Hi

First time on here. Not owned the car long. 

I had a problem today with the coolant on my Daimler. She’s a 1996 Double Six. 
Smoke was billowing out, when I lifted the bonnet I saw the top right pipe to the rad had come loose. Iv re attached and filled the level up. Seems to be working. Iv also had the coolant level sensors coming on since I bought her even though the level was full. 

I’m going to flush the full system this week. I’m just looking for info on the best material for flushing, and re filling, with the best coolant for her. And the procedure for doing this. 
Iv also ordered a new pipe and clips. 

Thank you for your time 

Hi Tom.

The best method is to back-flush the cooling system, so insert a hosepipe into a coolant hose in the reverse direction of the normal coolant flow, turn the heater on hot and disconnect the other main hose.

In theory any deposits that could be blocking the system are dislodged and come out in the reverse flush. You shouldn't run the engine for this task.

You can use an additive to clean it out at the same time but I have never used anything. Be careful to capture any antifreeze to reuse and not allow it to enter the drainage system, etc.

Reconnect the hoses and fill with coolant, run the engine and test for leaks.

It may also be worth replacing the coolant pressure cap as well as this can lead to coolant loss (loss of system pressure)