[x300] X308 thermostat tower seals and water pump

Hi all,
I am replacing the plastic thermostat tower with a cast
alloy one which I purchased second hand. I will need to
replace all the ‘‘O’’ rings, gaskets and thermostat as I go. I
have checked out the suppliers web sites, JL archives and my
totally useless parts manual on CD which has no part
numbers!

Could anyone assist with the part numbers for the thermostat
and seals?

While I’m at it I would also like to update the water pump
to the all metal impeller type which was fitted to the 4.2L?
Are they a straight replacement fit? and what is the part
number?

Thanks,
Paul.–
Paul Tomlinson. 1975 XJ5.3-C, 1998 X308 Sport 3.2L.
Bathurst, NSW, Australia
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

In reply to a message from Red Phoenix sent Fri 25 Nov 2011:

Hello Paul,
I’m assuming as you bought the alloy replacem,ent sans seals?
The thermostat # is:
THERMOSTAT: AJ81328
SEAL: NCA2246BA
As for replacement seals for the thermo housing itself, I would
suggest you contact these people:
http://www.britishparts.co.uk/.sc/ms/cat/Jaguar%20XJ8%20-%20XJR--
Cooling-Heating/2

http://www.motorcarsltd.com/AJ82217.KIT.html

A word of advice…do you REALLY need to replace your water pump?
The reason I ask this is because there is an awful lot of
misinformation out there about AJV8 water pumps!

You may find the following information worth a read before you dive
in and go replacing bits unecessarily ;o)

The following is taken from a Jaguar Technical Bulletin:

Engine - Coolant Pump Replacement Guideline

303-60

DATE 02/03

V8 XJ Series/XK

MODEL
1997 MY-ON XK8 Range
1998-2003 MY V8 XJ Series

VIN
001001-ON
812256-F59525

Coolant Pumps - Identifying Impeller Material - Pump Replacement
Guidelines

Issue:

A large number of V8 coolant pumps are replaced unnecessarily for
the
following reasons:

  ^ routinely following an engine overheat condition,
  ^ incorrect diagnosis of leakage, or
  ^ incorrect identification of impeller material.

As a result, a significant proportion of warranty returns have been
identified with no fault found.

Action:

Note the following guidelines before replacing a V8 coolant pump:

OVERHEATING

Before replacing the coolant pump following an overheating
condition,
observe the following guidelines:

VIN 001036-028000 (XK series) and VIN 812256-843500 (V8 XJ series)

Check the part number on the body of the coolant pump, following
the
procedure below. Replace the coolant pump if the part number is:

96JV-8501-CA,
96JV-8501-CB,
96JV-8501-CC or
96JV-8501-CD

  1. Check coolant pump part number. If any of the part numbers
    are as follows:
    96JV-8501-CA, CB, CC or CD, replace the coolant pump…

NOTE:…thi site won’t allow the inclusion of pics so…look down
the left side of the pump on the mounting flange with a bright
torch.
You will see the model number.

VIN 028001-on (XK series) and VIN 843501-on (V8 XJ series)

It is not necessary to remove the coolant pump pulley for
inspection unless there is a genuine coolant pump concern.

Do not replace these coolant pumps as a matter of Policy.
LEAKAGE
Note: Do not assume that staining around the exterior of the
coolant pump body is due to a coolant pump leak.
Check the cooling system joints, for leaks, in the area above the
coolant pump. …]]
If you want to replace the thermo tower, you will have to bend the
ring head of an 8mm spanner at 90 deg. to be able to get at the
rear bolts but if you are game you can do what another of our
Aussie compatriots rom Perth has done by removing the ten bolts
holding the inlet manifold in place and lifting the front jut
enough to be able to reach the rear tower bolts with a socket.–
The original message included these comments:

Hi all,
I am replacing the plastic thermostat tower with a cast
alloy one which I purchased second hand. I will need to
replace all the ‘‘O’’ rings, gaskets and thermostat as I go. I
have checked out the suppliers web sites, JL archives and my
totally useless parts manual on CD which has no part
numbers!


Max Heazlewood '98 XJ8 4.0L Sovereign Sapphire Met./Oatmeal
Tasmania, Australia
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

In reply to a message from Exjay8 sent Fri 25 Nov 2011:

Max,

I agree there is a lack of clarity over the pumps, not helped by
every pump I’ve seen offered on the market having a metal impeller.
Even a metal impeller can still fall off and cause overheating.

It is hard to know which type or make is the best. Your information
is useful, thanks.

Regards

Steve–
Jags on gas
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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In reply to a message from Jags on gas sent Sat 26 Nov 2011:

Steve…precisely!
There are too many dodgy operators selling god knows what!
According to Jaguar, both the Black Poly Phenyl Sulphide # 843501 -
840500 and the White Poly Phenyl Sulphide # 840501 - F59525 are
perfectly acceptpable…the latter making sure it is accompanied
with the steel black coated gasket.
The longevity of the pump is exemplified by the use of the correct
type and strength of coolant.
Most ‘supposed’ pump failures have been accredited to poor or non
existant maintanance schedules and changing of the coolant at the
correct factory reccomended intervals.
As always, these ‘pub talk’ stories abound and are circulated often
enough so that to the ill informed they become gospel.
This of course leads to unfounded stories of Jaguar using poor
quality parts which in most cases is not true!
I can just hear the wail of bleating lambs in the background
already ;o)=)

Cheers,
Maximus–
The original message included these comments:

Max,
I agree there is a lack of clarity over the pumps, not helped by
every pump I’ve seen offered on the market having a metal impeller.
Even a metal impeller can still fall off and cause overheating.
It is hard to know which type or make is the best. Your information
is useful, thanks.
Regards
Steve
Jags on gas


Max Heazlewood '98 XJ8 4.0L Sovereign Sapphire Met./Oatmeal
Tasmania, Australia
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

In reply to a message from Exjay8 sent Fri 25 Nov 2011:

Hi Max,
Thanks for all the info, it is very helpful.
My vin is- 852019.

One number I found was below the pump pulley and is-
9?JV-6059. Question mark is because the second figure
appeared to be a square. There was no number stamped on the
pump body that I could see. I did find another number
stamped behind the pump and that is- 980712-0954

Thanks again,
Paul.–
The original message included these comments:

Note the following guidelines before replacing a V8 coolant pump:
OVERHEATING
Before replacing the coolant pump following an overheating
condition,
observe the following guidelines:
VIN 001036-028000 (XK series) and VIN 812256-843500 (V8 XJ series)
Check the part number on the body of the coolant pump, following
the
procedure below. Replace the coolant pump if the part number is:
96JV-8501-CA,
96JV-8501-CB,


Paul Tomlinson. 1975 XJ5.3-C, 1998 X308 Sport 3.2L.
Bathurst, NSW, Australia
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php