My '04 disco (also have an '03) has at 97k miles suddenly developed an external coolant leak. The front hoses, water pump, coolant reservoir, top of engine are bone dry. It only started using ANY coolant several days ago. It only leaks occasionally and drips in the driveway from the BACK of the motor. After cleaning the engine the highest point of a drip is around the exhaust manifold, driver side.

Any thoughts?

 

You have a valley pan and or head gasket failing. Don't waste a lot of time getting it checked and repaired, last thing you want to do is think about it until you toast the engine.

 

Mike:
Thanks for the reply. Naturally the extended warranty just ran out!. The visible head gasket on both heads (outside of block) is quite dry, no coolant trails. The coolant loss though is now high (pint /50 miles). No mayonaise in the oil, no streaks in the coolant, no overpressure (flow out of the overflow tank), no fault codes no coolant out the front near the water pump. Coolant drips exclusively out the very rear of the engine on the drivers side only, puddles under the transmission.
In view of the above is that more likely the valley pan gasket?? Big job ?
thanks again