Hi.
I've just bought a 1998 R reg Rover 620 Ti (to replace my old M Reg Rover 620 Ti) and whilst it seems generally sound it has a problem with overheating.
It generally runs a lot hotter than my old Rover, though this is possibly due to the air con radiator partially blocking the flow of air to the main radiator. My old Rover Ti, which doesn't have aircon, used to drive along with the temperature gauge about 1/4 to 1/3 of the way up, and never overheated. This one drives along with the temperature gauge about 1/2 of the way up and rises very quickly as soon as I'm stationary - not a problem so long as the fans kick in, but this doesn't always happen.
When I parked up for a while after a long run a week or so ago the temperature gauge rose into the red and stayed there until I could hear (and see, when I opened the bonnet) the coolant boiling - I later discovered I'd lost about 2-4 litres of coolant. Scarily the engine was still running at this point, and hadn't cut out.
The overheating seemed to be happening because the fans weren't kicking in when they should, so I replaced the fan sensor switch (larger brass- coloured part next to the smaller temperature gauge sensor).
However, the fans still aren't coming in when they should, which is bizarre - anyone got any ideas?
(there's a load of insulation tape around the wiring to the fans, so somebody might have done something to it at some stage)
I'm loath to leave it with a garage as chances are they'll leave it running and damage the engine if it overheats without cutting out...