The problem with the 1.8s is caused by the thermostat. It is not correctly influenced by the actual temperature of the engine and when it finally realises that the engine is getting hot and opens it sends cold coolant from the radiator to a very hot engine which causes thermal shock to the the head - remember we have always been taught not to put cold water in a hot engine - well this is what the thermostat does. If the head gasket hasn't blown from the hot engine then it will from the thermal shock - the problem is this is often not noticed and if the engine gets really hot the cylinder liners slip destrying the engine. This problem also happens to the MGF and the Lotus Elise which also have the same engine - it is less of a problem though.
Engines normally last between 30,000k to 100,000k and it happens time and time again - good servicing is no preventative. So the odds are that this has already happened to your car at least once.
The fix is a modified head gasket, a modified termostat system and very regular maintenance of the cooling system and never, never allowing it to get hot. This apparently fixes the problem.
There is also a design issue in the drivetrain of pre 2000 models. All cars AWD cars with viscous couplings have different front and rear diff ratios. In your model the difference is too great and the VC has to work hard to compensate with the result that it fails at about 130,000 km and locks up causing tarnsmission windup. This causes the IRD (Transfer Case) to fail with expensive results - though a VC is 1 1/2 times the cost of the IRD. The only way of stopping this is to check the VC every few thousand km and replace if suspect or replace the IRD from a later model (I have done this after mine failed).
See http://www.ashcroft-transmissions.co.uk/category_8.html
Fore warned is for-armed and all is manageable just as most of the Landrover design issues are managable.
Overall the car is great.
Garry

