December 13,2021 1987 D21 nissan sev6 over heating not thermostat fail air bubble in koolant system 

what a relief , was overheating after swapping out thermostat 5 months ago.. no koolant leaks ,, not water pump.. air bubble in koolant system,,, lots of better koolant bleed youtubes so my issue solved by adding koolant n parking on an incline to let air bubbles rise ,, to top of radiator ,, i filled it maybe 6 times to get all the air out