Yes. The rule of thumb is to pressure the Charge Air Cooler up to 30 psig and that it should hold air for at least 15 seconds. If there is a pressure loss of 5 psig or more within the 15 seconds, the Charge Air Cooler is leaking out of specification (Leak Down Rate Specification) and it should be replaced immediately. This is only a guideline and it is very important to check the engine manufacturers Leak Down Rate Specification (some common specifications are noted below). Please also reference Dura-Lite’s Tester-Kit™ information page under the Products section of the Website for additional information on the basic procedure.

Leak Down Rate Specifications:

* psig (pound-force per square inch gauge)