Cooling System - Cooling System Conditioner

SOURCE: Subaru Tech Tips

TITLE: Cooling System Conditioner

APPLIES TO: All models

SERVICE TIP:

This conditioner reinforces the efficiency of the cooling system and includes anti-corrosive properties. When used as directed, the Cooling System Conditioner remains suspended in the radiator until the engine is started and the thermostat fully opens. Once this product begins to circulate throughout the cooling system, the conditioner is attracted to the suspect area in the vehicle's cooling system. The heat generated by the engine acts as an activation agent and hardens the cooling system conditioner to help seal the suspect area.

It is important to remember that this product is not to be used in place of proper diagnostic processes. The proper diagnostic process is to thoroughly inspect the cooling system before the conditioner is added to the vehicle. For example, this product does not remedy concerns where coolant is found in the combustion chamber, loose heater hose clamps, or cracked coolant reservoir tanks. Be sure to properly diagnose the cooling system before deciding to use this product.

Since June of 2003, the Cooling System Conditioner has been added in production on all 2.5L Phase II engines (this also includes the 2.5L Phase II turbo engine). In addition to the 2.5L Phase II engine, Fuji Heavy Industries Ltd. and Subaru of America, Inc. have determined that this product is safe for use in all Subaru vehicles. Therefore starting with the introduction of the Phase II 2.5L engine (1999 model year Forester and Impreza), Subaru of America, Inc. has updated all of the Service Manuals to reflect the adding of the conditioner whenever the antifreeze is drained and replaced.