Turbocharger lubricant coolant

A system for an internal combustion engine comprising:

• a lubricant circuit wherein the lubricant circuit has no separate oil cooler;
• a high temperature coolant circuit comprising a first radiator;
• a low temperature coolant circuit comprising a second radiator;
• a turbocharger comprising a housing and one or more bearings, wherein the housing comprises one or more coolant passages for receiving a coolant to cool the turbocharger wherein the second radiator is in fluidic communication with the turbocharger coolant passage such that the coolant for the turbocharger is cooled by the second radiator, and one or more lubricant passages for receiving a lubricant to lubricate the bearings, the lubricant being a lubricant for both the turbocharger bearings and the internal combustion engine wherein the lubricant flows directly from the turbocharger to the internal combustion engine.

A method of cooling an engine comprising:

• compressing air via a turbocharger having a housing and bearings, the housing including coolant passages receiving a coolant to cool the turbocharger and separate lubricant passages coupled with turbocharger bearings with lubricant;
• lubricating both the turbocharger bearings and the engine with the lubricant;
• and
• adjusting a coolant flow through the coolant passages responsive to a lubricant temperature.