Land Rover Repair: 97 DISCO OVERHEATING, fluid leaks, excess pressure

Question
Hi,
I just took my Rover on a trip of about 400 miles. Half way
home it ran hot up to red so I filled it w/ coolant and it still ran
hot. I took it to a shop and they said there is a crack in the top
of my resevoir and it needs to be replaced for $200 including
labor. I got a second opinion and they said that the resevoir has
to be replaced but also the p/s hight pressre line is leaking, the
trans cooler line is leakingx2 and the oil cooler line is leaking.
Would the resevoir be the only thing herre to cause the car to car
to overheat or are these lines also a must to get fixed if I want to
see my truck run without overheaing again?   Thanks for all you
do, Justin

Answer
The second shop is telling you about other fluid leaks, having nothing to do with coolant or overheating.  Despite that, if the car has the leaks they say it does, they are doing you a service telling you about them so you can fix them before they blow out.

However, they don't have anything to do with today's overheat trouble

If the coolant reservoir has a crack by all means change it, but cracked reservoirs sometimes result from excess pressure in the system as a result of other trouble.  Be careful and keep an eye on the gauge when you swap that reservoir.