I need to know which way round the thermostat goes into engine.diagrams would be helpfull

Follow the top and bottom radiator hoses. Goes goes to the thermostat in a round about way which is right on the top of engine behind the EGR valve. Bottom hose goes right to the waterpump, easy access from underneath. The temperature sensor is located on drivers side mid engine. Look through drivers tire wheel well, you can see the sensor, brass fitting. A note, the top hose where it's attached to the thermostat is metal....tends to rust out, just get a new one and snake it back through there.

thermostat will prob need changing, idling engine can run ok without the thermostat opening but when the engine is being used the temp will go up. but with out the thermostat opening the water will not flow round fast enough to cool down.

GO TO GOGGLES, TRY TO LOG TO CHARADE 1000CC SCHEMATIC DIAGRAM FOR CABURATOR.

With conventional cooling system, the upper radiator hose goes to thermostat housing on the engine. You drain antifreeze down, a little, remove radiator hose from thermostat housing, remove thermostat housing, the thermostat should be inside the housing.
Some antifreeze is poisonous, dispose of properly.
Install new thermostat, hook everything back up. Add proper amount of antifreeze to the proper mark. Keep an eye on antifreeze level for a while till your sure all air worked out of the system.

Check this diagrams, look for "to a/c and heating systems", could helpfull (click over image for zoom)...

Fig. 6: 1995-97 4.6L engine schematic

Fig. 7: 1998 4.6L engine schematic


Good luck.

Yes it matters. The bleed valve must piont straight up. If it is not in the correct position, the cooling system will get an air pocket and cause overheating. (See diagram)

the body of the thermostat goes in towards the engine block ,do not fit it the other way round as engine will overheat

Most of the time a thermostat is located where the radiator hose goes into the engine block on top of thr engine not underneath the radiator.

Iv the engine is not getting up to operating temperature and it is full of coolant (50/50 mix of coolant and water) the thing to check would be the thermostat. Where the hose comes off the top of the radiator and goes into the engine block there will be a round top housing there very close that houses the thermostat. Take off the housing and remove the thermostat. Place the thermostat in a pan of water on the stove and heat the water. Watch the thermostat. If it does not open when the water gets hot it is defective.

Follow the top radiator hose to the engine. This is where the thermostat housing is located. Remove the bolts and take out the thermostat. When you get your new thermostat, get one from Autozone with a jiggle valve. The jiggle valve should be oriented near the top of the housing (the thermostat is not perfectly round, you'll have to play with it a little to get it to seat). Install with the spring side facing the engine and the gasket on the engine side of the housing. You can use some spray adhesive to keep the gasket in place while you install the thermostat.