Timing Chain Crankshaft Sprocket Replacement
Timing Chain Crankshaft Sprocket Replacement
Special Tools
EN-50837 - Timing Chain Tensioner Retraction Tool
For equivalent regional tools, refer to Special Tools Special Tools.
Removal Procedure
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement (LCV) Camshaft Cover ReplacementCamshaft Cover Replacement (LTG) Camshaft Cover Replacement.
2. Remove the timing chain. Refer to Camshaft Timing Chain and Tensioner Replacement Camshaft Timing Chain and Tensioner Replacement.
3. Remove the balancer chain tensioner bolt (1).
4. Remove the balancer chain tensioner (2).
5. Compress and lock the tensioner using EN-50837 - retention tool.
1. Insert EN-50837 - retention tool into the lever arm and push in a counterclockwise direction.
2. Compress the tensioner while holding lever arm.
3. Relax the force on the lever and tensioner slightly, allowing the tensioner to extend 3 ratchet clicks, and then hold in place.
4. Pull lever clockwise using EN-50837 - retention tool until the hole in the lever aligns with the hole in the tensioner assembly. Push the point of EN-50837 - retention tool through the lever and into the tensioner assembly.
6. Remove the balancer chain guide bolt (1).
7. Remove the balancer chain guide (2).
8. Remove and discard the balancer shaft driven sprocket bolt (1).
9. Remove the crankshaft sprocket, balancer shaft driven sprocket, and balancer chain (1) simultaneously.
Installation Procedure
Note: Proper setup is critical to ensure correct timing when installing the sprockets and chain simultaneously onto the shafts. The timing links are heat treated blued steel.
1. Assemble the crankshaft sprocket, balancer shaft driven sprocket, and balancer chain. Ensure the timing link (1) lines up with the timing mark (2) on the crankshaft sprocket. Ensure that both timing teeth (3) on the balancer shaft driven sprocket line up with the timing links (4).
Note: The crankshaft keyway should be in the 12 O'clock position.
2. Install the sprockets and chain (1) as an assembly to the crankshaft and balancer shaft assembly.
3. Ensure the timing link (1) is aligned with the crankshaft sprocket timing mark (2).
4. Ensure the adjacent timing links (4) are aligned with both of the timing marks (3) on the balancer shaft driven sprocket.
Caution: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
5. Install the NEW balancer shaft driven sprocket bolt (1).
Caution: Refer to Fastener Caution Fastener Caution.
6. Tighten the balancer shaft driven sprocket bolt to 40 Nm (30 lb ft) plus 50 degrees.
Note: Ensure the guide is installed in the correct orientation. The long end must point toward the crankshaft and the flat edge must be adjacent to the balance chain.
7. Install the balancer chain guide (2).
8. Install the balancer chain guide bolts (1). Tighten the bolts to 10 Nm (89 lb in).
9. Install the balancer chain tensioner (2).
10. Install the balancer chain tensioner bolts (1). Tighten the bolts to 10 Nm (89 lb in).
11. Remove EN-50837 - retention tool to restore the tension to the balancer chain.
12. Install the timing chain. Refer to Camshaft Timing Chain and Tensioner Replacement Camshaft Timing Chain and Tensioner Replacement.
13. Install the camshaft cover. Refer to Camshaft Cover Replacement (LCV) Camshaft Cover ReplacementCamshaft Cover Replacement (LTG) Camshaft Cover Replacement.