Camshaft Replacement

Camshaft Replacement

Special Tools
* J-26900-12 - Dial Indicator
* J-26900-13 - Magnetic Base
* J-44643 - Flywheel Holding Tool

For equivalent regional tools, refer to Special Tools (Special Tools).

Removal Procedure

1. Remove the valve lifters. Refer to Valve Lifter Replacement (Service and Repair).
2. Remove the starter. Refer to Starter Replacement Service and Repair.




3. Install the J-44643 - tool in order to hold the flywheel (1).
4. Remove the engine front cover. Refer to Engine Front Cover Replacement (Service and Repair).
5. Remove the oil pump drive gears and crankshaft reluctor. Refer to Oil Pump Replacement (Service and Repair).




6. Using J-26900-12 - indicator (1) and J-26900-13 - base (2), measure the camshaft end play.

* The production value is 0.050-0.114 mm (0.002-0.0045 in) and service limit is 0.20 mm (0.008 in).
* Replace the camshaft gear or the camshaft thrust plate if measured value exceeds service limit.




7. Remove the camshaft reluctor screws (1).
8. Remove the camshaft reluctor (2).




9. Align the threaded hole with a suitable tool and install an exciter ring bolt (1) to secure the spring tension.




10. Remove the camshaft thrust plate bolts (1) through the holes in the camshaft gear (2).
11. In order to loosen the camshaft gear bolt use J-44643 - tool in order to hold the engine from turning.

Warning

The two piece cam gear must be bolted together to prevent the spring tension from unloading upon removal. Additionally, the two piece cam gear must remain bolted together until it is re-installed to the camshaft and fully engaged to the crankshaft gear. Failure to do so may result in personal injury.

12. Loosen the camshaft gear bolt and leave the bolt finger tight.
13. Remove the camshaft thrust plate bolts through the holes in the camshaft gear.




14. Remove the camshaft (1) with the camshaft gear (2) attached.




15. Remove the camshaft gear bolt (1) and discard.
16. Remove the camshaft gear (2).
17. Remove the camshaft thrust plate (3).
18. Clean and inspect the camshaft and bearings. Refer to Camshaft and Bearings Cleaning and Inspection (49. Camshaft and Bearings Cleaning and Inspection).
If the camshaft bearings are worn or damaged the engine will require removal in order to replace the camshaft bearings. Refer to Engine Replacement (Removal and Replacement).

Installation Procedure




1. Install the camshaft thrust plate (3) to the camshaft.
2. Install the camshaft driven gear (2).
3. Install a NEW camshaft driven gear bolt (1).
Leave the bolt finger tight.




4. Remove the J-44643 - tool then rotate the engine to align the timing marks.
5. Reinstall the J-44643 - tool.
6. Install the camshaft into the cylinder block, align the camshaft gear to the crankshaft gear as shown.




7. Apply threadlock to the threads of the camshaft thrust plate bolts (1). Refer to Adhesives, Fluids, Lubricants, and Sealers (Adhesives, Fluids, Lubricants, and Sealers) for the correct part number.

Caution: Refer to Fastener Caution (Fastener Caution).

8. Install the camshaft thrust plate bolts (1) and tighten to 22 Nm (16 lb ft).




9. Install the camshaft reluctor to the camshaft gear (2).
10. Install the camshaft reluctor bolts (1) and tighten in a cross-bolt pattern to 9 Nm (80 lb in).




11. Reinstall J-44643 - tool in the starter opening, if removed.
12. Install a NEW camshaft gear bolt and tighten to 234 Nm (173 lb ft).




13. Using J-26900-12 - indicator (1) and J-26900-13 - base (2) measure the camshaft end play.

* The production value is 0.050-0.114 mm (0.002-0.0045 in) and service limit is 0.20 mm (0.008 in).
* Replace the camshaft gear or the camshaft thrust plate if measured value exceeds the service limit.

14. Install the oil pump drive gears and reluctor to the crankshaft. Refer to Oil Pump Replacement (Service and Repair).
15. Install the engine front cover. Refer to Engine Front Cover Replacement (Service and Repair).




16. Remove the J-44643 - tool.
17. Install the starter. Refer to Starter Replacement Service and Repair.
18. Install the valve lifters. Refer to Valve Lifter Replacement (Service and Repair).