Lavramon parang Dialysis ng cooling system... You must remove your Termostat before doing a Lavramon...
Regarding naman sa coolant or no coolant sa akin same lang as long as you use distilled water... All our cars don't use coolant and so far so good... Before sa corona ko I use coolant plus distilled water 50/50 ratio... mga 1 year lang life span ng Radiator ko... BTW I use evercool radiator... but when replaced with distilled lang tumagal radiator ko for 3 years until na benta ko... Pero tama sila coolant lubricate your water pump... kasi nasira water pump ko nung nag distilled lang ako... hehehe... pero after napalitan ok na...