Procedures for filling and bleeding the cooling system are in the factory repair manuals which can be found here:
http://www.lotus-europa.com/manuals/index.htmAs the high point on TC equipped Europas is right above the thermostat, it is easier to fill and bleed. I would still remove the temp sensor as filling myself.
Renault equipped Europas are another matter entirely. The thermostat is not the high point and air locks are guaranteed if not bled correctly. This leads to overheating, head warping, etc, and the notion that the Renault engine is not reliable. Funny really, as Renault was always careful to include the required bleed valves and outlined everything necessary in its manuals. Bled properly, there are no issues.
Don't wing it. Fill and bleed a Renault engine properly.
If you have modified your engine, or have no idea if a PO might have, basically EVERY high point in the system requires a bleed valve. There are usually two or three at the engine and one at the rad. Fill the cooling system with these bleed valves open as well as the heater valve. Close as each starts to flow clear coolant without air bubbles. Start the engine. As it warms up, open each bleed valve in turn to release any air. Do this repeatedly and keep the coolant level up as well.
The cooling system is fully bled when:
- the thermostat is fully open,
- the heater is blowing hot air,
- each bleeder valve when opened releases only clear coolant with no air bubbles.
