Problems with Custom Loop Cooling

[Merun]

Hello everyone. In 2016 i built myself a custom liquid cooling loop which today cools both my CPU and GPU. The loop contains a 240 rad, soft tubing, EKWB's small EK-XRES 100 pump/reservoir combo. I built it to make a viable yet affordable water cooling loop after seeing a few vids which said that a 240 rad could do the job. At the start of 2017 and through the year i managed to get good temps on both CPU and GPU. Now that it has ran through nearly half of 2018 i notice that there are lots of air bubbles going through the tubing, along with the reservoir not being "filled to the top" with water. This also resulted in me taking a look at my CPU block, as i thought there are lots of airbubbles in it aswell. When checking the temps now i run around 40C idle on both GPU and CPU. And when under load the GPU is around 60-70C and the CPU at around 80c. This bothers me since a liquid cooling loop should cool better under load. I suspect that it is the airbubbles and the old water that is making my loop show bad temps. 

I was told i should swap water since i haven't done that a single time yet. Which means that the water is older than a year or so. Along with cleaning both GPU and CPU blocks. My question is how i do it all? What is the exact process?

CPU I'm running is: Intel Core i7 5820K Haswell 

and the GPU is: GTX 1080 with EKWB Water Block

[faziten]

4 hours ago, Merun said:

Hello everyone. In 2016 i built myself a custom liquid cooling loop which today cools both my CPU and GPU. The loop contains a 240 rad, soft tubing, EKWB's small EK-XRES 100 pump/reservoir combo. I built it to make a viable yet affordable water cooling loop after seeing a few vids which said that a 240 rad could do the job. At the start of 2017 and through the year i managed to get good temps on both CPU and GPU. Now that it has ran through nearly half of 2018 i notice that there are lots of air bubbles going through the tubing, along with the reservoir not being "filled to the top" with water. This also resulted in me taking a look at my CPU block, as i thought there are lots of airbubbles in it aswell. When checking the temps now i run around 40C idle on both GPU and CPU. And when under load the GPU is around 60-70C and the CPU at around 80c. This bothers me since a liquid cooling loop should cool better under load. I suspect that it is the airbubbles and the old water that is making my loop show bad temps. 

I was told i should swap water since i haven't done that a single time yet. Which means that the water is older than a year or so. Along with cleaning both GPU and CPU blocks. My question is how i do it all? What is the exact process?

CPU I'm running is: Intel Core i7 5820K Haswell 

and the GPU is: GTX 1080 with EKWB Water Block

You should watch Jayz2Cents channel, he has plenty videos out there explaining everything.