Valve Train Components Cleaning and Inspection Sprockets and Chain

1. Clean the components with cleaning solvent.

Caution: Wear safety glasses in order to avoid eye damage.

2. Dry the components with compressed air.



3. Inspect the timing chain for binding or wear.



4. Inspect the camshaft and crankshaft sprockets for:

•	Worn teeth (1)

•	Damaged teeth (2)

•	Chipped teeth (3)

•	Worn valleys between the sprocket teeth




5. Inspect the crankshaft sprocket keyway for wear.
6. Inspect the crankshaft sprocket oil pump drive splines for wear.

Valve Train Components Cleaning and Inspection Rocker Arms and Pushrods

Important: Parts that are to be reused must be marked, sorted or organized for assembly.

1. Mark, sort, or organize the components for assembly.

Refer to Separating Parts .

2. Clean the components with cleaning solvent.

Caution: Wear safety glasses in order to avoid eye damage.

3. Dry the components with compressed air.



4. Inspect the valve rocker arms bearings for binding or roughness.
5. Inspect the valve rocker arm pushrod sockets and valve stem mating surfaces. These surfaces should be smooth with no scoring or exceptional wear.



6. Inspect the pushrods for worn or scored ends. These surfaces should be smooth with no scoring or exceptional wear.
7. Inspect the pushrods for bends. Roll the pushrod on a flat surface to determine if the pushrod is bent.
8. Inspect the pushrod oil passages for restrictions.



9. Inspect the pivot supports for cracks, wear, or other damage.

Valve Train Components Cleaning and Inspection Valve Lifters and Guides

Important: Components that are to be reused must be marked, sorted or organized for assembly.

1. Mark, sort, or organize the components for assembly.

Refer to Separating Parts .

2. Clean the components in cleaning solvent.

Caution: Wear safety glasses in order to avoid eye damage.

3. Dry the components with compressed air.



4. Inspect the valve lifters for the following:

•	Bent or broken clip (1)

•	Worn pushrod socket (2)

•	Scuffed or worn sides (3)

•	If the valve lifter shows wear, inspect the engine block lifter bores for wear or damage.

•	Flat spots on the roller (4)

•	Loose or damaged pin (5)

•	Plugged oil hole (6)

•	Worn or damaged roller bearing

•	The roller should rotate freely with no binding or roughness.




5. Inspect the valve lifter guides for the following:

•	For cracks or damage

•	Excessive wear in the lifter mounting bores