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Home >> Chevrolet >> 2000 >> Lumina >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Servicing - A/T >> Lubrication >> Oil Cooler Flow Test

Oil Cooler Flow Test

  1. Disconnect both hoses from the oil cooler pipes. Connect the oil cooler feed pipe to the transaxle and the return pipe to the discharge hose (5). See Figure . Clip the discharge hose (5) onto the empty oil drain container.
  2. Confirm the transaxle is filled with ATF. See CHECKING FLUID LEVEL & CONDITION  .
  3. Start the engine with the transaxle in Park range and run for 30 seconds. A minimum of 2 qts. (1.9L) must be discharged during this 30-second run time. If fluid flow is greater than 2 qts. (1.9L) in 30 seconds, go to step  4 . If fluid flow is less than 2 qts. (1.9L) in 30 seconds, perform the following diagnosis:
    • Disconnect the oil cooler feed line at the radiator.
    • Connect the discharge hose to the cooler feed line. Clip the discharge hose onto the empty oil drain container.
    • Start the engine with the transaxle in Park and run for 30 seconds. A minimum of 2 qts. (1.9L) must discharge during the 30-second run time. Do the following according to flow rate. For insufficient feed flow, inspect the transaxle. For sufficient feed flow, inspect the cooler return pipe and the cooler.
  4. Remove the discharge hose, reconnect the cooler feed and return pipes to the transaxle and refill the unit to the proper fluid level. See CHECKING FLUID LEVEL & CONDITION  .