yes you have noticed right, most cars older than 4-5 years start using water in the radiator here in warmer climate areas, one is because they dont have proper knowledge about coolants or they simple dont want to spend on something that they think does the same job as water...! anyways i will be flushing the cooling system and using coolant..any specific brands? is antifreeze the same as coolant? doesnt sound so?! how and where to get boost checked? and also set timing and pump timing? 4d56 turbo boost starts at what rpm on a stock motor? have u changed/upgraded your turbo?
regards
a worried-
asad