Even now the issue stays but not as bad.Had most parts apart,flushed rad and heater matrix and all hoses.fitted new water pump,temp sender,fan switch,new thermostat.heaters work fine. List goes on,even that wetter stuff.is it possible that ive wired the fan switch back to front that would make the fans kick in late? Its the fan switch from msd.sometimes it kicks in midway or before and other times waits until on high normal temp. Dodgy new temp sender?