Cummins N14 – Testing – Oil Cooler Core

Install and clamp a short section of hose over either the inlet or outlet transfer tube of the oil cooler. Install a plug
into the opposite end of the section of hose and install the clamp.

Attach a regulated air pressure hose to the other water transfer tube and apply 81 kPa [60 psi] air pressure.

Submerge the oil cooler in a tank of water heated to 82°C [180°F] for 3 to 5 minutes and inspect for leaks.
NOTE: If leaks are found, replace the oil cooler core.

Remove the oil cooler core from the water tank.
Remove the hoses and clamps from the oil cooler.
Remove all water from the oil side of the cooler. Dry the oil cooler with compressed air.