Automatic Transaxle - Service, Removal & Installation [FN4AEL]: Maintenance Mazda 3 BK

OIL COOLER FLUSHING [AUTOMATIC TRANSAXLE]

Note. The contaminated cooler line (oil pipes and hoses) and oil cooler must be flushed completely when ATX is overhauled or replaced.

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1. Remove the two oil cooler line hoses and apply air pressure of 196 kPa {2.0 kgf/cm 2 , 28 psi} from the return hose (pipe) side. CAUTION: Power flushing should be performed very carefully when removing the accumulated debris from the fluid baffle, otherwise the debris cannot be removed or the problem becomes even worse.
2. If there is no air blown out the feed side, flush the oil cooler lines using the power-flushing tool. (See «Power Flushing»(ref-177779-S32024229412005060700000) .) Recommended power-flushing manufacturer
3. If there is ventilation, perform the following steps. Remove the oil pan and inspect the fluid filter element from the front filter. If the element is covered with too much debris or particles and cannot be seen, replace the oil cooler. (See «OIL COOLER REMOVAL/INSTALLATION [AUTOMATIC TRANSAXLE]»(ref-177779-S40029279742005060700000) .) If the element can be seen, flush the oil cooler lines using the power-flushing tool. Performing back and reverse power flushing two times each does not work because debris or particles flow out from the feed pipe side of ATX.