Radiator venting issue

[m_coops]

In order to refit my kitchen I had to remove one of the radiators. I have now replaced the radiator and re-connected, however it is only getting hot in the lower half. I understand that I need to vent the air out, but the problem is this - there is no vent at the top of the radiator (in fact, in any of the radiators in the house).

How can I vent the air out of the one radiator ?? (Surely I don't need to drain the entire system ?? but then surely you may get air locks anyway).

Help appreciated.

 

[Bahco]

There will be a vent on the top somewhere probably covered with a plastic cap.
Run your finger along the back and you should find it.
You will need a key to bleed.