Quiet rattle / 'tinkling' noise and intermittent squeal

Charlieepie

New member
Hi all,

I've had my F-Type for about a month now and over the last couple of weeks have noticed a slight noise coming from the engine bay when the engine is cold. If I drive it somewhere and the engine warms up, when I restart the engine the noise will have almost completely gone (sometimes audible at very low speeds).

For info is a 65 plate (MY16 according to the Jaguar online servicing), V6 S, manual gearbox. Has been serviced yearly, most recently August this year. Jaguar online servicing suggests services to schedule but don't detail any extra work.

It's hard to describe, I'd say a quiet rattle / fast (but very quiet) ticking noise? and I don't think it fits anything I've seen on this forum using the search function hence the new topic. It's also too quiet to show up on a video as I have tried to capture it. It's not there when I initially start the engine, then it starts up when I set off and gets worse when pressing the accelerator. It's more audible at lower speeds and lower revs BUT I think that might be at least partly due to the fact that the engine noise masks it at higher speeds. I can just about hear it over the radio but I think that's because I know it's there not because it's loud. I think based on this (mostly getting worse on acceleration) that its to do with the fuel system.

Anyway I took it into the garage that I bought it from (local Toyota dealer; 1 year warranty). They had a listen, confirmed its what they think is an 'abnormal' noise, but that they didn't want to 'tinker with a car of that calibre' (which did make me laugh). They asked me to keep an eye on it and basically let it progress, and if it gets worse they'll send it off to the local Jaguar dealer for further investigation. The mechanic I spoke to said he suspected something to do with the fuel lines and described the noise as a 'tinkling' but I don't think it sounds very metallic so not sure about that.

Has anyone had similar / have any idea what it might be? The car is running fine, no abnormal smells, no lights on dash etc. My worry is that this might be the beginning of an injector failure; I've got a year's warranty and Toyota have assured me even if this fault gets worse outside of the year they'll cover it but I don't want to let it get that far. But I also get their reluctance to send it off to Jaguar straight away as it'll cost them a bit of money.

Separately (I think), intermittent and at low speed there's an occasional squealing noise. My first thought was a belt but I thought this would be a fairly consistent noise rather than happening randomly. I haven't pinpointed what causes this / makes it worse yet as it's only happened to me a few times. Any ideas what this might be (if not a belt?)
 
To be honest I think Toyota have given a fair response at this stage - with some obvious exceptions a warranty will generally only cover failure and not noises unfortunately.
Having said that, and bearing in mind the car has been stood in the cold for 2 weeks, I’m sure if things get louder or more persistent you’ll be able to convince them to get it looked at.
At main dealer costs of £200/hr it’s a frustratingly large bill just for the diagnoses.
At a guess I’d say it might be the supercharger snout bearing.
At this stage you could ask them to have any fault codes checked for and then take it from there.
 
Oh yeah I'm not knocking Toyota's response here at all, my last two cars have been from them and they've been absolutely spot on, this is my first not-Toyota though so obviously they're not as well equipped to diagnose and repair as my previous cars (though neither of them had a single issue which helped!).
I brought it up ASAP so they've got record of it so if it fails 2 weeks out of warranty next year (it would be sods law), it'll be covered as it'll be counted as sort of pre-existing (which they have said it would be).

Just curious to what it might be. If the supercharger bearing, I was expecting more noise, unless it just might be a really early indication?

As the car is driving no issues I'm trying not to worry too much but I keep turning my radio right down and trying to work out if it's got any worse. I think I'm just being paranoid but it's an expensive car to just let issues develop on!
 
It might be worthwhile introducing yourself to your local independent Jaguar specialist, https://the-jaguar-specialist-register.com/independent-jaguar-specialists/ and asking their opinion. In the hope of your future business I would think it unlikely they would charge much/anything to share their thoughts on the noise.
 
Thanks for the link. Unfortunately absolutely none of those are local to me - I’m in Cumbria and my closest is Preston, about 2 hours drive!
However my closest Jaguar dealer is an hour away anyway so might be worth booking a day off in the new year and taking it to get a quick check. Also one to bear in mind for future servicing.
 
I used to have a 2016 V6 and I had the very light rattle from the super charger coupling... Another thing to check. This is a pretty big deal to fix and I just let mine go... I'll attach the US TSB...
 
That’s what I was thinking Navigator. Can’t complain (other than fuel use… but I didn’t buy it to be eco!)

Thanks for the technical info rtmeyers. I take it this is an issue with later models than the 2014MY ones mentioned in the bulletin?

Dare I ask… when you say you let it go, do you mean you lived with the rattle until it failed? Or did it just make noise for the rest of your ownership?
And dare I also ask if/when it gave up how much was it to repair?

I hope whatever it is fails within warranty 😂
 
Never got worse for me. Traded it in with 40K miles. Now driving P300 F type... I have seen on the USA forum that others with later models seem to have this issue too, but not an expert. Dealer told me at the time that it was not a failure issue, just a noise... but looking at pictures in article below it does look like it wears over time and gets worse...

Here's something I found that might be of interest.... Have no idea if these parts are better than OEM with Spring...

https://www.amazon.com/dp/B09WQLLBKK/ref=sspa_dk_detail_3?psc=1&pd_rd_i=B09WQLLBKK&pd_rd_w=Wf8n0&content-id=amzn1.sym.46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_p=46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_r=0DK60X3QTZXSHHJNQFCE&pd_rd_wg=5eYvJ&pd_rd_r=d8b067d4-e1e1-40ce-a45b-dac9ecc78572&s=automotive&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWw&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExTDEwRzJZN1BPM0JDJmVuY3J5cHRlZElkPUEwODcwNzExM1NFU0kxS0daMFNRNiZlbmNyeXB0ZWRBZElkPUEwNzMzNDQ0MkdIMjZTN05STlJSNiZ3aWRnZXROYW1lPXNwX2RldGFpbCZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Also, an interesting article on how they are changed... The TSB say's it's a 3 plus hour job for a trained mechanic with the right tools...

https://classicairheads.com/blog/2020/12/29/off-topic-jaguar-f-type-supercharger-removal-coolant-pipe-replacement-and-supercharger-coupler-replacement/

One final comment... An experienced Jaguar tech would know exactly what the sound is for a bad coupler and could at least let you know if they think it needs replaced, or if you just have a noisy fuel injector or valve... On my P300 I had a tapping sound and it was a bad grommet on the engine cover causing it to bounce against a bracket on the engine.... Engine noises can be a variety of things... I would think you could take it by a Jag dealer and buy them a cup of coffee to just take 2 minutes to listen to your engine... Good luck... These are great cars....
 
rtmyers1 said:
I would think you could take it by a Jag dealer and buy them a cup of coffee to just take 2 minutes to listen to your engine... Good luck...

You'd need a lot of good luck not to be stung with a hefty "diagnostic fee". A Jag independent might be more cooperative.
 
The symptoms you describe are very similar to a problem I had ! I left the car with the dealer for investigation and they found that the noise was originating from the accessory drive belt ! Belt and tensioner drive replaced ! No noise now
 
Thanks all for the thoughts!
I took it out for a decent drive yesterday (120 mile round trip) and it's still driving great (what a joy my car is!), and I barely heard the rattle beyond the first 10 mins - but what I did hear was my mystery squeal again. I've pinpointed this provisionally to making a noise only on acceleration and only when engine is totally cold (as in it does it 3 or 4 times on acceleration and that's it).

So if they're related, it's potentially a belt as the culprit. Will monitor over the next couple of weeks to get through the festive period then either give Toyota another call (belt squeal is very noisy and I wouldn't have bought the car if it had done it on my test drives!) or one of my local(ish...) Jaguar specialists a call.
My local dealer is Jaguar Carlisle and they seem to have mixed reviews on how expensive they are so I'm not too hopeful they'd do any diagnostics for free.
 
A belated update as I recently had the car looked at by Jaguar after the garage I bought it from took it in -

- They reported they sorted the rattle by fixing some panelling in the boot - but it is definitely still there and definitely still coming from the front of the car. It’s intermittent though so I suppose they may have started it up and it’s not made a noise so they’ve assumed fixed!
Anyway it’s no worse, I’m still sort of hoping whatever it is gets worse before my warranty is up so can get sorted rather than waiting until the end of the year. From reading other posts if it’s an issue with anything super charger related it might be an expensive fix!

- The squealing on acceleration is related to the traction control - an actuator apparently. Hence why it’s worse in the wet as traction control is working harder!!!
 
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