Engine system having turbocharger

An engine system having a turbocharger, comprising:

• a cylinder head at which an intake manifold and an exhaust manifold are placed;
• the turbocharger that is connected to the exhaust manifold and compresses intake air by a first exhaust gas that is exhausted from the exhaust manifold;
• an intake line that is formed between the turbocharger and the intake manifold through the cylinder head to deliver a compressed air that is compressed by the turbocharger;
• an intercooler that is placed between the intake line and the intake manifold to cool the compressed air;
• an Exhaust Gas Recirculation (EGR) line that recirculates a second exhaust gas that is exhausted from the exhaust manifold to the intake manifold;
• and
• an EGR cooler that is placed between the EGR line and the intake manifold to cool an EGR gas,
• wherein a low temperature coolant passing through the cylinder head cools the compressed air,
• wherein the intercooler and the EGR cooler are water cooled types that cool the compressed air by the low temperature coolant circulating through a low temperature coolant line that is different from an engine coolant line that cools the cylinder head, and
• wherein the low temperature coolant line passes through the intercooler and the EGR cooler, then passes through the cylinder head to cool the compressed air passing through the cylinder head via the intake line, and circulates through a low temperature pump and a low temperature radiator mounted on the low temperature coolant line.