The first step to replace the Fan Blade includes removal of the upper
Fan Shroud. Inspection procedures for engine types 4.3l, 4.8l, 5.3l, 6.0l, 8.1l require using the j41240 (J 41240) with the
Fan Clutch and the j41240-5a (J 41240-5A) for 6.6l models. After removing the upper Fan Shroud start by laying the Fan Blade down on a workbench with its face visible. You should take out the Fan Clutch bolts from the rear of the Fan Blade for 4.3l, 4.8l, 5.3l or 6.0l engine models and the 6.6l or 8.1l engines when needed. Make a separation between the Fan Blade and Fan Clutch. The cooling fan assembly needs immediate replacement with a new one to prevent personal injury and property damage and avoid any installation attempt on damaged components. The installation of the Fan Clutch onto the Fan Blade should proceed for both 6.6l and 8.1l engines followed by securing the Fan Clutch bolts. Installation of the Fan Clutch onto the Fan Blade becomes necessary for the 4.3l, 4.8l, 5.3l, or 6.0l engine models before tightening the Fan Clutch bolts to 23 nm (17 ft. Lbs.). Fan Blade installation precedes attachment of the j 41240-5a (J 41240-5A) Fan Clutch while the j 41240 (J 41240) needs installation for 4.3l, 4.8l, 5.3l, and 6.0l or 8.1l engines by tightening the Fan Clutch nut to 56 nm (41 ft. Lbs.). Put back the upper Fan Shroud as the last step.