Cut out the blowholes with the shearers:

23 Making a Shroud for your Radiator

Next, we cut out a strip to separate the 2 blowholes so that we get maximum
airflow:

25 Making a Shroud for your Radiator

29 Making a Shroud for your Radiator

After screwing on the fans:

31 Making a Shroud for your Radiator

Slipping on the shroud over the radiator, our project is completed!

34 Making a Shroud for your Radiator

Much thanks to soki for sharing this nice mod with us!