a rubber mallet and give them a few whacks and listen to see if you hear things loose inside it. The cylinder block plate issue I had, when warmed up I got the metallic trash bag sound in the wind at 3800 to 4200 rpm. 19 and up have the updated part with rubber backing on the plate.

I'm assuming the trans needs to come out to get to it?

 

[DCShelby]

Sure does. Or get some dynamatt and place some of it on the exposed part of the plate. That works too.

 

[NoXiDe]

Sure does. Or get some dynamatt and place some of it on the exposed part of the plate. That works too.

I don’t think he’s having THIS particular rattle. Wouldn’t he had it forever ago and noticed it? I just placed lead tape (Golfers tape) on mine to change the frequency and I can’t tell it’s there anymore.

I think something else is going on.

 

[UnhandledException]

62,000 miles on my 2017 GT350. No exhaust issues.

 

[Cypherious]

Got under the car while up at my parents place in Blue Ridge & found the problem in a few seconds. It was the loose counter weight on the catalytic converter assembly. At Autozone now picking up a couple supplies and should have confirmation shortly.

Btw... does anyone know the torque spec for this bolt?

 

[sox3]

Don't know if it has a torque spec. Guess you will be having a chat with that dealer?

 

[Lurker_350]

I looked through my shop manual and I wasn't able to find the specs for that piece. It had the cat removal/install, exhaust manifold removal/install (looked like a real pain!), but didn't mention the vibration damper. I figured it would have.

Maybe someone else with better manual searching skills will have better luck. Sorry.

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