Removal and Replacement

Camshafts









Removal

NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan can cause engine failure.

NOTICE: Do not rotate the camshafts unless instructed to in this procedure. Rotating the camshafts or crankshaft with timing components loosened or removed can cause serious damage to the valves and pistons.

1. Remove the camshaft phaser and sprockets. For additional information, refer to Camshaft Phaser and Sprocket Service and Repair.

2. Using the Input Shaft Oil Seal Remover and Slide Hammer, remove the 2 camshaft oil seals.





3. NOTE: Note the position of each component before removal.
Remove the bolts for the camshaft bearing caps and Variable Camshaft Timing (VCT) bridge in the sequence shown.

- Inspect and replace the VCT (Variable Camshaft Timing) bridge O-ring seal, if necessary.






4. NOTICE: Do not pry on camshafts when removing or damage to the camshafts may occur.

Remove the 2 camshafts from the cylinder head.






5. If necessary, remove the 2 bolts and the camshaft trigger wheels.





Installation

1. If removed, install the camshaft trigger wheels and the 2 bolts.
- Tighten to 21 Nm (15 lb-ft).






2. NOTE: Lubricate the camshafts with clean engine oil.
Install the camshafts as shown.






3. Install the VCT (Variable Camshaft Timing) bridge O-ring seal.





4. NOTE: The VCT (Variable Camshaft Timing) bridge must be installed within 5 minutes of applying the gasket maker to the cylinder head.
Apply a 1.5 mm (0.059 in) bead of gasket maker to the cylinder head as shown.






5. NOTICE: Make sure that the camshafts and camshaft bearing caps are installed in their original locations or damage to the engine may occur.

NOTE: Apply clean engine oil to the bearing surfaces of the camshaft bearing caps and the VCT (Variable Camshaft Timing) bridge.
Install the camshaft bearing caps, VCT (Variable Camshaft Timing) bridge and the bolts finger tight.






6. Tighten the bolts in the sequence shown in 6 stages.
- Stage 1: Tighten the bolts evenly, half a turn at a time, until the camshaft bearing caps and the VCT (Variable Camshaft Timing) bridge are seated against the cylinder head.

- Stage 2: Tighten bolts 1 through 16 to 7 Nm (62 lb-in).

- Stage 3: Tighten bolts 17 through 20 to 10 Nm (89 lb-in).

- Stage 4: Tighten bolts 1 through 16 an additional 45 degrees.

- Stage 5: Tighten bolts 17 and 19 an additional 70 degrees.

- Stage 6: Tighten bolts 18 and 20 an additional 53 degrees.






7. If the cylinder head, camshafts or valve tappets were replaced, check the valve clearance. For additional information, refer to Valve Clearance Check Adjustments.

8. Using the Camshaft Seal Installer, install the 2 camshaft oil seals.





9. Install the camshaft phaser and sprocket. For additional information, refer to Camshaft Phaser and Sprocket Service and Repair.