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Service Bulletins

Service Bulletins

Repeated Failures of New Water Pumps

Multiple failures of new or rebuilt water pumps on the same vehicle when the failure appears to be bearing or seal related should perform the following:
Closely inspect and replace the fan clutch if visible movement of the shaft in a vertical or horizontal direction is noted when checked by physically applying pressure to the fan blade in a front to back direction with the vehicle turned off and the battery disconnected. When the fan blade freely rotates when physically turned by hand while the vehicle is turned off with the battery disconnected. When the fan clutch shows signs of fluid leakage at the front thermal pin area located in the center front of the fan clutch or at the rear shaft and bearing area.

Repeated Failures of New Fan Clutches
Multiple failures of new fan clutches on the same vehicle when the failure appears to be bearing, seal or shaft separation related should perform the following:
Closely inspect and replace the water pump if visible movement of the shaft in a vertical or horizontal direction is noted when checked by physically applying pressure to the fan blade in a front to back direction with the vehicle turned off and the battery disconnected.

Transmission Oil and Filter Change
When changing your transmission fluid and filter note the color of the fluid. If the fluid is brownish in color and smells like burnt toast the vehicle could be experiencing transmission overheating. Every 20 degrees Fahrenheit decrease in fluid temperature can double the life of the fluid and transmission components. Protect your vehicles transmission - install a Hayden Transmission Oil Cooler. The addition of a Hayden cooler can lower your transmissions temperature by up to 60 degrees Fahrenheit. Three times the amount required to double the life of your transmission.

See the Fan Clutch Operation & Troubleshooting guide for more information

DID YOU KNOW?
When changing your water pump it is a good idea to change the fan clutch at the same time. Both share a common shaft and have the same life expectancy.