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Discussion Starter #1
I have an irregular noise at idle:


This video was taken a while ago, I forgot about it and haven't really driven the car much to be honest. It doesn't even happen each time I drive it either.

The lack of regularity makes me doubt tensioner fault, as I would have thought it would be regular chatter if it were.

Perhaps supercharger isolator has worn, anyone have any ideas?
 

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I had a noise similar to that, like an occasional irregular clanking.
I took the belts off and found a fair bit of play in the waterpump bearings.
Haven't heard it since the waterpump was replaced.
 

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I have an irregular noise at idle:


This video was taken a while ago, I forgot about it and haven't really driven the car much to be honest. It doesn't even happen each time I drive it either.

The lack of regularity makes me doubt tensioner fault, as I would have thought it would be regular chatter if it were.

Perhaps supercharger isolator has worn, anyone have any ideas?
I am 99% sure that is the classic worn coupler/isolator rattle.
The intermittency is the give away, pretty much every other AJ133 rattle (there are lots of them!) is consistently rhythmical.
If you get a fairly loud "clonk" from the engine bay around half the time you shut 'er down then it's 100% the coupler/isolator.
Replacement couplers are cheap and even the whole SC snout is not particularly expensive, the problem is the labour cost coz the SC needs to come off and that is a big messy job.
 
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Discussion Starter #4
Looks like supercharger out then, which was always on the cards...

Might as well do drive belts, check the pulleys and tensioners, rebuild charger and change its oil and do Waterpump and coolant.

Nice part Bill after becoming unemployed 😂

Although not having a job to go to means I have time to do the work...
 

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Looks like supercharger out then, which was always on the cards...

Might as well do drive belts, check the pulleys and tensioners, rebuild charger and change its oil and do Waterpump and coolant.

Nice part Bill after becoming unemployed 😂

Although not having a job to go to means I have time to do the work...
Lots of info about this job on the Yank forum: Jaguar Forums - Jaguar Enthusiasts Forum
And most of them over there recommend that if you are taking the SC off on a 10 year old AJ133 then you should replace all the plastic coolant hoses and tubes while you are at it. And they mean ALL of them coz sooner or later one or more are going to split/burst/leak and then you are in a world of pain.
 
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Discussion Starter #6
Cheers, did look before at what else to do whilst it is off, time for a more serious look and actual plan
 

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Sounds like a belt tensioner bearing to me?
 

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Discussion Starter #9
I've contacted my mate about potential work, depending if I get time to do diagnosis today may have the belts off and check some pulleys and whatnot...
 

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A few mixed messages here about the SC and things that can rattle.
There is a coupler, there is a belt tensioner and there are snout bearings. Three completely different things with no connection to each other except maybe the coupler and the snout bearings, as in a badly worn coupler can effect the bearings.
Of the three the most problematic by miles is the coupler and I'm still putting my money on that being the main and possibly only problem, so diagnose/check/replace that first.
That's the hard part, correct diagnosis, all three rattles sound vaguely similar and all three come from much the same place. Of course if you replace the snout (the warranty fix but way too late for that now) you would fix both the coupler and (possible) bearing problems in one fell swoop. Or you could go the other way and replace the tensioner first, by far the cheapest and easiest labour wise but probably a waste of time and money.
When I first took my two year old F-Type into the dealership to fix the loud SC rattle under warranty I told them that I was 99% sure it was the coupler - all the classic symptoms, an irregular loud rattle from the top of the engine at start up and cold idle, slightly less rattly when warm, and a loud "clonk" when shutting down - but they ignored me and came back about three hours later (while I waited in the lounge) telling me it was the SC belt tensioner. I wasn't impressed but I OK'ed the replacement of the tensioner under warranty. Three days later when I picked up the car I couldn't tell any difference so I took it back in again a few days later for another diagnosis, and THIS time they agreed it was the coupler. Two weeks to get a replacement snout from Sydney and have it fitted under warranty, then another three days without the car and no courtesy car mind you never mind all the faffing about with rellies trailing me to and from the dealership to give me a lift!
 

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Discussion Starter #11
I'll rebuild the charger, with the readily available kit with the snout bearings and coupler as it was on the list anyway. As it isnt driven much ill wait until I've secured employment before I dive in
 

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I have an irregular noise at idle:


This video was taken a while ago, I forgot about it and haven't really driven the car much to be honest. It doesn't even happen each time I drive it either.

The lack of regularity makes me doubt tensioner fault, as I would have thought it would be regular chatter if it were.

Perhaps supercharger isolator has worn, anyone have any ideas?
I had the same noise and was told it was the super charger coupler which has since been replaced
 

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I had the same noise and was told it was the super charger coupler which has since been replaced
Did the noise go away after replacement?
I ask because when my SC snout was replaced under warranty the "clonk" went away but the rattle did not, the engine has remained very very rattly throughout. It is now getting quite bad and the "clonk" has returned intermittently.
I have never been entirely sure that the local JLR dealership really did fully perform the warranty fix by fitting a new SC snout, and I am now worried that the spring inside the coupler has gouged lots of metal off the SC shaft - plenty of reports and pics of this over on the Yank forum, admittedly on older V8s and not the V6.
I'm now seriously considering taking my car to the only Jag mechanic I trust (he installed the larger crank pulley) for a full diagnosis, trouble is he is way the other side of town involving a 120 km return trip through the 'burbs!
 

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Kim, surely you don't need an excuse to take it for a "trip" :D
 

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Kim, surely you don't need an excuse to take it for a "trip" :D
Yep it's a trip not a very fun one, suburban traffic the whole way with nothing but 50 and 60 km/h speed limits, masses of traffic lights and greed cameras and literally thousands of hopeless crawling muppets to negotiate. I am in effect going from the far north of Adelaide to the far south of Adelaide and back and there is no bypass route.
Adelaide has a third world road network and the main north/south road has so far taken over 60 years (I kid you not, 60 years!) to be half fixed up. I hate it!
 
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