GM 95522522
Timing Belt

The necessary tools for Timing Belt service and repair include j 42069 Timing Belt alignment kit (J 42069) and j 42098 crank hub torx socket (J 42098) together with j 42069-40 adjustment wrench (J 42069-40). The j 42069-20 should be applied to camshaft gears 3 and 4 while checking for mark alignment; make adjustments if necessary. The same process should be used to align camshaft gears 1 and 2. Adjust belt alignment by first loosening the idler pulley of the Timing Belt then applying the j 42069-40 to achieve necessary motion direction of the eccentric either clockwise or counterclockwise before securing the idler pulley bolt at 40 nm (30 ft. Lbs.) when maintaining contact with the eccentric. Twist the Crankshaft twice using j 42098 until it reaches 60 degrees before top dead center (BTDC) before installing the j 42069-10 to the Crankshaft drive gear. The j 42069-10 lever needs to engage with the water pump pulley flange to provide stable fixing. Additional check and realignment of camshaft gear marks against j 42069-20 must be performed when needed. To finish the Timing Belt Tensioner set the eccentric locking nut to 20 nm torque while setting the reference mark at 2-4 mm above the flange mark by turning the nut counterclockwise to the full stop and back. After completing engine reassembly all bolts must be torqued to specification following the removal of checking tools and a final inspection of alignment should be done.

The necessary toolkit for Timing Belt replacement includes Timing Belt alignment kit (J 42069), crank hub torx(R) socket (J 42098), as well as supporting tools j 42069-10, j 42069-1, j 42069-2, j 42069-30, and j 42069-40. Begin by viewing cold start readings on the tool while checking for belt cracking and doing a replacement if needed. Starting the procedure by removing the intake air resonator, intake plenum and Timing Belt cover before extracting the crankshaft balancer bolts together with the balancer itself. First install the j 42069-10 to the crankshaft sprocket when the crankshaft has a clockwise rotation at 60 degrees before top dead center (BTDC). Turn the crankshaft with j 42098 until the lever of j 42069-10 contacts the water pump pulley flange to avoid positioning the crankshaft 180 degrees off tdc. First secure the lever while installing j 42069-1 and j 42069-2 on the camshaft gears after necessary adjustments. First loosen the tensioner of the Timing Belt and idler pulleys before removing the Timing Belt. Depending on the installation of your new or used Timing Belt you need to verify that the directional arrows align with the crankshaft movement. Begin Timing Belt installation at the crankshaft sprocket while using j 42069-30 tool to grasp the belt components. Place the Timing Belt inside the camshaft gear path and Timing Belt Tensioner component while maintaining correct alignment between all elements. Use j 42069-40 to check the Timing Belt deflection before applying corrections through adjustments. The initial Timing Belt tension should be set before checking alignment marks while removing the locking tools from the system. Use tool j 42098 to rotate the engine while inspecting alignment after which you need to make required changes. Finish the reassembly process by installing the crankshaft balancer then the Timing Belt cover together with the intake plenum and intake air resonator and verify no tools are left inside the engine.

The process to replace a Timing Belt needs the use of particular tools including Timing Belt alignment kit (J 42069), crank hub torx© socket (J 42098) and additional components j 42069-10, j 42069-1, j 42069-2, j 42069-30, and j 42069-40. Any observed cracks or wear on the Timing Belt will lead to it being considered unfit for reuse. Start the replacement by taking off both the Timing Belt cover along with the crankshaft balancer. You should rotate the crankshaft clockwise using the crank hub torx© socket (J 42098) until the #1 cylinder reaches top dead center during compression stroke. The goal is to see that the reference marks on both camshaft gears line up with the notches found on both the rear Timing Belt cover and the crankshaft sprocket. The crankshaft needs to rotate counterclockwise until the crankshaft reaches 60 degrees before top dead center (BTDC) while maintaining the moveable lever toward its forward position. The Timing Belt alignment kit (J 42069-10) should be mounted onto the crankshaft sprocket while rotating the crankshaft clockwise until the tool lever touches the water pump pulley flange. This action locks the moveable lever into place. You should use the tools j 42069-1 and j 42069-2 to attach them to the camshaft gears but only after loosening the upper idler pulley when necessary for correct fit. Begin by removing the lower idler pulley combined with its adjacent spacer while also undoing the Timing Belt Tensioner nut and the upper idler pulley bolt. Experienced personnel must maintain separate bodily action on the camshaft and crankshaft to prevent their inter-sector contact. For new or used Timing Belt installation, both rotational directions must align with crankshaft motion and the belt guide marks need to be utilized for proper fit. To prevent belt jumping the sprocket teeth install the Timing Belt alignment kit (J 42069-30) while guiding the belt to enter the Timing Belt Tensioner then the camshaft gears and re-install the lower idler pulley with its spacer. Use crank hub torx© socket (J 42098) to turn the crankshaft into top dead center while applying 40 nm of torque (30 lb ft) to the lower idler pulley bolt. Sustain tension on the Timing Belt at the upper idler pulley until initial tension reaches its specified level while checking the alignment marks. After removing tools j 42069-30, j 42069-1 and j 42069-2 the mechanic rotates the crankshaft ahead to 60 degrees btdc prior to reinstallation of the Timing Belt alignment kit (J 42069-10). Secure the moveable lever while checking the reference marks alignment on both camshaft gears. The necessary adjustment steps should be followed but when no adjustment is needed final Timing Belt tension should be set before tightening the upper idler pulley bolt to 40 nm (30 lb ft). The maintenance process concludes by uninstalling tools j 42069-10 and j 42069-20 followed by reinstallation of the crankshaft balancer and Timing Belt cover.

Service and repair of the Timing Belt requires a combination of Timing Belt alignment kit (J42069) and its parts (J42069-10, J42069-20, J42069-40) with crank hub torx® socket (J42098). After placing j42069-20 onto camshaft gears 1 and 2 make sure their marks match exactly before moving on; otherwise adjust the Timing Belt. The j42069-40 tool lets you align to the left of j42069-20 by turning the eccentric counterclockwise until it is correctly positioned then tightening the bolt to 40 nm (30 ft. Lbs.). Use j42098 and rotate crankshaft clockwise two revolutions until reaching 60 degrees before top dead center (BTDC). Then remove j42069-10 and j42069-20 from installation. Place the j42069-10 on the crankshaft sprocket before turning the crankshaft clockwise until the movable lever of the j42069-10 reaches the water pump pulley flange. Check that the crankshaft is not located 180 degrees beyond top dead center and verify that camshaft gear reference marks match the rear Timing Belt cover notches. Perform a reappraisal of the alignment steps when required. To position j42069-20 to the right side perform the same procedure while rotating the eccentric clockwise. Begin adjusting the Timing Belt Tensioner by first rotating the eccentric locking nut counterclockwise until reaching the established position for new or used belts and tighten it to 20 nm (15 ft. Lbs.). Proceed to torque the upper idler pulley bolt as you maintain the eccentric using tool j42069-40. Conduct the last check by rotating the crankshaft clockwise twice through 60 degrees btdc before putting back the j42069-10 tool and checking camshaft gear alignment using the j42069-20. The timing operation will continue when the gear marks consistently match. Move on to reassemble the parts while installing both the crankshaft balancer and Timing Belt cover.

Inspect alignment marks, remove the locking tools, rotate the engine with the J 42098, install the J 42069-10, and secure the lever to the water pump pulley flange.

Wedge the J42069-30 between the oil pump housing and timing belt to prevent jumping.