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XJ ( X308 ) XJ8 / XJR 1997 - 2003

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  #1  
Old 10-20-2011, 09:12 PM
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Default Supercharger problem?

Had my XJR in at a local European car specialty shop for fuel pumps. The mechanic directed my attention to an “interesting” noise the engine is making. The noise seems to only happen when the supercharger is changing its RPM.

I made a video of the situation; does anyone know if this is definitely a supercharger related issue?

Car is a 2002 XJR
68,000 miles

the noise is the "clanking" right at start up and at the beginning of the engine revs.

MVI 2011 - YouTube
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  #2  
Old 10-20-2011, 09:19 PM
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I would disconnect the SC and make sure it the source of the noise - they are normally robust
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  #3  
Old 10-20-2011, 09:37 PM
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"clanking"? as in a bicycle chain rubbing against a chain guard?

That would be cam tensioners/chain.

The supercharger does not change speed independently of the engine. So, it could be anything changing speed.

On the other hand, if it is at the supercharger drive snout, it is the supercharger drive. Rebuild kits are available.
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Old 10-21-2011, 03:17 AM
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Yep, drop the SC belt off to confirm - the engine will run without issues with the SC disconnected, if the noise isn't there, you can assume its the charger - your model year hopefully means your engine has metal tensioners, so we could rule out timing parts making the noise, possibly....

Is the noise more prevalent when it comes off revs? If so you'll need one of these fitting....it's the one thing that can cause this kind of noise. The coupler.
Eaton supercharger coupler M90 Thunderbird Etc New BIN | eBay
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Supercharger problem?-sc-coupler.jpg  
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  #5  
Old 10-21-2011, 05:10 AM
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Quote:
Originally Posted by Sean B View Post
Yep, drop the SC belt off to confirm - the engine will run without issues with the SC disconnected, if the noise isn't there, you can assume its the charger - your model year hopefully means your engine has metal tensioners, so we could rule out timing parts making the noise, possibly....

Is the noise more prevalent when it comes off revs? If so you'll need one of these fitting....it's the one thing that can cause this kind of noise. The coupler.
Eaton supercharger coupler M90 Thunderbird Etc New BIN | eBay
Sean,
Where does that coupler install in the SC?
Vector
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01 XJR, Anthracite Pearl Metallic/Ivory
Secondary Tensioners done.
RealGauge. Antenna switch installed. Trans fluid changed. Supercharger oil changed.
Red Calipers. Electric exhaust cut outs installed, WOW! Fender leapers changed to side markers.
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Old 10-21-2011, 07:59 AM
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Quote:
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Sean,
Where does that coupler install in the SC?
Vector
On the front of the top rotor. If you have to ask, leave it to the experts.
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Supercharger problem?-explode.jpg  
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  #7  
Old 10-21-2011, 08:23 AM
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I use these type of couplers to repair the Eaton M112. The M90 uses the same coupler.

Eaton GM Ford OEM Supercharger Coupler NEW | eBay

bob gauff
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  #8  
Old 10-21-2011, 09:22 AM
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thank you for the replies

I removed the supercharger belt, fired it up and it didn't make the noise.

Looks like I'll be removing the supercharger and putting a new coupler in there or mailing my supercharger somewhere to let them do it.
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Old 10-21-2011, 07:45 PM
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Quote:
Originally Posted by Sean B View Post
On the front of the top rotor. If you have to ask, leave it to the experts.

I probably "can't afford it" either, LOL!

(If you have to ask.........)

Vector
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01 XJR, Anthracite Pearl Metallic/Ivory
Secondary Tensioners done.
RealGauge. Antenna switch installed. Trans fluid changed. Supercharger oil changed.
Red Calipers. Electric exhaust cut outs installed, WOW! Fender leapers changed to side markers.
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  #10  
Old 10-23-2011, 07:25 PM
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this whole operation was a pain, but it's out. it's interesting how there are coolant lines into the throttle body and 3 coolant hoses under the supercharger, wiring clips everywhere, and many vacuum lines.

SC doesn't seem to be in too bad of shape
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Supercharger problem?-sc1.jpg   Supercharger problem?-sc2.jpg   Supercharger problem?-sc3.jpg  
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  #11  
Old 10-23-2011, 08:49 PM
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Do yourself a favor and replace the coolant heater hoses in the engine 'valley' before reinstalling the intake system.

bob gauff
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  #12  
Old 10-24-2011, 06:57 AM
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Did you take any pictures of the hoses -- always wondered what it looked like under there!

Replacing the hoses sounds like a good idea .........
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  #13  
Old 10-24-2011, 01:11 PM
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Quote:
Originally Posted by yeldogt View Post
Did you take any pictures of the hoses -- always wondered what it looked like under there!

Replacing the hoses sounds like a good idea .........

I'm not the OP but I got a ton of pics in this thread. The 1998 XJR 4.0 to 4.2 engine swap thread !!!:)

I can also post some more if you want to see anything in particular as I took a ton of pics and they are not all in the thread.
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  #14  
Old 10-24-2011, 08:44 PM
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I think I will replace the hoses, I don't want to go through the supercharger removal process again.

And go with what adam 699 can give you, I won't be around the car again until thanksgiving sadly
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  #15  
Old 06-11-2012, 06:52 PM
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Quote:
Originally Posted by plums View Post
"clanking"? as in a bicycle chain rubbing against a chain guard?

That would be cam tensioners/chain.

The supercharger does not change speed independently of the engine. So, it could be anything changing speed.

On the other hand, if it is at the supercharger drive snout, it is the supercharger drive. Rebuild kits are available.
Plums, where can I purchase a rebuild kit for a 2003 XJR Supercharger?
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  #16  
Old 06-11-2012, 09:00 PM
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Quote:
Originally Posted by JaguarXJR02 View Post
thank you for the replies

I removed the supercharger belt, fired it up and it didn't make the noise.

Looks like I'll be removing the supercharger and putting a new coupler in there or mailing my supercharger somewhere to let them do it.

Go to UK Ebay and buy yourself IMO a 3lb stainless steel pulley and have PSE put it on for you and have them rebuild the SC.
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  #17  
Old 06-11-2012, 09:47 PM
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Quote:
Originally Posted by Rlover View Post
Go to UK Ebay and buy yourself IMO a 3lb stainless steel pulley and have PSE put it on for you and have them rebuild the SC.
old thread, I had this all sorted out close to 6 months ago
Update on the XJR
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  #18  
Old 08-05-2012, 11:38 PM
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Default Supercharger rattle

JagXJR02,
What was the final resolution to your supercharger noise? Did you have it rebuilt, and if so, did they find a definite problem? I now have the exact same noise as your original posted video on my 02 XKR.
Thanks
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Old 08-06-2012, 12:01 AM
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Sorry, didn't catch the link to the new thread. Thanks for all the great info!
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Old 08-07-2012, 09:58 PM
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Quote:
Originally Posted by Jagheim View Post
Sorry, didn't catch the link to the new thread. Thanks for all the great info!
no problem glad my issues can help others pin down their issues faster
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Old 08-07-2012, 09:58 PM
 
 
 
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1999, 2002, 42, belt, common, drive, eaton, jaguar, kit, problems, reubild, supercharged, supercharger, xj8, xjr



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