G’day All,
Recently I have been having some troubles with my 1984 XJ6 overheating
when stationary at idle for any extended amount of time. The weather
here in Oz isn’t quite hot enough yet for me to believe that it
contributes to the problem.
In the last two years there has been considerable work done to the
cooling system. The radiator has been re-cored, the heater matrix has
been replaced, new fan and clutch have been fitted. The head and intake
manifold/water rail has been overhauled after the head gasket let go.
All the coolant hoses have been replaced, as they all blew out. The
cause of this was a blockage in the overflow line from the header tank
to the expansion tank in the wheel well. This appeared to
over-pressurise the system, which in turn caused the blowouts. This has
since been rectified.
The problem only appeared after I had the transmission overhauled due to
a chipped planetary gear. I highly doubt that these events are linked.
Since then a new thermostat has been fitted, with no success. The
thermostat has been verified to operate correctly.
So in short, the car overheats when stationary at idle. It does not
matter if the air conditioning is turned on, or if the car is in
neutral, it will gradually work its way up to about 105 degrees celsius.
If the engine is revved up to about 2000RPM, the temperature drops
rapidly to settle at about 95 degrees celsius. Once back on the move the
temperature is stable at 82 degrees.
Is it possible that my radiator could have a blockage in it so soon
after being re-cored? Is it possible the water pump could be plugged up
with sludge and is failing to circulate adequately at low RPM? These are
the last two areas I can think of which could be the root of the
problem. Any suggestions?
Cheers!
Grant Watson
1984 XJ6 Series III
- In Western Sydney, Oz===================================================
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