Hi all
Next job is changing the coolant…
I know the knowledge is out there!!!–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
The coolant that is currently in the car is a sort of blue/green
colour–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Alex,
It’s important to get the right antifreeze for your model year /VIN
number. The earlier cars used a yellow antifreeze; the later post
2000 cars used an orange long life type. These must not be mixed or
the later type used in earlier cars.The blue/green antifreeze is
very old and was phased out - from memory I don’t think the XJ8 was
supposed to use that type.
What is our VIN number? - I will look up the correct type on the
XJ8 CD ROM
Regards,–
The original message included these comments:
The coolant that is currently in the car is a sort of blue/green
colour
–
Brian: '99 XJ8 4 litre, West Sussex UK
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Hi
My V.I.N. is SAJJHAMD3CR847979.
From the receipts I was given by the previous owner, the coolant
was last changed in Feb 2003 by Guy Salmon in Oxford.
It is definitely a sort of greeny blue colour? I would have though
that Guy Salmon would have put the correct stuff in???
Hope this helps you Brian–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
In the car handbook it says to use antifreeze/corosion inhibitor
to ‘DOW D542’ specification? Can’t find that number on any bottles
in Halfords???–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
D542 is a test method for coolant specific gravity, it is not a
coolant type. Jaguars after 1996 should use Dex-Cool orange coolant
according to Zerex. Jaguars before 1996 use G-05 HOAT yellow
coolant. Blue coolant is often used by dealers and it is the
cheaper aftermarket ‘‘Peak’’ brandname coolant. Nothing wrong with it
but it is not the long life stuff, it is a two year coolant. The
Dex-Cool and G-05 coolants are 4 year coolants. As was indicated,
do not mix up these coolants or use the wrong ones, cars don’t like
it and can have colling system problems. You can tell if you have
the longer life coolant, it costs more. I used to buy Jaguar
coolant form the dealer until I found out it was G-05. I was paying
$38 per gallon for Jag coolant for my 96 and the Zerex G-05 is $12
per gallon…same stuff, different jug (the Jag jug was nicer
looking in my opinion but the cost difference overcame my design
sensitivities).–
Brian Caro 96XJ6 4.0 63E-TypeS1FHC
Newport News, VA, United States
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In reply to a message from Brian Caro sent Wed 13 Jun 2007:
OK…so what should I put back in the car…I get the point re
not mixing coolant types.
I presume I just take the top off the header tank and pop off the
rad bottom hose? or is there a screw plug on the bottom of the rad
to drain system?–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Brian Caro sent Wed 13 Jun 2007:
It just occurred to me that the Jag coolant jug is 5 US quarts, so
it is slightly less than $38 per US gallon which is 4 quarts.–
The original message included these comments:
coolant form the dealer until I found out it was G-05. I was paying
$38 per gallon for Jag coolant for my 96 and the Zerex G-05 is $12
per gallon…same stuff, different jug (the Jag jug was nicer
–
Brian Caro 96XJ6 4.0 63E-TypeS1FHC
Newport News, VA, United States
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Alex,
There is a screw plug in the bottom of the rad - both hoses are
near the top of the rad (at least on the outside) of the XJ8 rad so
pulling off the bottom hose won’t work.
I’m at work at the moment but I will look up the CD for your VIN
when I get home.
Regards,–
The original message included these comments:
OK…so what should I put back in the car…I get the point re
not mixing coolant types.
I presume I just take the top off the header tank and pop off the
rad bottom hose? or is there a screw plug on the bottom of the rad
to drain system?
–
Brian: '99 XJ8 4 litre, West Sussex UK
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In reply to a message from Brian Goodhew sent Wed 13 Jun 2007:
Thanks very much Brian.
I have a Jaguar JTIS CD myself, and it says for my X308 (1998) to
use Jag Antifreeze / Corrosion Inhibitor ESD-M97B49-A. And that it
should be renewed every 4 years.
The thing is I am confused by the colour of what is in the system
at present. It is a Greeny/Blue as I said and I have never seen
coolant of this colour before? So am I thinking that two types and
therefore colours have been mixed at some stage?
The JTIS manual between the lines sugests to me that the coolant is
the ‘longlife’ type, as it notes changing every 4 years or 60K.–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
I did some research on mixing the two types and you can mix them
but if you do, you lose the long life properties of the ‘‘red’’ stuff.–
Robert - S-Type 3.0SE, Mistral. Ex 1997 X300. Scotland. UK.
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Alex,
According to the JDHT CD that I have, your VIN number, like mine,
is in the ‘‘renew every 4 years/ 60,000 mile’’ category. I don’t know
if you are a JEC member but one of their recent Technical Topics on
the XJ8, taken from official Jaguar service bulletins, stated that
cars between VIN 812256 and 878274 use YELLOW coolant part number
JLM20404. This conforms to ESD-M97B49-A you mention, and ASTM
D3306.
The blue/green stuff you have right now sounds like old D985
coolant, which is no longer available and which was only used in
the early XK8. This should have been converted anyway by service
action S813 to use the yellow type. (of course it could be some
unbranded stuff, not genuine Jaguar that’s in there.)Contrary to
what other posts have said the JEC article warns against mixing,
because apart from shortening the coolant life the corrosion
protection is adversely affected.
I would not risk anything other than the proper Jaguar stuff in
your Cat -it’s not that expensive compared to risking cooling
system problems later (I was charged about �23 for 3 litres)
Regards,–
The original message included these comments:
I have a Jaguar JTIS CD myself, and it says for my X308 (1998) to
use Jag Antifreeze / Corrosion Inhibitor ESD-M97B49-A. And that it
should be renewed every 4 years.
The thing is I am confused by the colour of what is in the system
at present. It is a Greeny/Blue as I said and I have never seen
coolant of this colour before? So am I thinking that two types and
therefore colours have been mixed at some stage?
The JTIS manual between the lines sugests to me that the coolant is
the ‘longlife’ type, as it notes changing every 4 years or 60K.
–
Brian: '99 XJ8 4 litre, West Sussex UK
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In reply to a message from 12RM sent Wed 13 Jun 2007:
Hey thanks for that, makes sense.
I have spoken to Jag and my car SHOULD have the longlife red stuff
in it. Also the previous owner had the rad changed before I bought
the car…so the only deduction is that the idiots where he had
the rad done, put the blue coolant in.
Have just been and bought 5 litres of the red stuff, so tommorow I
shall drain the system and refil with the proper RED stuff!!!
Thanks all for your advice.–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
The rad was NOT done by a main dealer but by another non Jag
garage, so I have no idea what coolant they put in!!! So whatever I
put in the car from now on will be to Jag spec.
I have just got some’ESD-M97B49-A’ from the shops, this is
identical spec to the Jag stuff you mention. What I have just
bought is RED in colour, you say the Jag coolant is YELLOW. OK so
there is a colour differance. That doesn’t bother me as they are
both the long life type coolant and both conform to ESD-M97B49-A,
so apart from the colouring they are identical in their chemical
makeup.
Thanks all–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Red/green- I noticed that the original Jag coolant in my 2001 XJ8
looked green when viewed thru the expansion tank neck but when
drained was orange. Beware of this trick of light. Best to pull
some out and look at it thru a clear jar to see what’s what.
I replaced with Prestone Dexcool equivalent (silver bottle, orange
cap) same as is used by my folks’ local independent Jag shop.–
unimogbert
Ft. Collins, CO, United States
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In reply to a message from unimogbert sent Wed 13 Jun 2007:
Yup, did that. Got some out with an old syringe!–
Alex Kitney
Calvert Green, Buckinghamshire, United Kingdom
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Is there an o-ring on the plug that you should have on hand just in case? I
have another brand car that needs an o-ring each time you empty the rad
because while backing it out the o-ring gets cut on the very threads that
hold the plug in.
Jack - '99 XJ8L
York, PA USA
< snip >
Alex,
There is a screw plug in the bottom of the rad - both hoses are
near the top of the rad (at least on the outside) of the XJ8 rad so
pulling off the bottom hose won’t work.
I’m at work at the moment but I will look up the CD for your VIN
when I get home.
Regards,
< snip >–
Brian: '99 XJ8 4 litre, West Sussex UK
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< snip >
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.472 / Virus Database: 269.8.14/845 - Release Date: 6/12/2007
6:39 AM
In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Dear Alex,
I think this red stuff (Dex Cool) needs to be higher than
90% in the coolant part of the concentration. You may want
to put deionized/distilled water a few times to clean the
system before you do a final fill. I think the total
capacity of the cooling system is 10 liters and one drain
can get about 4 liters out from the system. I did a simple
calculation to determine how many times I have to flush with
water to reduce the residual concentration, but I forgot the
number. I think it was like 3 or 4 times.
And Jack’s comment is an excellent one, have another O-ring,
just in case.–
Momo (or 100 when written in Japanese Kanji), '98 4.0 XJ8 L
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
What I said above may not be very clear. The recommended
concentration is 50-70% (50 is good) and 90% or higher of
that needs to be DexCool.–
Momo (or 100 when written in Japanese Kanji), '98 4.0 XJ8 L
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In reply to a message from Alex Kitney sent Wed 13 Jun 2007:
Be careful, the yellow and red/orange coolants are not the same
chemistry and they do not mix well. Yellow is HOAT or Hybrid
Organic Acid, Dex Cool or the red/orange is not the same, I am not
sure what it is but it is not HOAT. Your car should use the Dex
Cool.–
Brian Caro 96XJ6 4.0 63E-TypeS1FHC
Newport News, VA, United States
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