GM 24100366
Camshaft

The initial step is to remove the Camshaft cover while rotating the Crankshaft clockwise until the #1 Piston reaches top dead center (TDC) on compression stroke and parallel alignment of "delphi" on the exhaust Camshaft position actuator toward the Cylinder Head to cam cover mating surface. The Camshaft holding tool j 44221 serves as a rear Camshaft support for the next step of extracting the intake and exhaust Camshaft sprocket bolts which get discarded. The Camshaft sprocket holding tool j 44222 should be installed on the Cylinder Head where the horizontal bolts function to sustain chain tension across the Camshaft sprockets. Pass the Camshaft sprockets with Timing Chain towards the j 44222 installation method. Loosen and tighten the Camshaft cap bolts alternately while releasing valve spring tension and arrange the Camshaft caps on a rack for correct placements. After removing Camshaft caps with j 44221 you should extract camshafts out of the Cylinder Head and proceed with cleaning along with inspections. Clean engine oil should be used to coat Camshaft journals thrust face and lobes before placing j 44221 onto Camshaft flats while the #1 Piston remains at tdc. Install the intake to exhaust camshafts in their original positions with caution by aligning the markings on the Camshaft caps appropriately. Install the Camshaft caps but begin fixing their bolts with an even distribution to compress the valve springs before final torque application at 12 nm (106 inch lbs.). A 25 mm (1 inch) wrench should rotate the hex-shaped camshafts towards each other to check that the alignment pins connect properly. Move the Timing Chain equipped sprockets from j 44222 to camshafts before removing j 44222. Screw the new intake Camshaft sprocket bolt along with the new exhaust Camshaft actuator bolt into place before tightening the intake bolt to 20 nm (15 ft. Lbs.) and following the angle meter (J 45059) procedure to perform additional 100-degree rotation. Benchmark the exhaust Camshaft actuator bolt at 25 nm (18 ft. Lbs.) before proceeding with the angle meter (J 45059) method that requires a 135-degree rotation. Place the cmp sensor followed by reinstallation of the Camshaft cover after removing j 44221 from camshafts.

Start the Camshaft replacement by taking off the Camshaft cover along with the Camshaft position (CMP) sensor. Rotate the Crankshaft clockwise until the #1 Piston is at top dead center (TDC) on the compression stroke. When using the j 44221 Camshaft holding tool at the Camshaft back you must discard the intake and exhaust Camshaft sprocket bolts while tightening the bolts on the j 44222 Camshaft sprocket holding tool at the Cylinder Head front section and properly adjusting the horizontal bolt screw in the exhaust Camshaft phaser actuator sprocket to uphold Timing Chain tension. Use the j 44222 to pull the Camshaft Timing Chain as well as sprockets out of the camshafts. First loosen the Camshaft cap bolts to remove all valve spring pressure before extracting the Camshaft caps and the j 44221. The Cylinder Head needs to have both camshafts removed from it. For installation, coat the Camshaft journals, thrust face, and lobes with clean engine oil, then install the j 44221 with the Camshaft flats up and the #1 Piston at tdc. Markings on Camshaft caps guide the correct positioning of camshafts for intake and exhaust. Tighten the Camshaft caps evenly until valve springs become compressed before applying 12 nm (106 lb in) of final torque. When positioning camshafts use a 25 mm wrench on the hex to align the sprockets while also ensuring the pins stay engaged. Remove the j 44222 after moving its sprockets with Timing Chain components to the camshafts. Tighten the new intake Camshaft sprocket bolt to 20 nm (15 lb ft) followed by an additional 100 degrees while using the j 45059 angle meter. Similarly, tighten the new exhaust Camshaft actuator bolt to 25 nm (18 lb ft) with 135 degrees additional torque while using the j 45059. Complete installation by removing the j 44221 then placing the cmp sensor and reattaching the Camshaft cover.

In order to change the Camshaft, one needs to start by removing the Camshaft cover, then the exhaust Camshaft position (CMP) sensor and the intake Camshaft position (CMP) sensor. Rotate the Crankshaft clockwise until the #1 piston is at top dead center (TDC) on the compression stroke, ensuring the word delphi on the exhaust Camshaft position actuator is parallel with the Cylinder Head to cam cover mating surface. Use Camshaft holding tool (J 44221) at the back of the Camshaft and then remove the intake as well as the exhaust Camshaft sprocket bolts disposing of them. Then, put the Camshaft sprocket holding tool (J 44222) on the Cylinder Head, adjusting the horizontal bolts to the Camshaft sprockets and ensure chain tension. Carefully slide the sprockets with the Timing Chain feom the camshafts as well as the j 44222. Otherwise, loosen the Camshaft cap bolts alternately so that all valve spring pressure is relieved and letting the Camshaft caps rest in a rack correctly for re-assembling. Remove the Camshaft caps and j 44221 and get the camshafts out of the Cylinder Head and clean and inspect them. For installation, coat the Camshaft journals, thrust face, and lobes with clean engine oil, then install the j 44221 with the Camshaft flats up and the #1 piston at tdc. Reinstall the intake and exhaust camshafts into their original positions so that the markings on the Camshaft caps are not misplaced. Mount and tighten the camshafts caps one by one in an even manner so as to compress the valve springs prior to final torque, which should lie at 12nm (106 inch lbs.). For the purpose of aligning the sprockets, one could make use of a 25mm (1 inch) wrench on the hex of the camshafts. Gently move the sprockets with the Timing Chain in relation to the camshafts then remove j 44222 from the Cylinder Head. Install the new intake Camshaft sprocket bolt and the new exhaust Camshaft actuator bolt and tighten the intake to 20 nm (15 ft. Lbs.) and rotate it 100 degrees more using the angle meter (J 45059). Use angle meter (J 45059) to loosen the exhaust Camshaft actuator bolt, but do not fully remove it from its base. Tighten the bolt by 25 nm (18 ft. Lbs.) and after that, turn it 135 ° in addition. Lastly, take out the j 44221 on the camshafts, reposition the intake Camshaft position (CMP) sensor, the exhaust Camshaft position (CMP) sensor, and the Camshaft cover.

Coat the camshaft journals, thrust face, and lobes with clean engine oil.

Remove the J 44221, install the CMP sensor, and reinstall the camshaft cover.

Use a 25 mm (1 in) wrench on the hex of the camshafts to aid in aligning the sprockets, ensuring the alignment pins are properly engaged.

Install the Camshaft Sprocket Holding Tool (J 44222) onto the cylinder head and adjust the horizontal bolts into the camshaft sprockets to maintain chain tension.