Valve Spring: Service and Repair

Valve Stem Oil Seal and Valve Spring Replacement

Special Tools
* J 38820 Valve Stem Seal Remover and Installer
* J 44222 Camshaft Sprocket Holding Tool
* J-44228-A Valve Spring Compressor
* J 44226 Crankshaft Balancer Remover

Removal Procedure

Note:
* Organize the valve train components when disassembling so they can be reassembled in the same location and matched up with the same components, as previously installed.
* Regulate the air pressure to 50 psi before pressurizing the cylinder to help prevent the crankshaft from turning.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).




2. Remove the torque converter access plug.
3. Use the J 44226-3A 15 mm holding bar on a torque converter bolt to prevent the crankshaft from turning.
4. Lower the vehicle.




5. Remove and discard the timing gear bolts.
6. Install the J 44222 onto the cylinder head in order to keep from disturbing the timing chain components.
7. Adjust the 2 horizontal bolts into the camshaft sprockets to maintain chain tension.
8. Carefully move the sprockets with the timing chain, off of the camshafts.
9. Remove the camshaft cap bolts.





Note: Place the camshaft caps in a rack to ensure the caps are installed in the same location from which they were removed.

10. Remove the camshaft caps.




11. Remove the camshafts.
12. Using a suitable adapter, apply air pressure to the cylinder.




13. Install the J-44228-A and compress the valve springs.




14. Remove the valve keys.
15. Remove the J-44228-A .




16. Remove the valve spring retainer and the valve spring.




17. Use the J 38820 and remove the seals.
18. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection (Cylinder Head Cleaning and Inspection).

Installation Procedure

Note: Lubricate the valve stems with clean engine oil before installing.




1. Use the J 38820 to install the valve seals. There is only one size seal.




2. Install the valve spring and the valve spring retainer.




3. Use the J-44228-A and compress the valve springs.




4. Install the valve keys.
5. Remove the J-44228-A .
6. Remove the air pressure to the cylinder.
7. Coat the camshaft journals, the camshaft journal thrust face, and the camshaft lobes with clean engine oil.




8. Install the camshafts to their original position.





Caution: Refer to Fastener Caution (Fastener Caution).

9. Install the camshaft caps onto their original journal. Tighten the camshaft cap bolts to 12 Nm (106 in. lbs.).




10. Carefully move the camshaft sprockets back onto the camshafts and remove the J 44222 .
11. Install a NEW intake camshaft sprocket washer and bolt, and a NEW exhaust camshaft actuator bolt.

* Tighten the intake camshaft sprocket bolt the first pass to 20 Nm (15 ft. lbs.).
* Use the J 36660-A to tighten the intake camshaft sprocket bolt the final pass and additional 100 degrees.
* Tighten the exhaust camshaft actuator bolt the first pass to 25 Nm (18 ft. lbs.).
* Use the J 36660-A to tighten the exhaust camshaft actuator bolt a final pass an additional 135 degrees.

12. Install the spark plugs. Refer to Spark Plug Replacement (Service and Repair).
13. Install the camshaft cover. Refer to Camshaft Cover Replacement (Service and Repair).
14. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
15. Remove the J 44226-3A from the torque converter bolt.




16. Install the torque converter access plug.
17. Lower the vehicle.