The EGR cooler is a common source of problems on the Liberty CRD. When it fails it can cause an EGR leak, coolant leak, or leak coolant into the EGR and cause all sorts of problems.
If you have removed the EGR system with an elbow kit or via tuning, it is best to take the EGR cooler off completely. This kit includes the components you need to re-route the coolant system when you remove the cooler.
The two items in this kit are a straight barb fitting that replaces the Y fitting at the thermostat. Secondly, it includes a plug with new seal for the cylinder head that replaces the coolant barb connecting to the EGR cooler hose.