Originally Posted by
adnic
something i noticed no one mention is the heaters in the discos suck & more times than not because of a lack of use in australia they corrode in the matrix & supply pipes which are under the dash & run through the firewall.
when this happens it deposits aluminium dist through the engine & ends up in the rad blocking the vanes.
this in turn leads to overheating & although simple enough to fix, alot of people misdiagnose it & spend a fortune doing heads & the like searching for the prob.
one of the simple tests is turn the heater on to full once the motor heats up & see if the drivers floorwell gets wet.
the pipes lead out from the drivers side.
like i said, easy to fix. disconect the pipes at the firewall on the engine side & join them & have the rad cleaned. don't need a heater here anyway!!
good luck.