@jaslionIt is mounted in the front, so the top of the rad is at the same height as the pump. I know, not ideal, but it has been there always. It is 3 years old now, I have added distilled water like 6 months ago, to top it off, and now i noticed, through the little window, that the liquid has small particles in it. These were not there before I filled it up.
@StahlmannI have tried another 3 times, once with x pattern, once with 5 spots, 1 middle, 4 in the corners and once with a graphite pad and a little paste to hold it in place. Same result, sometimes 8-10 degrees warmer, but always idle over 55 degrees. I
I was wondering about the pressure too, when i screw them in by hand it feels like i can tighten them really really hard. They can't bottom out, since they go through the backplate (that x shaped plastic thing) and they are all differently far in there, some look out and some are still not through... maybe that's worth a try? Like to make sure that they all go through similar amounts?