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I just got my car back from major service where I replaced tons of parts under the hood. One of the parts I replaced was the supercharger snout and coupler (aka isolator) and then followed it up with a supercharger oil change. I thought I would post some pictures of the supercharger damage that was caused by the spring-based coupler. The pictures are of the part that the coupler sits on (coupler was removed for the photo so you could see underneath). The coupler slides over the three metal pins. The pictures are showing a top and bottom view. The arrows are pointing to gouges in the metal caused by the spring of the coupler rubbing against it. So the spring doesn't just damage the coupler it also damages the supercharger snout itself, resulting in play in the pulley and the rattling sound from the supercharger.
I just got my car back from major service where I replaced tons of parts under the hood. One of the parts I replaced was the supercharger snout and coupler (aka isolator) and then followed it up with a supercharger oil change. I thought I would post some pictures of the supercharger damage that was caused by the spring-based coupler. The pictures are of the part that the coupler sits on (coupler was removed for the photo so you could see underneath). The coupler slides over the three metal pins. The pictures are showing a top and bottom view. The arrows are pointing to gouges in the metal caused by the spring of the coupler rubbing against it. So the spring doesn't just damage the coupler it also damages the supercharger snout itself, resulting in play in the pulley and the rattling sound from the supercharger.
All the best.
That explains why the official JLR TSB warranty fix is to replace the whole snout and not just the coupler, good to know.
And why the pronounced metal on metal rattle when logic suggested it should be just a metal on plastic rattle.
Where are you getting the supercharger parts from. I want to open up my blower on my STR to check it but dont want to do it without gaskets in hand. And maybe a coupler....
Where are you getting the supercharger parts from. I want to open up my blower on my STR to check it but dont want to do it without gaskets in hand. And maybe a coupler....
I got all the gaskets from https://parts.jaguarcarlsbad.com/
1x Manifold gasket left (AJ811590)
1x Manifold gasket right (AJ811576)
1x Supercharger plenum gasket (AJ811948)
I bought the snout/ coupler (new original Jaguar part) on eBay. Was < $300.
1x supercharger spring isolator kit (C2D38554)
If you don’t want to buy the snout, you can just buy the solid oil-filled isolator off eBay for <$30. I didn’t buy this isolator because the above kit came with a spring-type one already installed on the snout. Now seeing the damage on my old supercharger, I wish I had listened to everyone and bought the solid type isolator in addition to the snout. Oh well, I’ll have to do it again in another 9 years or 80k miles when I change out the coolant hoses again.
That explains why the official JLR TSB warranty fix is to replace the whole snout and not just the coupler, good to know.
And why the pronounced metal on metal rattle when logic suggested it should be just a metal on plastic rattle.
Exactly, I was thinking the same thing when I saw it. My isolator didn’t actually look that bad, so this appeared to be the majority of my damage. Another perk of buying the snout, of course, is the comfort of having new bearings.
I got all the gaskets from https://parts.jaguarcarlsbad.com/
1x Manifold gasket left (AJ811590)
1x Manifold gasket right (AJ811576)
1x Supercharger plenum gasket (AJ811948)
I bought the snout/ coupler (new original Jaguar part) on eBay. Was < $300.
1x supercharger spring isolator kit (C2D38554)
If you don’t want to buy the snout, you can just buy the solid oil-filled isolator off eBay for <$30. I didn’t buy this isolator because the above kit came with a spring-type one already installed on the snout. Now seeing the damage on my old supercharger, I wish I had listened to everyone and bought the solid type isolator in addition to the snout. Oh well, I’ll have to do it again in another 9 years or 80k miles when I change out the coolant hoses again.
All the best.
Thanks but it looks like your blower is a different configuration. I have an s type R. So I dont know if this blower has the same failure modes as yours
No it does not.
I have had both. Your M112 Eaton or as they are better known Heaton! In my 2005 STR I never replaced the coupler and I went 132K miles on that car.
BUT do change the SC oil regularly and it's easy to do on a M112.
My 2014 XJT has a Eaton TVS R1900. Completely different and superior in every way to the old M112.
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No it does not.
I have had both. Your M112 Eaton or as they are better known Heaton! In my 2005 STR I never replaced the coupler and I went 132K miles on that car.
BUT do change the SC oil regularly and it's easy to do on a M112.
My 2014 XJT has a Eaton TVS R1900. Completely different and superior in every way to the old M112.
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Hey thanks man. I JUST got this car and never had a jag before. But I live it and im reading every post to learn as much as I can so I can fix this baby up right.
I know im in the wrong forum but I thought our blowers were the same. I kinda like your style better though!
So, to clarify, are the 2009 - 2013 cars also equipped with the Eaton TVS R1900? What I am asking is whether the 470 HP 2014 XJ Supercharged is subject to this problem?
I'm not a tech, but I believe that all 5.0LSC engines are at risk. The reason for my conclusion is that the repair kit that my Jaguar dealer technician recently used on my 2013 XJ 5.0LSC was for a 2017 model: Part # C2D52713. Kit-Supercharger. Look it up online and you'll see that it's not the part number for a 2013. Apparently that kit was improved for 2017 and that latest part number fits earlier models.
So, to clarify, are the 2009 - 2013 cars also equipped with the Eaton TVS R1900? What I am asking is whether the 470 HP 2014 XJ Supercharged is subject to this problem?
There is a top right bolt on the snout that won't come out because the lid hangs down in front of it. How do you get that bolt out without disassembling the whole upper of the supercharger lid?
If not please post a picture or two of what you are fighting. That will help a lot!
BUT I think most people do remove the SC to get the snout off.
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Last edited by clubairth1; Oct 24, 2020 at 01:17 PM.
Supercharger isolator/ coupler wear pics
