2000 Discovery Overheating

[Salonika]

I'm a Mitsubishi owner posting for a friend with a Rover. What is the most common cause of overheating with these rigs? He can idle in the driveway with no overheating but cannot make it 2 miles down the road without pegging the temp gauge. Any ideas would be appreciated.

 

[mep1811]

Has the fan clutch been checked? Thermostat ? Cooling system flushed? Hoses not rotten and clasping and impeding flow under pressure ? Water pump good?

 

[Happykamper]

X2 above. There are a number of reasons these temperamental but great rigs overheat. You need to check everything . But mostly you need to stay vigilant by being proactive on these very capable beauties. Remember pay cash for them as your going to have a monthly payment anyway ...but in my opinion well worth it .

 

[adelatoa]

Check the reservoir and cap, if possible just change both of them as it's cheap insurance future anyways.

 

[jymmiejamz]

Assuming the thermostat isn't bad and the cooling system is full, the next most likely thing is a cracked block.

I would not recommend just throwing parts at it without actually trying to diagnose the problem.