Join Date: Aug 2015
Car: 99 MGF & 03 MGTF 135
The first thing to do is have a Vehicle A/C engineer de-gas the system. Most good companies will do that beforehand if you use them to pressure test, vacuum and re-charge after the work is complete. Cost should be around £70-£90
Once the system is de-pressurised, the bolts you see in the engine bay may be removed and the Expansion Valve removed. This will free the pipes and allow the Evaporateor to be removed from beneath the dash.
You may also need to remove the Heater Matrix.
Hope that helps.