MG50

I am a fairly new owner of my TF135, 2003. I am doing a few jobs during the winter months including fitting stainless steel underfloor pipes.

I drained the cooling system when it was cold. I have refilled the system but it has only taken about 8.75 litres. I have bled all three bleeding points.

As I drained the system when the engine was cold was some coolant retained in the engine, accounting for the difference between the 8.75 litres I put in and the stated capacity of 10.5 litres? I am obviously concerned that there is still some air in the system somewhere.

Any advice would be much appreciated.