Tech Tip: Subaru Radiator Cap Cleaning

Tech Tip: Subaru Radiator Cap Cleaning

Whenever servicing the coolant/radiator, it's imperative that the filler neck and cap are clean of all contaminants and debris. If foreign material is left in the filler neck sealing area, it will become embedded in the rubber seal and prevent the cap from sealing properly. Before making the determination that the radiator cap is faulty, perform the following repair procedure.

Whenever servicing the coolant/radiator, it’s imperative that the filler neck and cap are clean of all contaminants and debris.

If foreign material is left in the filler neck sealing area, it will become embedded in the rubber seal and prevent the cap from sealing properly. Before making the determination that the radiator cap is faulty, perform the following repair procedure.

Repair Procedure:
Caution: The engine cooling system is under pressure and may be extremely hot. To prevent personal injury or vehicle damage, be sure to take appropriate precautions while performing this procedure.

1. Wash and clean the rubber seal surface(s) using clean water and a soft bristle brush.

2. Carefully open the negative pressure valve. Using clean water and a soft bristle brush, wash and clean the mating surface between the valve and the rubber seal.

Note: Clean thoroughly; failure to do so will prevent the cap from holding pressure.

3. After cleaning, check the valve-opening pressure of the cap using a cap tester according to the applicable service manual.

4. Clean the filler neck sealing surface of any and all contaminants.

Note: If the valve opening pressure stays within the predetermined specification, the cap is reusable. Only replace caps that failed the pressure test.

Special Note: If the vehicle has any record of overheating, the cap may not be reusable even after cleaning due to the deterioration of the sealing materials.

Courtesy of ALLDATA.

For information on products offered by ALLDATA, visit www.alldata.com.

You May Also Like

Gravity Releases Universal EV Charging ‘Trees’

The ‘trees’ require no utility upgrades and are capable of providing 200 miles of range in either 13 minutes (200kW) or 5 minutes (500kW).

Gravity has released a new universal on-street mounting and cable system, dubbed “DEAP Trees,” for its 200kW and 500kW Distributed Energy Access Points (DEAPs). Gravity said it is striving to develop a network of on-street DEAP charging more expansive than Tesla’s current Supercharger network.

Gravity’s engineers, in collaboration with design firm Rangr Studio, took on the challenge of solving frictions in curbside charging today. Each Gravity universal DEAP Tree has a hinged swing arm holding a cable that pivots down when charging begins, allowing it to reach the port of every make and model. When charging is completed, the arm raises automatically and the EV connector latches back onto the pole and out of sight.

Randy Breaux, Group President, GPC North America, Talks to AMN Drivetime

At NAPA, “Breaux Knows” business relationships, ABCs to avoid, and serving the automotive professional.

Is Training For The Sake Of Training Always Worth It?

Technology changes every day. Are you keeping your techs in top shape?

Understanding Customer Clunking And Clicking Complaints

Can Your Techs Diagnose and Repair Modern Axle Complaints?

Comprehensive Guide to Serpentine Belt and Drive System Maintenance

Properly maintaining the entire drive system prevents premature belt wear and system failure, ensuring customer satisfaction and vehicle reliability.

Other Posts

How Modern Car Sensors Optimize Performance and Emissions

Learn how Standard ensures accuracy, speed, and durability in their sensors to maximize engine performance and efficiency.

Chassis Parts and Alignment Angles

Knowing why the adjustment is required is critical to performing the total alignment.

Top 10 Wheel Bearing Torque Tips

A torque wrench is an essential tool when it comes to installing wheel bearings.

Blink CEO to Present at Energy, Power & Renewables Conference

The event is scheduled for June 17 at 1:10 p.m. ET.