Ive got a 2010 xfr 5.0 sc....had a box-o-rocks rattling sound coming from engine bay. Seemed to be in rhythm with the serpentine belt movement, so I assumed that maybe that sound was just echoing through engine , as I was inspecting with my stethoscope. Well, shortly later , there's a misfire on cylinder 6. Change plug, change coil. Missing on 6. Reduced engine performance. From what i've gathered these superchargers , have a high failure rate and will give you the box of rocks sound with misfires. Logically , i'm not thinking that that would give me a consistent misfire only on one cylinder , though??? Borescope cylinder 6 and it's very clean as if it's been washed with fuel and not firing , it is wet and one small corner of it cylinder with what appears to be a foreign object....have attached photos. Is this maybe a needle bearing from the rear of the sc???

 

No the SC is very reliable. Not many problems at all. The biggest one is the snout noise but that causes no problems besides the noise. If you wish to check remove the SC belt and start the engine. That will tell you real quick.

Best to post what codes the car has. Maybe an injector replacement but that's a guess.
If that is a bearing from the SC inside a cylinder your engine would be locked up in a smoking pile of ruined metal! Forget that theory.
.
.
.

 

Yes, that’s almost certainly a needle bearing from the supercharger coupler or rear drive. Common failure on the 5.0 SC. The rocks-in-a-can noise is the bearing cage breaking up, and those needles can get sucked into cylinder 6 because of intake runner length and air flow patterns. Wet cylinder and one clean spot matches fuel wash and a foreign object bouncing. Stop driving it or you’ll hole a piston. Time for supercharger rebuild or replacement plus intake cleaning.

 

So, Jay35.....i have skimmed through postings, replys etc...of clubarth's(a senior member), and through some of yours(as a junior member here, like myself). When you put in all the work efforts( which never ends in this field of study) did it require to become actually proficient in this trade, professionally.... You realize there's a enormous difference between some hillbilly , with a ranch , calls himself a mechanic, and an actual technician. I can also kind of tell pretty easily, which one of you know, the ****er talking about. So I would like to say thank you for your response. Are you able to shed some light on your experiences or what is it that, you know, for certain that that is what we're looking at here, because honestly, in my experience, I have yet to have my hands inside of anything supercharged. Sadly, so my first-hand knowledge and experience in what goes on inside of it is absolutely, this is my Virgin voyage, so to speak....🙄🤷🤣

 

Not a common failure. Please post another one? I have never seen it.
.
.
.

 

ɓ
I am not familiar or experienced with Europeans. And absolutely zero times have i ever gone inside of anything of a supercharger. So, diagnostically i have no comprehension for which to logically reason or deduce- anything at all, really. But any real professional technician in this field who knows the value of being able to do your job properly and definitively prove out the cause of a problem instead of just guessing with the customer's money and throwing parts at **** using the most likely thrown part a problem. I still know how to find the information that I need that it's the biggest tool at my disposal in my tray , and any real technician knows that that in your pocket , screwdriver and your flashlight. Hillbillies, with a ranch that call themselves mechanics are the ones that think forums are the place to find real information I'm still diagnostically at a advantage to those who think that forums are a source of actual information, more than the mountain range of misinformation, they actually are, for every speck. Of real. Information and data. The fact that I have no comprehension is the ONLY reason i am allowing myself to try a forum for a source of real information. For every speck of real information out here onthe internet- there is a MOUNTAIN RANGE-of misinformation. Any & Every genetically watered-down uneducated ****tard and his brothercousin are able to put **** up out here......thinking they are being informative and using technology at our fingertips to help our species learn grow & advance- as they are taking a first whack at trying some usually risky and stupid **** they saw some idiot who doesn't know anything about anything - try to do online and it worked(really they just got lucky). Normally, i go to the actual source of information- that would be manufacturers information. Because this is categorically a European, full access to all of that real, complete information is :

 

There is no such thing as complete access to complete information- unless i am jaguar. And because it is a European, any actual real manufacturer's information specs procedures, diagnostic strategies. Any of that is a nightmare to navigate and an absolute run around in circles and figure 8, looking for one piece of ****ing information. Don't even get me started on wiring diagrams. It is quite literally a foreign language.No actual hands on training more time in anything , european. Only european shops **** with europeans , and there are many reasons for that. So I am at a loss\nAnd i'm grasping for straws here, with hope that I can use my professional abilities and knowledge and expertise and try to look for individuals that appear to have real knowledge and information to give. And know what they're talking about, that is what I'm trying to do, because after this, I'm going to have to recommend them to the European shop. That I know is reputable near me which will be, you know, at least likely the rest of the summer out before my client gets there very desired jaguar back.\n And an enormous bill. I can't even imagine.\n Not to mention, I'm left with, you know.\n Something I did not figure out which will eat away at me to no end.. but sometimes the best service is a good recommendation, and I know that so I'm trying to inform myself here by not so much looking for the answers I need. But looking for individuals who appear to know what the **** they're talking about, so that, hopefully I can get some information and some enlightenment from them. Does this make any sense?

 

So to answer your request\nTo show you cases of which , this is a failure of an engine after a hundred thousand miles , even sometimes as young as thirty thousand miles.... All you gotta do is Google the symptoms of a cylinder 6 misfire, and noise in the engine Bay. And you'll start getting\n Results of jag owners describing misfires, they can't track down and rattling in the engine Bay.That sounds like marbels or rocks and has no steady rhythm to it.... Like one out of every ten postings on this mystery misfire subject is heavily discussed supercharger failure front back inside outside all around.... But I mean, Hey, at least Ford circled their ****ing mistakes right on the front -So i'm not really surprised what i'm finding out here with these engines. Very sad to see the jaguar legacy run through the mud like this. Its a damn shame really

 

What's most confusing about this entire thread is where you actually found your cases and information of these being a very dependable engine or supercharger or car altogether. In the two thousand ten x f r category....??? Hell , since two thousand four , anything with a ford guys sense of quality and pride in their product is certainly wearing women's panties underneath any of what you see. Most specifically , after a hundred thousand miles , if they ****ing make it that far. That is real information. Absolute failures. I mean, the only thing I can say is at least the guys working over at Chevrolet waited until after 06. To lose any sense of pride or dignity in their work ethic. Sadly, Chrysler chev & ford all jumped on the same piece of **** train and now everybody just uses paper plates and plastic forks out here. Cuz people will still buy it

 

Hi Brandon,

Welcome to the Jaguar Forums.

While I agree that much of the information posted at other forums is uninformed or plain wrong, I think that in time you will find that at the Jaguar Forums things are better, and accurate information is far more common, and knowledgeable members are generous with their time and are willing to help.

Making multiple posts to tell us how bad things are is not helpful and will discourage others from reading your future posts or taking the time to offer their knowledge and wisdom.

Also, an occasional line return will break up your large blocks of text that make other members' eyes glaze over and discourage them from reading your posts.

Don't get sidetracked because one member thinks your problem is uncommon and another thinks it is common. The fact is, your engine has a serious problem, and you're going to have to figure it out and resolve it, or salvage the vehicle.

You can download the Workshop Manual and Electrical Guide for your car at JagRepair.com - Jaguar Repair Information Resource, a website hosted by our member Gus which offers many Jaguar factory reference documents provided by our member motorcarman (Bob Gauff), a former Jaguar dealership technician.

Superchargers are very simple devices, so don't be intimidated as you proceed with diagnostics and disassembly.

Please keep us informed as you learn more.

Cheers,

Don