some queries regarding cooling system.
i have installed thermostat valve in February 2015 and now i am noticing that car reduces almost 0.5 liter after approx 1500kms of drive, is the water evaporating due to heat or what ? fans are auto from last year but it never reduced water before installation of thermostat.
water in radiator since 8 years and citric acid cleaning done twice, last done in mid January 2015
-can i use caltex, castrol, zic, fuchs coolant in place of toyota pink coolant ?
2C manual say 'use a good brand of ethylene-glycol base coolant'
two more queries;
-how to ensure that water pump is working fine and not corroded ?
-how to drain water completely to pour in coolant ?