XK8 / XKR ( X100 ) 1996 - 2006

Alternator Replacement - Comments

 
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Old 05-20-2019, 07:59 AM
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Default Alternator Replacement - Comments

Well time to face the music. I need to replace the alternator on my 2000 xk8. It appears there is a slight oil leak from the valve cover gasket so will also be doing that while I am in there. My plan is to follow the workshop manual and remove air box, belt, radiator fans and pull it by the book. I know that many of you have done this repair and any advice will be appreciated. I the one question I have it seems some have not removed the radiator fans and I was wondering if I could avoid that step.

I have the correct Denso replacement alternator and the time to do it. Would love to hear from you who have done it.
 
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Old 05-20-2019, 09:07 AM
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I had to refurbish the alternator in my wife's 2006 XK8 last July. The best way to do that was to remove the radiator fan assembly as well as to drain the engine oil so I could remove the oil filter (which opened up considerable working space for the wrenches required to remove and reinstall the alternator. I replaced the original factory serpentine belt at the same time. No idea if your 4.0 engine will require the same approach, but good luck with the job. I was able to get my factory Denso alternator completely refurbished locally with the appropriate Denso parts for about $125. A much better deal than buying a new alternator....
 
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Old 05-20-2019, 10:53 AM
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The process just took a little finagling on my NA '97. No need to remove the fans or drain the oil.

The one hitch is the mounting bracket holding on to the alternator because of a bushing that slips. Once you get the bolts out the alternator might not come free from the bracket. Search the forums for details on that. With the details in mind I pried it out with brute force and a little hammering.

I found that the alternator had one orientation where it fit just right past all of the hoses to pull it up and out of the engine bay. It's as if the engineers laid things out specifically to give the alternator room to get by. It took me a few rotations to find that orientation.
 
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Old 05-20-2019, 10:56 AM
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I have replaced mine twice... and was able to do it without removing the radiator fans either time. You should have no problem getting it out... once it is all loose and the wires are disconnected you can wiggle it out fairly easy on our 4.0L engines.
 
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Old 05-20-2019, 11:07 AM
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Old 05-20-2019, 03:55 PM
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Yes, you can replace the alternator without removing the fan shroud, but if your car has a suppression module:
https://www.jaguarforums.com/forum/x...4/#post1276992

then it also has to be removed, and it's a bit of a fiddle. JTIS 2000 shows it fitted, but it may have been dropped or moved in later cars?
 
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Old 05-21-2019, 06:53 AM
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My 2000 XKR doesn't have that but as it is an R model it does have an intercooler water pump and I had to remove that and bracketry. You don't need to pull the fans. That bushing will fight you but a little brute force and ignorance will get it done. The oil recommendation is solid too, drain it and you have a bit more working room.

The link on TheJagWrangler is a good guide. Gus did a nice job and it is helpful.
 
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Old 05-21-2019, 08:22 AM
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I did mine years ago and it was no big deal. I think I may have removed the oil filter for access or maybe I just did an oil change while I was under the car.
 
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Old 05-21-2019, 08:58 AM
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Glad to hear that it can be easy. Quick question do you remember if you pulled the radiator fans?
 
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Old 05-21-2019, 09:09 AM
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I don't recall doing it on either my XJR or X100 XKR. It's not awful to pull them if you feel you need to.
 
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Old 05-21-2019, 11:13 AM
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I remember learning a few things my 1st time. Glad I captured them in a thread, here you go:

https://www.jaguarforums.com/forum/x...ght=Alternator

Do check the alternator before you leave the store. Rereading my notes reminded me of the time they put the wrong alternator in the right box!

I noticed earlier threads mentioned you don't need to pull the fan. Regardless of whether you need to or not, its just 2 screws and 2 electric connectors. IMO you'll be amazed at how easy it is. Itll help in the end. You do know how to put the hood in service position right?
John
 
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Old 05-21-2019, 11:34 AM
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If you have monster-sized hands like me, go ahead and remove the radiator fan assembly for this job. It really opens up a ton of working space for your hands and your tools. And change your serpentine belt while you are in there....
 
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Old 05-21-2019, 06:49 PM
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The worst part of an alternator removal is the tiny head bolt holding it to the bracket. If there is any corrosion at all, the bolt head can strip and then you are screwed. I had to cut off mine with a cutoff wheel.

When I turned in the Cut up alternator at the junk yard as a core, they gave me a WTF? before giving me $6 for it.
 
 
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