Radiator Cold In The Middle But Hot Either End?

[ATK 143 1 Cars]

Noticed the other day my rad is cold in the middle, and hot on each end. Its only the middle 1/3rd that is cold.

 

Car never overheats, fans kick in when they should and gauge is where it should be.

 

But rad should be hot all over surely?

 

Whats the likely cause - blockage in the rad itself?

[mikeyd 13]

most likely a choked rad tbh

[Tom Fenton 1,548]

Should be even temp all over, for what they cost bin it & fit a new one.