[x300] running hot

Actually, living in Alaska, I have never noticed my cooling
fan running until recently. I notice it running while the
engine is running. And when I shut the car off, it comes
back on for up to 5 minutes.
The temp gauge is about dead center on scale, and as I
remember used to run at least a half a mark below that
center line.
The other day, after an 80 mile round trip, my first stop
light back in town sent the needle a mark and a half above
center while idling. It came back to center after I started
rolling again.
Having read previous posts about water pumps, I wonder if
this could this be an indicator that my water pump is crying
out for replacement before it actually dies? Could it be as
simple as a thermostat?

Car is 2001 XJ8 4.0, with 85,000 miles. Water pump and
thermostat are original.
It�s garage parked Nov. 1 till April 1, so no extremely
cold starts.

And, what is recommended as a repair/technical manual in the
event I want to try to wrench some of the work myself.
Thanks all,
Keith–
moon345
Anchorage, AK, United States
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In reply to a message from moon345 sent Fri 18 Jul 2008:

Keith,

Definitely sounds like stat or pump, perhaps both. The perceived
wisdom is to get it seen to immediately. Do you know if your
engine has Nikasil liners or not? You cannot repeat, CANNOT rely
on the temp gauge. When my thermostat stuck, the gauge was
registering dead centre. Within 5 seconds, it shop up to the red
and by that time it was too late. The expansion tank exploded
blowing the heater pump clean off its mounting bracket and onto the
underside of the bonnet/hood causing a small lump on the top side
of the bonnet. You could have a stuck stat or, some vanes may have
broken off the water pump and be blocking the water jacket. Either
way, do yourself a favour and get it seen to immediately.–
The original message included these comments:

Actually, living in Alaska, I have never noticed my cooling
fan running until recently. I notice it running while the
engine is running. And when I shut the car off, it comes
back on for up to 5 minutes.
The temp gauge is about dead center on scale, and as I
remember used to run at least a half a mark below that
center line.
The other day, after an 80 mile round trip, my first stop
light back in town sent the needle a mark and a half above
center while idling. It came back to center after I started
rolling again.


http://www.jag-lovers.org/snaps/snap_view.php3?id=1195594467
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In reply to a message from moon345 sent Fri 18 Jul 2008:

In addition to Gary’s good advice, and to answer your other
question-
‘‘And, what is recommended as a repair/technical manual in
the event I want to try to wrench some of the work myself.’’

I Have the JTIS CDs which I use from time to time, but I
much prefer Alldatadiy.com. While it is a subscription and
thought to be a little pricey by some, compare the annual
charge to a visit to the dealer and it seems a good
investment to me. Alldata is not set up for the absolute
amateur like say, Haynes, but it is fairly accurate and
complete, although the drawings and procedures some times
loose out in the ‘‘left side- right side’’ / ''driver’s side-
passenger side ‘’ translations.
And, I have found that no more special tools are needed on
my Jags than on my Ford truck. If you follow the
procedures, working on a Jag(with the POSSIBLE exception of
some of the electronics) is about like any other car, only
the parts are harder to get.–
The original message included these comments:

And, what is recommended as a repair/technical manual in the
event I want to try to wrench some of the work myself.


Ross - 89 XJS, 95 XJ6, 98 XJR, 02 XJ8
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In reply to a message from moon345 sent Fri 18 Jul 2008:

Thanks for the advice guys.
I haven’t driven it since I reported the problem, so think
all will be ok.
I’ll get it into the shop this week. I’ll save the
wrenching for another time. Besides, I’m enough of a
mechanic to be dangerous.

And thanks for the info on repair/tech sources. I will have
something in hand before I tackle a project. What’s the fun
in owning a Jag if all you can do is drive it.
Have a great weekend!
Keith–
moon345
Anchorage, AK, United States
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