Engine Cooling System: Overview Acura RDX I facelift

Scheme 1

Scheme 2

1. Wait until the engine is cool, then carefully remove the radiator cap (A). Wet the radiator cap seal with engine coolant, then install it on a commercially available pressure tester (B).
2. Apply a pressure of 93-123 kPa (0.95-1.25 kgf/cm 2 , 13.5-17.8 psi).
3. Check for a drop in pressure.
4. If the pressure drops, replace the radiator cap.

Scheme 3

1. Wait until the engine is cool, then carefully remove the radiator cap, and fill the radiator with engine coolant to the top of the filler neck.
2. Attach a commercially available pressure tester (A) to the radiator, and apply a pressure of 93-123 kPa (0.95-1.25 kgf/cm 2 , 13.5-17.8 psi).
3. Inspect for engine coolant leaks, and a drop in pressure.
4. Remove the tester, then reinstall the radiator cap.

Scheme 4

1. Disconnect the 2P connectors from the radiator fan motor (A) and the A/C condenser fan motor (B).
2. Test the motor by connecting battery power to terminal No. 2 and ground to terminal No. 1.
3. If either the motor fails to run or does not run smoothly, replace it (see «FAN, FAN MOTOR, AND SHROUD REMOVAL AND INSTALLATION»(ref-513839-S12856379862012111600000) ).

See also:
• MAINTENANCE MINDER™
• ATF COOLER HOSE REPLACEMENT