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F-Type rear diffuser melted - exhaust too hot?

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Old 10-07-2018, 03:17 PM
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Default F-Type rear diffuser melted - exhaust too hot?

Just noticed this today on my F-Type

Looks like the heat from the exhaust may have melted the area right above the tips, loosening the adhesive?

Any ideas on a good way to fix this? I'm in the Bay Area if that makes any difference


 
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Old 10-07-2018, 05:26 PM
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I would take it to the dealer. Have you done any modifications to the vehicle which you believe would cause this? Any recent rear bumper adjustments?
 
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Old 10-07-2018, 06:11 PM
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Originally Posted by Jst2gtby
I would take it to the dealer. Have you done any modifications to the vehicle which you believe would cause this? Any recent rear bumper adjustments?
Nope, the car is 100% stock. Think this would be covered under the new car warranty?
 
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Old 10-07-2018, 06:24 PM
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I can't see why it wouldn't be.
 
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Old 10-07-2018, 07:27 PM
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No adhesives in that area, only snap tabs. Valence or bumper could have been tapped by another car.
 
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Old 10-07-2018, 09:04 PM
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Originally Posted by Unhingd
No adhesives in that area, only snap tabs. Valence or bumper could have been tapped by another car.
Oh, I see. Hmm, there's no signs of any marks or scratches on the bumper, though if a car slowly pressed on it, that could have broken the snap tabs. We'll see what the dealer says
 
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Old 10-07-2018, 11:58 PM
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Abnormally hot exhaust could be a sign of oil burning.
 
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Old 10-08-2018, 08:20 AM
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Originally Posted by SinF
Abnormally hot exhaust could be a sign of oil burning.
I don't think the area around the pipes is sufficiently sooted to indicate burning oil (though, the area may have been recently cleaned).
 
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Old 10-08-2018, 12:29 PM
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Originally Posted by Unhingd
I don't think the area around the pipes is sufficiently sooted to indicate burning oil (though, the area may have been recently cleaned).
Yeah, the picture is right after I did a car wash. Typically, the area around the tailpipes has a bit of black soot on it. I assumed it's pretty normal, though, since it sounds like most other people see the same thing on this car.
 
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Old 10-08-2018, 06:59 PM
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Originally Posted by saturdays
Yeah, the picture is right after I did a car wash. Typically, the area around the tailpipes has a bit of black soot on it. I assumed it's pretty normal, though, since it sounds like most other people see the same thing on this car.
I think so. When I still had the two trumpet exhaust tips, they were always sooting up quickly. I never noticed it much on the rear valence itself, as that is matte black.
 
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Old 10-10-2018, 02:04 PM
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That looks like two pieces, gloss black and body color, where there is only one on mine, all gloss black. I suspect physical damage, as has been suggested, or a possible workmanship defect.
 
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Old 10-10-2018, 03:25 PM
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Originally Posted by lizzardo
That looks like two pieces, gloss black and body color, where there is only one on mine, all gloss black. I suspect physical damage, as has been suggested, or a possible workmanship defect.
I believe the valence is slightly different on newer vehicles. One piece on ours and two piece on the newer ones.

 
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Old 10-10-2018, 03:30 PM
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Originally Posted by lizzardo
That looks like two pieces, gloss black and body color, where there is only one on mine, all gloss black. I suspect physical damage, as has been suggested, or a possible workmanship defect.
Of course I had to look at mine and it's one piece matte black.
 
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Old 10-10-2018, 03:39 PM
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Saturdays, is yours an MY19?
 
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Old 06-13-2020, 08:01 AM
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Default Rearbumper melted by exhaust - here too

Hey all!

I know, it's already an old post, but it happened to me now, too....
I'm curious, what my Jag dealer will say on mondän. Car is completely stock, three months driven, now....


cheers,

thomas




 
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Old 06-13-2020, 10:57 AM
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Originally Posted by Cloudsurfer479
Hey all!

I know, it's already an old post, but it happened to me now, too....
I'm curious, what my Jag dealer will say on mondän. Car is completely stock, three months driven, now....


cheers,

thomas



The V6 tubes will get hot enough to melt the rear valence if the car is dyno’d (full throttle load) with insufficient airflow at the rear of the car.
 
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Old 06-13-2020, 12:25 PM
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Hello!

Thanks for the info, but: it hasn't ever been dyne's, neither racetrack or similar things. Just normal roads and for the time being never flat out....
Furthermore, I'm living in Germany under not very hot climate conditions, so, I was really surprised when I saw this.
If this may happen under normal operating conditions, it's a construction issue...
But we'll see the local jag dealer's opinion into this next mondän...

Cheers!
 
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Old 06-13-2020, 12:27 PM
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dyno'd and Monday ;-)
 
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Old 06-13-2020, 07:24 PM
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This is definitely not normal.
 
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Old 06-13-2020, 07:36 PM
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Originally Posted by Unhingd
This is definitely not normal.
Yep, when I dynoed mine some three years ago now it was running over-hot (due to heat soak) with no extraction fan at the back that I can recall and it didn't melt or char anything.
Looking at those pics from Cloudsurfer479 I am seeing the opposite - instead of lots of black soot on the insides of the exhaust tips that you get when it is running rich I see very clean maybe light greyish deposits.
Tells me it has been running way too lean and therefore way too hot, and if it has been running way lean something (I know not what) must be causing it.
 

Last edited by OzXFR; 06-13-2020 at 11:00 PM.


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