Hi people as the title says my car started overheating(4bars ap1) when the other day i was slight uphill with ~90m/h cruising i would say.
Slowed down a little and 3 bars again. After an hour i started it again and went to check it. Same story 4 bars after some hard acceleration i pushed some more and saw 5th bar for 2-3 seconds as i stopped it fell to 4th and after 10seconds 3rd again so i stopped pushing it and drove

 

are you leaking coolant? do you have coolant in your over flow? do a bleed, ensure no air, look for cracked pipes and leak, especially wet stains on hot parts

 

Checked for leaks from first insident didnt found any nor coolant missing the other day from first overheat. Im thinking to do a comp test just so i can sleep at night cause i shit my pants when i saw 5th bar. Then if its ok ill try to flush the rad from these lentil-like inside that seem to have formed in the passages

 

yea i dont know what those are they seem pretty weird, just flush with water until coolant comes clear, than just drain following billmans method

 

Wonder if the little beads are hard deposits or gelatinous ? Hopefully they aren't sitting around the thermostat. For the relatively low cost of a nice aluminum rad I'd probably swap in a new Koyo rad.

To get it perfect you could remove the thermostat, block coolant plug, and then give it a good flush iwith high pressure water from a garden hose. It is a bit of work to remove the thermostat but worth checking if it continues to overheat and the rad flush doesn't solve the issue.