Water cooling issue (help)

[Bingbing10]

For the last few months I've been having intermittent issues with my cpu cooling . I've got a cooler master seidon 120mm and what happens is that my temp randomly rocket and then my PC shuts down . 

 

Ive taken it apart on two occasions and then reapplied thermal paste and sometimes this seemed to work . I'm really struggling and could do with some help . Cheers guys 

[Enderman]

sounds like your pump is failing

probably replace the cooler

[Cyracus]

What Enderman said, I'd recommend a good air cooler or stepping up to a 240/280mm rad, 120 and 140mm rads cost as much as good air coolers usually but can't perform as well, not to mention if an air coolers fan dies the heatsink still works to cool your system unlike a water cooler with a shot pump