On one occasion I had an "engine coolant low" warning. It only lasted for a few minutes and I haven't seen it since, but I want to keep an eye on the level and have the correct coolant to hand to top up.

From what I've read the OEM Part number is JLM209723. Googling this I find a few links to jag parts suppliers who don't have stock and this non-Jag one on Amazon:
Would folks recommend this or should I make more effort to source genuine Jaguar fluids?

Thanks, Steve

 

Read your owners manual. There it will show you the recommended number to use. The coolant is the same as used in many engines including some Fords. YAWIA

 

Agreed. With the 4.2 engine, the coolant must meet M97B44-D industry specs. If it does, it is usually orange in color. A number of different coolant products meet these specs. Just read the label on the jug. If it confirms these specs, you're good to go....

 

This link should help

Link http://www.jagrepair.com/images/Auto...sb_09_2003.pdf

 

You're in the UK - Halfords do an own brand OAT - just ask them to confirm that it meets the spec - from memory I'm fairly sure it does.

 

Thanks I checked on the Halfords site and they list a Premixed and a concentrate OAT coolant, but don't quote the specs for either. The one I referenced on Amazon quotes JLM209723 but not M97B44-D. I think I will order it and return if it isn't M97B44-D.

 

Just changed mine and used Total Coolelf which is orange Bought it off amazon uk.
Tommy.

 

What color coolant does your car currently have? Do not mix coolants.

 

There is no standard for colours, so if you don't know what coolant is in there, drain the whole system and flush it with a coolant flush. Then you can re-fill with anything you want. You've got loads of choice in the UK from Amazon and Halfords of different coolants to use, as has been said, just make sure its the spec that is in the manual.

BTW if you don't know when the thermostat was last changed, now is a good time to change that as well.

 

I dont actually understand this warning "dont mix coolants". If all the coolants, whatever the source meet the spec (Halfords DOES by the way - they have a huge book next to their antifreeze stock, just gotta marry it up to your model) then for topping up purposes, whats the difference? Just asking! I know probably someone here will offer some kind of technical horror story that tells of engines becoming terminally sick because of mixed fluids but in the real world, Really?

 

Mixing green coolant with orange coolant (i.e ethylene glycol mixed with whatever DexCool is; usually the colors are used for different chemicals) causes the fluids to react and become a thick viscous slime that does not flow through the system. Essentially, if it can't flow it can't displace heat and may ruin your engine.

Just make sure that whatever you put in is the same stuff you already have. If you're unsure, properly flush out the system and add the correct coolant specified in the manual.

 

'Meet the spec' is the key phrase. If two different coolants do meet the same spec, they are fully interchangeable. Colour, brand name, etc. are irrelevant.

The technical horror stores do exist, but always with coolants of different specs.

Rather than buying coolant under Jag's part number JLM209723 use the coolant spec mentioned in the owners manual, M97B44-D in this case. Much cheaper and easier to find. Jag does not manufacture their own coolant or use a proprietary spec.

 

In the Jaguar Vehicle Specifications book (dated 9/2003; see attachment), it states that XK8s -and- XKRs from MY 2000 to 2003 are spec'd to use a coolant that meets WSS M97B44-D, and the stuff I buy at Wal-Mart for about $15 meets that spec (also see attached pic and URL).

I've seen the much more expensive MotorCraft Orange (about $30 or so) that meets that spec, but, why pay more? If there is a good reason to do so I will. Otherwise, I get the DexCool at Wal-Mart (used in my 2000 XK8).

Prestone Dex-Cool Extended Life Antifreeze/Coolant, 1gal - Walmart.com

BTW, this coolant is also spec'd for SOME pre-2000 XK8s and XKRs as you can see, so check the numbers carefully. Also, since this specification book was published in 2003, there are vechicles beyond the 2003 MY that will use this coolant as well; seems to me I've seen elsewhere that it is used up to 2007 MY in some Jags.

As others have stated many times, "READ YOUR OWNER'S MANUAL" for the correct coolant to use.

To toss a red herring in here, it has been seen on other forums that newer HOAT coolants are a superior replacement for OAT coolants (this Dex-Cool, for instance) in all vehicles, but, I cannot confirm that without more research.