[xj] V12 thermostat

Victor:
Thanks for this report of the too-high temperatures on the V12 engine,
and your fix. It is a good reminder that the V12 engine MUST have the
distributor properly serviced so that the vacuum advance is working as
designed. This is an important factor in driveability as well as temperature
control. Your elevated warm-idle RPM was a sure sign that the auxiliary air
valve was past its prime (for those with a V12: if the adjustment bolt on
the AAV is turned all the way in, and still the idle is too high, the valve
needs to be replaced or rebuilt; the cost of a rebuild kit from Australia
approaches the cost of a new valve).
Thermostats: it is common practice to use 82 degree thermostats for the
V12 in Canada, so there was nothing odd about that. But you obviously had
faulty ones. An engine running below 80 degrees will use considerably more
fuel than it was designed to use. I hope that the thermostats you put in had
the correct extension on them to close off the by-pass pipe. Even ordering
thermostats from Jaguar with the correct part number will not ensure that
you get the right ones. Now that their North American supplies have been
centralised in California, all sorts of mistakes are happening. I was
supplied TWICE with the wrong thermostats, but in the right boxes, with the
right numbers.
Gregory----- Original Message -----
From: “sparkyjag” sparkyjag@rogers.com
To: xj@jag-lovers.org
Sent: Monday, November 24, 2003 10:01 PM
Subject: [xj] Wahler thermostat

: Anyone have any experience with this brand of thermostat? If so,
: beware and test.
:
: I had some overheating problems with my vehicle which I purchased
: last year. Tended to run a bit hot - around 91C to 95C with the
: temps increasing as I took it out on highway speeds. I had the rad
: recored and replaced the clutch and fan due to the usual problem of
: cracks. Ran much better but still would run above 88C when on the
: highway, up to 92C. Also the RPMs in idle were quite high. Had the
: distributor and vacuum advance overhauled (not advancing) and the
: AAV overhauled. Result: much improved power, fuel economy and MUCH
: lower coolant temperatures. How much cooler? I could not get the
: coolant to go over about 70C!!!

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: http://www.jag-lovers.org/lists/search.html

To remove yourself from this list, go to http://www.jag-lovers.org/cgi-bin/majordomo.

// please trim quoted text to context only

Gregory,

Do you have a PN for the correct thermostat? Also, do you know of a
supplier that can reliably get the correct ones -or is it just a matter of
ordering the thermostat from Jaguar and hoping for the best?

Jim

Gregory wrote:
I hope that the thermostats you put in had
the correct extension on them to close off the by-pass pipe. Even ordering
thermostats from Jaguar with the correct part number will not ensure that
you get the right ones. Now that their North American supplies have been
centralised in California, all sorts of mistakes are happening. I was
supplied TWICE with the wrong thermostats, but in the right boxes, with the
right numbers.===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: http://www.jag-lovers.org/lists/search.html

To remove yourself from this list, go to http://www.jag-lovers.org/cgi-bin/majordomo.

// please trim quoted text to context only

Jim:
Get them from Jaguar or other supplier: Part # EBC 3576, sold as a pair
by Jaguar. These are 82 degree Waxstats with the proper extension. My cost
was $42 Canadian, very reasonable. You also need two new gaskets: EBC 8331
and 8330.
Gregory----- Original Message -----
From: “James Frey” jmfrey@alltel.net
To: “XJ Distribution List” xj@jag-lovers.org
Sent: Tuesday, November 25, 2003 6:35 PM
Subject: RE: [xj] V12 thermostat

: Gregory,
:
: Do you have a PN for the correct thermostat? Also, do you know of a
: supplier that can reliably get the correct ones -or is it just a matter of
: ordering the thermostat from Jaguar and hoping for the best?
:
: Jim

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: http://www.jag-lovers.org/lists/search.html

To remove yourself from this list, go to http://www.jag-lovers.org/cgi-bin/majordomo.

// please trim quoted text to context only