Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

how is the turbo cooled? (was: turbo question)

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Old 05-23-2006, 08:32 AM
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turbo question

it the turbo on the WRX oil cooled or air cooled?
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Old 05-23-2006, 10:38 AM
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The factory turbo on all recent Subaru models is water-cooled by engine coolant and both cooled and lubricated by engine oil. There is no forced air that flows past the turbo but there is a series of slots built into the hood scoop splitter plate that serves to allow some of the hot air to vent when the engine is shut off.

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Old 05-23-2006, 10:52 AM
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Yep. Both coolant and oil.
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Old 05-23-2006, 12:50 PM
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