Question 1

How to replace the timing chain and sprockets on Chevrolet Colorado?

Accepted Answer

Start the repair by getting together these essential tools: a set of tools needed includes camshaft holding tool (J 44221) alongside angle meter (J 45059). Camshaft holding tool (J 44221) and angle meter (J 45059). Begin by removing the #1 cylinder spark plug, camshaft cover, camshaft position (CMP) sensor, and engine front cover. 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. Position the camshaft holding tool (J 44221) behind the camshafts then release Timing Chain tension through the tensioner shoe's inward motion while placing a tee into the tensioner for maintenance. Remove and discard the exhaust camshaft position actuator bolt then discard the actuator followed by the intake camshaft sprocket bolt and the intake camshaft sprocket. Take off the Timing Chain and Crankshaft sprocket. For installation, ensure the #1 piston is at tdc with the Crankshaft Timing Chain sprocket pin straight up. The first installation step involves fitting the Crankshaft sprocket followed by the intake camshaft sprocket. At this point align the dark link portion of the Timing Chain with the intake camshaft sprocket timing mark. Slide the Timing Chain through the cylinder head opening after positioning it on the Crankshaft sprocket and align dark link with timing mark. After installing the intake camshaft onto the sprocket, users should add the new intake camshaft sprocket bolt and apply torque of 20 n.m (15 lb ft) while using the angle meter (J 45059) to achieve another 100 degrees of tightening. Perform the following steps before installing the exhaust camshaft actuator: advance the camshaft actuator to its fullest position and line up the dark link with the timing mark on the actuator sprocket. Install the exhaust camshaft actuator to the exhaust shaft using a 25 mm (1 in) wrench on the camshaft hex for alignment purposes. Secure the component with a new bolt and tighten to 25 n.m (18 lb ft) while also adding 135 degrees using the angle meter (J 45059). Use a new bolt to fix the Timing Chain Tensioner confirmation tee. After removing the camshaft holding tool (J 44221) place the dark links directly on the sprocket marks. Finally, reinstall the engine front cover, camshaft position (CMP) sensor, camshaft cover, and #1 cylinder spark plug.

Question 2

How to replace the camshaft timing chain, sprocket, and tensioner on Chevrolet Malibu?

Accepted Answer

The repair process for changing a Camshaft Timing Chain starts with the removal of the number 1 cylinder's Spark Plug followed by turning the Crankshaft to a clockwise direction until the number 1 Piston gets to top dead center (TDC) on the exhaust stroke. Start by taking off both the Camshaft cover and the engine front cover. First detach upper Timing Chain guide bolts and guide while also extracting the tensioner unit to release tension from the chain. Use a 24 mm wrench to hold the exhaust Camshaft during the procedure after you remove the Timing Chain Tensioner. The exhaust Camshaft actuator bolt needs to be discarded before you extract the actuator from the Camshaft and Timing Chain. After you extract the Timing Chain Tensioner guide bolt with its guide remove the fixed Timing Chain guide access plug together with its guide bolts and guide. When working on the intake Camshaft actuator maintain the steps exactly like the exhaust Camshaft actuator but use the top of the cylinder head to extract the Timing Chain then remove the Timing Chain Crankshaft sprocket. For a balance shaft Timing Chain or sprocket replacement the technician must unfasten the balance shaft drive chain tensioner bolts while also removing the tensioner and the adjustable and small balance shaft drive chain guides. Proper installation of the balance shaft drive sprocket requires correct balance shaft timing to prevent engine vibration. The balance shaft drive chain undergoes installation with timed colored links facing the timing marks on both sprockets before installing the upper and smaller chain guides followed by the adjustable guide and tightening all components to torque specs. Reset the Timing Chain Tensioner through plunger compression followed by securing it with a paper clip. Mount the balance shaft drive chain tensioner correctly while double-checking that the intake and exhaust Camshaft notches maintain proper alignment. Before assembly place the Timing Chain drive sprocket so its timing mark faces the proper orientation then position the intake Camshaft actuator with its timing mark matching the colored link. Guide the Timing Chain along the Crankshaft sprocket pathway while keeping both colored links and timing marks in sequence. Fit the fixed Timing Chain guide onto the assembly while installing its bolts next add the upper Timing Chain guide and torque it to the indicated value. Before installing the Timing Chain Tensioner assembly technician needs to reset the Timing Chain Tensioner and inspect the seal for damage and ensure the threaded hole remains clean. Start by releasing the Timing Chain Tensioner then apply torque to the intake and exhaust Camshaft actuator bolts using the angle meter to reach a specified torque measure along with an additional angular measurement. Installation of the Timing Chain oiling nozzle is followed by applying sealant to the Timing Chain guide bolt access hole plug which should be installed and tightened to specification before reinstalling both engine front and Camshaft covers along with the number 1 cylinder Spark Plug.

Question 3

How to replace the timing chain and sprockets on Chevrolet SSR?

Accepted Answer

To replace the Timing Chain as well as the sprockets, they must first be healed of the Oil Pump and have the Crankshaft rotated until the timing marks found at the Crankshaft and the camshaft sprockets are aligned whereas they must not rotate the Crankshaft assembly after the Timing Chain has been removed to prevent further damage to the piston assemblies or valves. Then, take away the camshaft sprocket bolts, camshaft sprocket and Timing Chain. Remove the Crankshaft puller using the timberland j 8433 two jaw puller (J 8433), j 41816-2 Crankshaft end protector (J 41816-2), and j 41558 Crankshaft sprocket remover (J 41558), and if necessary remove the Crankshaft sprocket key. Check the Timing Chain and the sprockets. You need to unhook them, clean, and install them again properly. For installation, insert the key into the Crankshaft keyway and drive into place until the ends are seated. Mount the Crankshaft sprocket on the front of the Crankshaft, with crayksaft key matched to the keyway in the sprocket, and using the j 41665 Crankshaft balancer and sprocket installer, j 41665, to seat the sprocket fully against the Crankshaft flange. Swivel the crank shaft sprocket so that the alignment mark is at 12 o clock position ensuring that when the sprocket locating pin of the camshaft sprocket alligns with the camshaft sprocket pin alignment hole this will also ensure that the teeth of the sprocket's and Timing Chain hook up correctly. Line up the camshaft and the Crankshaft sprocket marks, then install the camshaft sprocket and the Timing Chain and line it up if needed with the timing marks. Finally, install camshaft sprocket bolts with 35 nm (26 ft. Lbs) and install Oil Pump.

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