Under the Hood: DodgeSRT-4
The extra heat of turbocharged combustion makes for some hot pistons. That heat is carried away in part by a spray of oil from an oil squirter at the bottom of each cylinder. The high volume of oil flowing from these squirters can rob valuable oil from the rest of the engine, so each sprayer has a small ball valve to shut off oil flow at idle and low rpm when the oil pump can't flow enough to supply everything.
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