sensya na mga sir, getting frustrated na din sa unit. tried searching the forum pero walang mahanap na definite answer.

Unit: Fortuner 3.0
Problem : Excessive white smoke at startup, while running when the engine is still cold. Happens especially in the morning and when the engine has cooled off after an hour or so.

Ano po kaya problema mga sir? Kapag uminit na makina, hindi na sya mausok. My dealer did decarbonizing and some gasket change pero ganun pa din. Advised me to have some o-rings replaced and nozzle something. My mum's driver told me na baka daw valve seal ang problema.

Any experiences (and possible diagnostics and solution/s) mga sir?

BIG BIG thanks in advance!