I just purchased a 2012 XJL Portfolio with 48k miles. Started reading threads about it here and found the water pump issue... I have attached a list of parts I think I need to upgrade everything but want to make sure I haven't missed anything. Also, I want to make sure I understand the new configuration for the water flow - I found a pdf that was posted but it wasn't exactly clear to me. Can anyone shed some light on this for me? Also, the part AJ89664 has already been replaced.

I'll probably be changing the front brakes - any suggestions? I know everyone has their own personal preference and I recently put some powerstops on my Silverado and my wife's Mercedes GLK and have been really happy with them on both vehicles - just not sure if they're good fit for the jaguar.

Do you follow the Jaguar maintenance schedule and/or make any changes to it?

 

Looks pretty good but I don't have all the parts memorized. You for sure have the latest water pump which is great. Consider replacing the rear water manifold as that is also a failure prone plastic part. This requires the SC to come off but you should plan on that anyway so you can change the SC oil. Also are you aware of the SC snout clunk? Again fairly common and not too expensive to do since the SC needs to come off anyway.

The very large SC plenum gasket can be reused so that will save you some money there. I did not know this and replaced it with a new one.

Biggest thing is reduce your oil change intervals to 6K-8K miles because of the timing tensioner stuff.
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Thanks for the advice. I do not have the supercharger on my car - it's the 5.0L V8 with 385HP. At least that's one thing I don't have to worry about

 

I'm interested in the effects of coolant not being replaced at the recommended intervals or more frequent.
My guess is that many do NOT replace coolant until there's a leak.
I suspect that the composite parts and the rest of the coolant system might hold-up pretty good with frequent coolant replacement.
Coolant does degrade & become acidic over time, and since coolant flush & fill is reasonably-priced at the dealership, I take my wife's there for that every 2 or 3 years for a flush & fill.
...although it's simple to do myself and I do have the flush & fill tool that I use on my 2012 Range Rover also with the 5.0L N/A...

My wife's 2012 N/A with 146k miles has had no sign of coolant problems, and although I'd like to change the coolant pump & other pipes pre-emptively, I have no sign or even a faint smell of coolant yet. And if I recall correctly, it's got the original pump and pipes (at least I know no changes for the last 7 years, and no dealership service record for warranty coolant system repairs for it's first 3 years).

On the Forum, I do read so many of us discuss the importance of frequent oil changes, but I've yet to see anything about keeping the coolant fresh & healthy.

It's great to see Sabrina the service writer contribute. If they could include their physical location, some of us may be able to use their shop for service/repair. Almost any service shop that chimes-in on forum concerns gets a + in my book.

 

I think Jaguar built in a coolant replacement strategy with all the poorly designed parts.

I do agree that it makes sense to replace the coolant.

Does anyone know if coolant is included in any of the standard maintenance intervals?

I have the entire 10 year service history for my car and a specific coolant flush is not in there unless it is hidden in one of those standard maintenance jobs. Seems unlikely that the original coolant is in this car considering that in the 10 years (and only 14K miles) the car had 3 brake fluid flushes (another often overlooked item) Previous owner was relying on dealer's service advice. Doubtful a dealer would have left that coolant flush money on the table. .

 

Here is the recommended services for 2013 XJs.

 

Thanks for that.

It appears coolant is not in the scheduled maintenance but is good for 9 years or 160K miles. Seems a bit long.

 

Yes, the Topix chapter for the cooling system claims the coolant is good for 10 years, 150k miles, but then again the oil change interval is higher than most of us would accept, and the transmission fluid is good for life.
So even the recommended interval is way too long in my opion.
I don't trust any long intervals.

 

Nearly all Dex-Cool using cars have a 10 year, 150K miles change interval. Most recent vehicle I worked on was a 2014 Ford F-150. Same thing 10 year/150K mile service interval. I have found that since most modern engines have become Aluminum I just don't see all the junk build up from corrosion. Truck has the 5.0L Coyote engine.

I did a flush and ran some cleaner thru that truck and nothing came out after a week of driving around with the cleaner in it. Fluid was very clean and no chucks at all. I don't think it even needed a flush but I bought it with 150K miles on it. Figured I would just go through it and give it a bumper to bumper service.
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Well I guess to be fair, I've never changed the coolant in my 1992 Ford Explorer, but it doesn't really have much plastic, as opposed to the 2012 Jag (and RR) with many more plastic parts. I have had a plastic cooling hose end on my 2003 Range Rover break during normal operation, but that's the pre-Ford (Jag) BMW design with BMW coolant.
Maybe the coolant's alright for that long, but the plastic - not so much.
And from what I see with our 2012 Jag & Rover, the cooling system plastics look pretty healthy with changing coolant, whether or not it helps.

 

what year did jag start putting the improved water pump in

 

for sure. Glad I dont have a sc too. Plenty fast like it is.