Camshaft Gear/Sprocket: Service and Repair
Camshaft Phaser and Sprocket
Removal
LH camshaft phaser and sprocket
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Remove the LH Variable Camshaft Timing (VCT) oil control solenoid.
3. Remove the LH Camshaft Position (CMP) sensor.
4. Remove the pin-type retainer, 5 bolts and the RH lower splash shield.
5. NOTICE: The camshafts must be in the neutral position before removing the bearing caps or damage to the engine may occur.
NOTE: The engine front cover is removed for clarity.
Rotate the crankshaft until the LH camshafts are in the neutral position as shown.
6. NOTICE: The Timing Chain Locking Tool must be installed square to the timing chain and the engine block or damage may result.
NOTE: The Timing Chain Locking Tool will lock the timing chain in place.
NOTE: The engine front cover is removed for clarity.
Install the Timing Chain Locking Tool in the LH timing chain as shown.
7. NOTICE: Do not remove the Timing Chain Locking Tool at any time during assembly. If the Timing Chain Locking Tool is removed or out of placement, the engine front cover must be removed and the engine must be retimed. For additional information, refer to Timing Drive Components Removal and Replacement.
NOTICE: The timing chain must be installed in its original position onto the camshaft phaser and sprocket and exhaust camshaft using the marks, or damage to valves and pistons will result.
Mark the timing chain links and LH camshaft phaser and sprocket and exhaust camshaft gear as shown for installation.
8. Loosen the intake camshaft bolts evenly in the sequence shown.
9. Remove the 2 bolts and the intake camshaft bearing thrust cap.
10. NOTICE: Do not allow the camshaft to rotate from the neutral position while removing the camshaft phaser and sprocket or damage to the engine may occur.
NOTICE: Only use hand tools to remove the camshaft phaser and sprocket bolts or damage may occur to the camshaft or camshaft phaser and sprocket.
NOTE: Install a 3/8-in ratchet and extension into the D-slot on the rear of the LH intake camshaft to hold the camshaft in place for removal of the camshaft phaser and sprocket bolts.
Loosen the 3 bolts for the LH camshaft phaser and sprocket.
- Tighten to 18 Nm (159 lb-in).
11. NOTICE: Damage to the camshaft phaser and sprocket assembly will occur if mishandled or used as a lifting or leveraging device.
NOTE: The camshaft will move and needs to be positioned towards the rear of the engine.
Using your hands, press the LH camshaft phaser and sprocket bolts towards the rear of the engine while using a rocking motion to release the LH camshaft phaser and sprocket from the camshaft.
- Once the LH camshaft phaser and sprocket has separated from the camshaft, remove the timing chain from the LH camshaft phaser and sprocket and remove.
RH camshaft phaser and sprocket
12. Remove the RH VCT (Variable Camshaft Timing) oil control solenoid.
13. Remove the RH CMP (Camshaft Position) sensor.
14. Remove the pin-type retainer, 5 bolts and the RH lower splash shield.
15. NOTICE: The camshafts must be in the neutral position before removing the bearing caps or damage to the engine may occur.
NOTE: The engine front cover is removed for clarity.
Rotate the crankshaft until the RH camshafts are in the neutral position as shown.
16. NOTICE: The Timing Chain Locking Tool must be installed square to the timing chain and the engine block or damage may result.
NOTE: The Timing Chain Locking Tool will lock the timing chain in place.
NOTE: The engine front cover is removed for clarity.
Install the Timing Chain Locking Tool in the RH timing chain as shown.
17. NOTICE: Do not remove the Timing Chain Locking Tool at any time. If the Timing Chain Locking Tool is removed or out of placement, the engine front cover must be removed and the engine must be retimed. For additional information, refer to Timing Drive Components Removal and Replacement.
NOTICE: The timing chain must be installed in its original position onto the camshaft phaser and sprocket and exhaust camshaft gear using the marks, or damage to valves and pistons will result.
Mark the timing chain links and RH camshaft phaser and sprocket and exhaust camshaft gear as shown for installation.
18. Loosen the intake camshaft bolts evenly in the sequence shown.
19. Remove the 2 bolts and the intake camshaft bearing thrust cap.
20. NOTICE: Do not allow the camshaft to rotate from the neutral position while removing the camshaft phaser and sprocket or damage to the engine may occur.
NOTICE: Only use hand tools to remove the camshaft phaser and sprocket bolt or damage may occur to the camshaft or camshaft phaser and sprocket.
NOTE: Install a 3/8-in ratchet and extension into the D-slot on the rear of the RH intake camshaft to hold the camshaft in place for removal of the camshaft phaser and sprocket bolts.
NOTE: The engine front cover is removed for clarity.
Loosen the 3 bolts for the RH camshaft phaser and sprocket.
- Tighten to 18 Nm (159 lb-in).
21. NOTICE: Damage to the camshaft phaser and sprocket assembly will occur if mishandled or used as a lifting or leveraging device.
NOTE: The camshaft will move and needs to be positioned towards the rear of the engine.
Using your hands, press the RH camshaft phaser and sprocket bolts towards the rear of the engine while using a rocking motion to release the RH camshaft phaser and sprocket from the camshaft.
- Once the RH camshaft phaser and sprocket has separated from the camshaft, remove the timing chain from the RH camshaft phaser and sprocket and remove.
Installation
RH camshaft phaser and sprocket
1. NOTICE: Do not remove the Timing Chain Locking Tool at any time during installation. If the Timing Chain Locking Tool is removed or out of placement, the engine front cover must be removed and the engine must be retimed. For additional information, refer to Timing Drive Components Removal and Replacement.
NOTICE: The timing chain must be installed in its original position onto the camshaft phaser and sprocket using the marks, or damage to valves and pistons will result.
NOTE: If replacement of the camshaft phaser and sprocket is necessary, transfer the mark to the new camshaft phaser and sprocket.
Position the RH camshaft phaser and sprocket into the timing chain with the alignment marks.
- Make sure the timing chain mark is in alignment with the exhaust camshaft gear mark.
2. NOTICE: Do not allow the camshaft to rotate from the neutral position while installing the camshaft phaser and sprocket or damage to the engine may occur.
NOTICE: Only use hand tools to install the camshaft phaser and sprocket bolts or damage may occur to the camshaft or camshaft phaser and sprocket.
Using the 3/8-in ratchet and extension into the D-slot on the rear of the RH intake camshaft, align the RH camshaft phaser and sprocket with the camshaft and install the 3 bolts.
- Tighten the 3 bolts in a clockwise pattern until the RH camshaft phaser and sprocket is seated on the camshaft.
- Torque the 3 bolts to 18 Nm (159 lb-in), using the 3/8-in ratchet and extension to hold camshaft from turning.
3. Lubricate the bearing surface of the RH intake camshaft bearing thrust cap with clean engine oil and install the camshaft bearing thrust cap and the 2 bolts.
- Do not torque at this time.
4. Tighten the RH intake camshaft bearing cap bolts in the sequence shown in 2 stages.
- Stage 1: Tighten to 10 Nm (89 lb-in).
- Stage 2: Individually loosen and then tighten each camshaft bearing cap to 10 Nm (89 lb-in).
5. Verify the timing chain links and RH camshaft phaser and sprocket and exhaust camshaft gear are in alignment.
6. NOTE: The engine front cover is removed for clarity.
Remove the Timing Chain Locking Tool from the RH timing chain.
7. Install the RH lower splash shield, pin-type retainer and the 5 bolts.
- Tighten to 9 Nm (80 lb-in).
8. Install the RH CMP (Camshaft Position) sensor.
9. Install the RH VCT (Variable Camshaft Timing) oil control solenoid.
LH camshaft phaser and sprocket
10. NOTICE: Do not remove the Timing Chain Locking Tool at any time during installation. If the Timing Chain Locking Tool is removed or out of placement, the engine front cover must be removed and the engine must be retimed. For additional information, refer to Timing Drive Components Removal and Replacement.
NOTICE: The timing chain must be installed in its original position onto the camshaft phaser and sprocket using the marks, or damage to valves and pistons will result.
NOTE: If replacement of the camshaft phaser and sprocket is necessary, transfer the mark to the new camshaft phaser and sprocket.
Position the LH camshaft phaser and sprocket into the timing chain with the alignment marks.
- Make sure the timing chain mark is in alignment with the exhaust camshaft gear mark.
11. NOTICE: Do not allow the camshaft to rotate from the neutral position while installing the camshaft phaser and sprocket or damage to the engine may occur.
NOTICE: Only use hand tools to install the camshaft phaser and sprocket bolts or damage may occur to the camshaft or camshaft phaser and sprocket.
Using the 3/8-in ratchet and extension into the D-slot on the rear of the LH intake camshaft, align the LH camshaft phaser and sprocket with the camshaft and install the 3 bolts.
- Tighten the 3 bolts in a clockwise pattern until the LH camshaft phaser and sprocket is seated on the camshaft.
- Torque the 3 bolts to 18 Nm (159 lb-in), using the 3/8-in ratchet and extension to hold camshaft from turning.
12. Lubricate the bearing surface of the LH intake camshaft bearing thrust cap with clean engine oil and install the camshaft bearing thrust cap and the 2 bolts.
- Do not torque at this time.
13. Tighten the LH intake camshaft bearing cap bolts in the sequence shown in 2 stages.
- Stage 1: Tighten to 10 Nm (89 lb-in).
- Stage 2: Individually loosen and then tighten each camshaft bearing cap to 10 Nm (89 lb-in).
14. Verify the timing chain links and LH camshaft phaser and sprocket and exhaust camshaft gear are in alignment.
15. NOTE: The engine front cover is removed for clarity.
Remove the Timing Chain Locking Tool from the LH timing chain.
16. Install the RH lower splash shield, pin-type retainer and the 5 bolts.
- Tighten to 9 Nm (80 lb-in).
17. Install the LH CMP (Camshaft Position) sensor.
18. Install the LH VCT (Variable Camshaft Timing) oil control solenoid.