The factory mechanical fan is better than any thermo fan.
Mount the electric fan on the front and reinstall the factory fan.
If than doesnt work, get the radiator 'rodded' and professionally flushed.

Coolant does not keep the temps down. Coolant (instead of plain water) prevents it from freezing and prevents corrosion.

Tight valves do not cause overheating. But they can cause the engine to die. After changing the head gasket, adjust the valves before driving it!

Where should the temperature gauge should be for a new fitted a15? In the dashboard or under the dash is the usual place. The temperature sender should go in the stock location, although it can also be fitted to the front or back of the cylinder head ( it should go into the cylinder head). Don't fit the sender to the radiator hoses, as you want to measure the engine temp, instead of the radiator temp. The radiator temp will go up and down as it is NOT regulated by the engine thermostat.

Yes fan blades spin in the right direction.
I Dont think the electric fan is the prob i'm running electric fan plus engine-driven fan it has a thermo onto it too.if i remove the electric fan it might even work better?i'm leaning toward a larger radiator.

#1 Collant will it keep temp down?
#2 Tight valves?
#3 Where should the temperature gauge should be for a new fitted a15?

Or disconnect the electric fan. The stock engine-driven fan is plenty powerful enough for an A15.

You may need larger radiator but are you sure the electric fan blades are pushing or pulling air the correct way

Hi i have a rebuilt A 15 that i have now put it It has pulley fan plus iv'e installed a new electric fan yesterday.i don't know if the engine has tight valves,It traffic it goes up past half then when i start to drive again it goes a little way down If any 1 knows problems that will cause that ?