Metering Oil Pump; Outline - Mazda RX-7 1989 Service Highlights

METERING OIL PUMP
OUTLINE
An electronically controlled metering oil pump is used instead of the previously used mechan1cal metering
oil pump for reduced oil consumption. This new metering oil pump is controlled by the eng1ne control unit. ...
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The ECU bases it calculation of engine oil needs on the input from various sensors.
It then sends a pulse signal to control the oil discharge amount according to engine speed, eng1ne coolant
temperature and intake air amount (load condition).
The same metering oil pump is used for turbo and non-turbo engines, but the oil nozzle plumbing 1s different
TURBO
HOUSING OIL NOZZLE
MANIFOLD OIL NOZZLE
NON-TURBO
0-4
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I
NON-TURBO
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