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Oil Cooler Flushing

WARNING:
  • Do not perform the servicing while the ATF is hot. Otherwise, it could cause severe burns or serious injury.
  • Always wear protective eye wear when using the air compressor. If the air compressor is used, any particles of dirt or soiling could spatter and get into the eyes.
NOTE:
  • If the transaxle is replaced, flush and inspect the oil cooler.
  • When replacing the transaxle, inspect the oil cooler together with flushing it using the following procedure, and with the oil hose removed.
  1. Remove the aerodynamic under cover. (See AERODYNAMIC UNDER COVER REMOVAL/INSTALLATION .)
  2. Disconnect the oil hose from the transaxle. (See OIL COOLER REMOVAL/INSTALLATION .)
  3. Set a clean oil pan up to the oil hose inlet.
    Fig 1: Setting Clean Oil Pan Up To Oil Hose Inlet
    G08152167Courtesy of MAZDA MOTORS CORP.
  4. Blow 491-882 kPa {5.01-8.99 kgf/cm2 , 71.3-127.0 psi} of compressed air from the oil hose outlet to drain remaining oil.
    Fig 2: Blowing Compressed Air From Oil Hose Outlet
    G08152168Courtesy of MAZDA MOTORS CORP.
  5. Add new ATF from the oil hose outlet and blow 491-882 kPa {5.01-8.99 kgf/cm2 , 71.3-127.0 psi} of compressed air to flush (perform a few times).
  6. Verify that none of the following foreign material is mixed in with the drained the ATF:
    • Large metal fragments of 0.5 mm {0.02 in} or more  that cannot pass through the oil strainer.
    • Fibrous clutch facing
  7. Repeat Step  5 and flush the inside of the oil cooler.
    • If foreign material such as metal fragments or clutch facing remains even after the oil cooler is flushed repeatedly, replace the oil cooler. (See OIL COOLER REMOVAL/INSTALLATION .)
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