GM-52079-A is used for efficient air-free filling of CAC vehicle coolant systems. The tool can be used for any coolant system that utilizes a Jiffy-tite 5/8” quick‑connect fitting, but it is essential when filling a supercharger or turbocharger cooling system without an overflow/separator so all the air can be purged out of the system. A special dual-flow connector adapter, GM-52079-10 (not included), is used with the GM-52079-A Fill Tool and is plugged into the vehicle coolant system port access connector. The inlet and output hoses on the fill tool are connected to the adapter and the fill tool reservoir is filled with vehicle coolant.
The coolant is circulated using the engine or auxiliary coolant pump. As coolant circulates, it flows into the tool’s clear reservoir and any air bubbles are released from the coolant and exit at the top of the fill tool through a shut-off valve. As coolant enters the system and empties the reservoir, more coolant can be added without introducing air into the system. Shut-off valves on each hose and on the tool reservoir avoid leakage of any residual coolant remaining in the reservoir after service is completed.
The use of this tool eliminates the time spent manually filling, running, and “burping” air out of a system.