Hi I'm Logan, I'm 26 years old and currently live in canada. I bought my 2015 ultra blue xfrs in early 2019 and I'm currently on my 1st year of not having jaguar cpo warranty.

I am wondering if anyone else has experienced the same issue I'm having at the moment. I don't have any engine codes showing but when I get into acceleration (typically WOT or atleast half) there's a strange noise coming from what I think is the supercharger (engine bay for sure). Its hard to explain the sound so I've attached a video. Best way I can describe it is a static clunky kind of sound, almost like a walkie talkie static sound but the decibals go up and down as the rpms build up.
I took it to my local mechanic who isn't familiar with jags or superchargers but he really wasn't sure what it is.
Any feedback is greatly appreciated. Cheers!
https://youtube.com/shorts/uLjdXBdAPJA?si=-eltOeb8DLazamr7

 

I'm no expert but it could be the supercharger coupling, those have been known to go bad.

I would urge you to take the car to a Jaguar specialist, or a European car specialist. You have a special car and it deserves special attention.

 

Yes, likely the coupling (which is not expensive) but you’ll want to check the timing chain tensioners as well.

 

Hey Logan (I am @mylandoflincoln on IG, I think I follow you there)

As the others have said - first thing that comes to mind is the S/C coupler. These are know to fail and break down as early as 35k. With your windows down, listen carefully when you turn the car off. If you hear a loud knocking or rotational clunk on shutdown, S/C coupling might be a good place to start. (use a stethoscope or long screwdriver and your ear, on the snout of the S/C and have a friend turn the car off from the inside while you observe the noise from the engine Bay Area.

These cars also have a symposia that feeds some engine noise into the cabin under certain loads. Certain noises in the engine will transmit thought the symposia especially if they are correlated to the S/C. It could also be a fault in the symposia itself disrupting the noises that's intending to be enhancing your experience.

Most 2015 car's got the improved chains, and most R-S's were well cared for as they were a top trim and intentional purchase, so I'd be less likely to point at a timing chain failure, and more likely to have the accessory drive looked at. the tensioners, idler pulleys and belts should be evaluated. These can slip during acceleration and causing imperfections in sound, torque, and smoothness. Check the tensioners for visual oil seepage, or bearing noise. Your issues sounds correlated to rpm, so anything rotational should be looked into.

Let us know what you find!

 

You absolutely need to find a JLR independent.

 

That doesn't sound at all like a worn coupler rattle to me!
I've had a worn coupler (and I suspect I still do even after warranty replacement) on my V6 F-Type so I know the sound well.
Yes V6 vs V8 but the worn coupler sound is pretty much identical on both.
On my F-Type the worn coupler rattle is completely drowned out by the exhaust noise (and in my case SC whine as well) at anything over around 1,500 rpm, and to be honest I can't hear it all from inside the car with the doors shut.
A worn coupler sounds like marbles in a tin can, very irregular and not at all rhythmical, and it is most apparent at cold idle (ie immediately on start up of a cold engine).
The rattle then gradually fades as the engine warms up but it's still there even with a warm engine.
Can you hear that irregular rattle on start-up, especially with the hood up?
If not then I reckon your noise is something else.
My prime suspects would be the SC belt tensioner and the number two high pressure fuel pump.

 

Any chance you can remove the SC belt and then test? The car will run fine with no codes BUT will be a DOG!
This should tell you quickly if the SC Snout or the SC belt tensioners are the cause?
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hey landoflincoln, yes that's me on ig. Thanks so much for the knowledge, I'll pass it along to the mechanic when it goes in on the 13th

 

will have to try that, thanks

 

Thanks for your input, I Also thought it sounded different but still hoping that the coupler is the culprit. I can't hear it on startup, only at the beginning of a hard acceleration or in the higher rpms

 

Quick update: had the engine light come on today. The code I pulled was P0496 (evaporative emission system high purge flow). Hoping this is related to the sound I'm hearing.
Has Anybody else had this code?
thanks

 

I've uploaded a video of the engine start up, idle and powering off as well

 

Again, doesn't sound at all like a worn SC coupler to me.
All I can hear is a regular loud rhythmical tick tick tick which is fairly standard on these engines due to GDI and high fuel pressure.
Maybe your noise really is related to the P0496 DTC and your purge valve and/or solenoid is dodgy?
Also it's not uncommon on these engines for one or other of the two PCV (Positive Crankcase Ventilation) valves to have a torn or defective diaphragm and need replacing and this could be the cause of the noise, although the PCV and Evap systems are separate and if you had a torn/defective PCV diaphragm I would expect a different DTC. The PCV valves are in plain sight on the top/rear of the RHS valve cover (LHS as you look at the engine from the front of the car, ie passenger side on a LHD car).

 

Hey man it's Alex from IG (yellohsubmuryne). I also don't think this sounds like a coupler. Sounds more like PCV issues which should be cheaper than a coupler fortunately. Keep us posted.