Static Engine Off Valve Train Analysis

(Rocker Arm Cover Removed)

NOTE: Refer to Section 03-01A (2.3L) or Section 03-01B (5.0L) for the Removal and Installation of the engine rocker arm cover.

Check for damaged and/or severely worn parts, for correct assembly, and ensure use of correct parts by proceeding, as follows, with the static engine analysis.

Rocker Arm Assemblies

• Check for loose mounting bolts, studs and nuts.
• Check for plugged oil feed in the rocker arm or cylinder head.
• Check that roller rockers are centered over the stem (5.0L Cobra only).

Push Rods (if equipped)

• Check for bent push rods and restriction in oil passage.

Valve Springs

• Check for broken or damaged parts.

Retainer and Keys

• Check for proper seating of keys on valve stem and in retainer.

Positive Rotator and Keys

• Check for proper seating in the positive rotator, and on valve stem.

Valves and Cylinder Head

• Check the cylinder head gasket for proper installation.
• Check for plugged oil drain back holes.
• Check for worn or damaged valve tips.
• Check for missing or damaged guide-mounted valve stem oil seals.
• Check collapsed tappet gap, hydraulic tappet applications.
• Check installed spring height.
• Check for missing or worn valve spring seats, if equipped.

Overhead Cam Follower Arm and Lash Adjuster Assemblies

• Check for broken or severely worn parts.
• Check for "soft" lash adjuster with hand pressure on rocker arm (arm on base circle of camshaft).

Camshaft—Overhead Camshaft Engines

• Check for plugged oil feed.
• Check for correct cam lift.
• Check for correct camshaft end plug.
• Check for presence of camshaft oil plug located at distributor end of camshaft (2.3L).