Cleaning and Inspection Procedure - Conditional
The following cleaning and inspection and/or overhaul steps are ONLY to be performed as determined necessary based on the condition of the part being removed with the intention of reinstallation. The labor time to perform any of these steps is not included in the base labor time and if required would need to be documented and submitted as Other Labor Hours for warranty claim reimbursement. A description of the repairs performed must be documented in the technician correction comments.
- Inspection the spark plug wire for the following conditions:
- Correct routing of the spark plug wires. Incorrect routing may cause cross-firing.
- Inspect for any signs of cracks or splits in the wires.
- Inspect each boot for the following conditions:
- Tearing
- Piercing
- Arcing
- Carbon tracking
- Corroded terminals
- If corrosion, carbon tracking or arcing are indicated on a spark plug wire boot or on a terminal, replace the wire and the component connected to the wire.
Remove the 8 ignition coil bolts (1) and 4 ignition coils (2) before cleaning the valve rocker arm cover (3) in solvent. Do NOT submerge the 4 ignition coils (2) in solvent.
- Inspect the valve rocker arm cover (3) for the following conditions:
- Scoring or damage to the gasket surfaces
- Ventilation system passages for restrictions
- Threaded bolt holes for damage or debris
- Install the 4 ignition coils (2).
- Install and tighten the 8 ignition coil bolts (1). Fastener Specifications
- NOTE:
Parts that are to be used again must be marked, sorted or organized for assembly.
Mark, sort, or organize the components for assembly.
- Clean the components with cleaning solvent.
- Dry the components with compressed air.
- Inspect the valve rocker arms bearings (2) for binding or roughness.
- Inspect the valve rocker arm pushrod sockets (3) and valve stem mating surfaces (1). These surfaces should be smooth with no scoring or exceptional wear.
- Inspect the pushrods for worn or scored ends. These surfaces should be smooth with no scoring or exceptional wear.
- Inspect the pushrods for bends. Roll the pushrod on a flat surface to determine if the pushrod is bent.
- Inspect the pushrod oil passages for restrictions.
- Inspect the rocker arm pivot supports for cracks, wear, or other damage.
Spark plug wire integrity is vital for proper engine operation. A thorough inspection will be necessary to accurately identify conditions that may affect engine operation.
Refer to Fastener Caution .
Refer to Safety Glasses and Compressed Air Warning .