XK8 / XKR ( X100 ) 1996 - 2006

Alternator change 1st failure

 
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Old 06-07-2019, 07:51 AM
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Default Alternator change 1st failure

Well Eid is coming to an end and I planned to put in my brand new alternator.


But I failed today to change It out. Followed Gus’ jagrepair.com instructions and the car fought me every step of the way. Even taking out the air box proved troublesome.


The rubber sprung support, outer side, broke in two. Not normally a problem but one of the inner plugs was already snapped. Found that out as I recently changed the air tunnel, so probably the old plastics and rubbers were telling me .... that they’re old.

Then the cooling fan assembly would not come out despite unclipping the upper coolant hoses. Lots of side tabs on my fan unit fouling pipes and more importantly an AC freon line. Probably not the original OEM fan unit. Had to give up. As I lost a few litres of coolant, I went to check the coolant tank and the cap broke. Bugger!

As I had to abandon removing the fans, I hoped I had enough room to work so carried on.

Removing the serpentine belt was easy enough but the idler pulley had score marks on it. Didn’t rattle when spun, but I’ll need to change it out.

The real bugger was the restricted access to the alternator from the top.

Had past oil leak from camshaft cover, when I got the car, and the old alternator was covered in old oil. One of the reasons it’s not working 100percent. Even bending heat shields out of the way, I couldn’t get to the ground connector or plug or to the upper bolt. There’s a nut on the bolt that just wouldn’t work with me.

Looked from underneath for access and spotted another reason why the alternator isn’t working as there’s a plastic aero foil, I think, upside down, blocking airflow to the C duct that cools the alternator. I switched it round.

I presume this is the right way up?

Having a beer now to regroup and maybe try again. Do I need to take out oil filter for access from the bottom or am I missing something?
 

Last edited by sklimii; 06-07-2019 at 10:12 AM. Reason: corrected link
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Old 06-07-2019, 08:11 AM
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Default Correction to reference - jagrepair.com

Moderators - correction to my reference to Gusí website. Should be to jagrepair.com. Link below

JagRepair.com - Jaguar Repair Information Resource
 
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Old 06-07-2019, 08:51 AM
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David, your comments about the connection reminder me of my battles. See if this helps: https://www.jaguarforums.com/forum/x...ght=Alternator

John
 
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Old 06-07-2019, 08:56 AM
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Default Thanks for the update

Sorry to hear that you had such a bad experience. I am getting ready to face the same problem and thanks for you input. When I had to replace my radiator removing the fans was not difficult so surprised you ran into problems there. I believe I pulled the air box also but maybe not . While the workshop manual does not mention it I will also remove the oil filter. The work shop manual talks about making a tool to remove the nut with the bush that may help you. My problem is also the result of an oil leak so replacing the valve cover gasket is my first step.

Hope your next attempt is better and please keep us posted.
 
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Old 06-07-2019, 10:01 AM
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Removing the oil filter on my wife's 2006 XK8 gave me considerably more working room when I had the alternator refurbished last July. Good luck with your efforts....
 
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Old 06-07-2019, 10:14 AM
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David - hope you have better luck next attempt. I fixed the link for you
 
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Old 06-07-2019, 10:24 PM
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Your Duct scoop looks right. I have a coupe and and XJ so I don't have the bar going through the scoop like that.

I drilled 2 small holes in my scoops and use a zip tie to snug the scoop to the C duct to better direct the airflow.
 
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Old 06-09-2019, 10:40 PM
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Default Threatening to swap with younger model improves performance

Well, after my failure to change the alternator, my carís electrical gremlins seems to have disappeared. So much so, I didnít put the Battery tender on for a couple of days of non driving, and all seems to be well. No window memory loss, no erroneous messages on the dash. When running at idle, Iím getting a solid 13.5V charge voltage across the battery too. Result!

When I do any job, I consider it good practise to grease things and spray contact cleaner on any connections, as I go along.

The only thing I can think of, is the when I tried to undo the alternatorís ground, which I failed, I did have to clean it before trying to unbolt it and I sprayed it liberally with Contact cleaner. Itís rubber cover was coated with old oil too, so cleaned that also. That must have improved the alternatorís ground contact.

Now Iím contemplating, would threatening to change the missus with a younger model, also improve her performance? LOL
 
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Old 06-09-2019, 10:53 PM
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Default Why I couldnít remove cooling fan unit

Originally Posted by David F. View Post
... When I had to replace my radiator removing the fans was not difficult so surprised you ran into problems.
Removing the cookingís fans here was a problem because of lines going to the AC drier. Here in the Middle East, summer is extremely hot so AC repair shops are common. Servicing an AC here includes regular replacement of the AC drier due to the humidity. And so I have a spare.


I did notice the one in the car isnít the same. Plus the AC lines to it seems to jointed with different pipe materials. Probably a Bahraini bodge job. Also the cooling fan unit seems to have multiple side fixing bracket/fins so probably it isnít OEM either

Hence the massive problem when I failed to lift it straight up and out.
 
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Old 06-10-2019, 07:27 AM
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Thanks for the info. Will give cleaning the ground a shot before doing a replacement. By the way did you ever get a "Battery not charging" message?
 
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Old 06-10-2019, 07:32 AM
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I couldn't get to the connectors at the rear of the alternator until it was free of its mountings, allowing it to be rotated.

if you're looking to source a replacement 'instrumount' for the airbox, then do a search here as someone has posted a reasonably-priced alternative. The dealer price will make your eyes water.

Originally Posted by DavidYau View Post
Now Iím contemplating, would threatening to change the missus with a younger model, also improve her performance? LOL
Unlikely, and you run the risk of a well-targeted blow significantly reducing yours
 
 
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