Valve Spring: Service and Repair
Valve Stem Oil Seal and Valve Spring ReplacementTools Required
^ J 38820 Valve Stem Seal Remover and installer
^ J 44222 Camshaft Sprocket Holding Tool
^ J 44228 Valve Spring Compressor
Removal Procedure
Important: 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.
1. Remove the cam cover.
2. Remove the spark plugs.
3. Remove the exhaust and the intake sprocket bolts.
4. Install the J 44222 onto the cylinder head in order to keep from disturbing the timing chain components.
5. Adjust the 2 horizontal bolts into the camshaft sprockets to maintain chain tension.
6. Carefully move the sprockets with the timing chain, off of the camshafts.
7. Remove the camshaft cap bolts.
Important: Place the camshaft caps in a rack to ensure the caps are installed in the same location from which they were removed.
8. Remove the camshaft caps.
9. Remove the camshafts.
10. Using a suitable adapter, apply air pressure to the cylinder.
11. Install the J 44228 and compress the valve springs.
12. Remove the valve keys.
13. Remove the J 44228.
14. Remove the valve spring retainer and the valve spring.
15. Use the J 38820 and remove the seals.
16. Clean and inspect the cylinder head.
Installation Procedure
Important: 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 and compress the valve springs.
4. Install the valve keys.
5. Remove the J 44228.
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.
Notice: Refer to Fastener Notice in Service Precautions.
9. Install the camshaft caps onto their original journal.
^ Tighten the camshaft cap bolts to 12 Nm (106 inch lbs.).
10. Carefully move the camshaft sprockets back onto the camshafts and remove the J 44222.
11. Install the intake camshaft sprocket washer and the bolt, and the 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.
13. Install the camshaft cover.