Valve Inspection

VALVE INSPECTION

Valve Inspection





1. Measure the diameter of each intake valve stem at the points shown. Verify the diameter is within specification.
2. Measure the diameter of each exhaust valve stem at the points shown. Verify the diameter is within specification.

Valve Stem Oil Clearance Inspection

1. Install the Valve Stem Clearance Tool TOOL-6505-E or equivalent on the valve stem and install Dial Indicator With Bracketry. Lower the valve until the Valve Stem Clearance Tool contacts the upper surface of the valve guide.

Note
^ The valve stem diameter must be within specification before checking valve stem-to-valve guide clearance.





2. Move the Valve Stem Clearance Tool TOOL-6505-E or equivalent toward the Dial Indicator and zero the Dial Indicator. Move the Valve Stem Clearance Tool away from the Dial Indicator and note the reading. The reading will be double the valve stem-to-valve guide clearance.





3. Inspect the following valve areas:
^ The (A) end of the stem for grooves or scoring.
^ The (B) valve face for pits, grooves or scores.
^ The (C) valve head for signs of burning, erosion, warpage and cracking. Minor pits, grooves and other abrasions may be removed.
^ The (D) valve face angle for wear.

Valve Clearance Inspection

1. Position the camshaft so that the base circle of the lobe is facing the cam follower of the valve to be checked.





2. Using Valve Spring Compressor 49 UNO1 135 slowly apply pressure to the cam follower until the lash adjuster is completely collapsed. Hold the follower in this position and insert the proper size feeler gauge between the base circle of the cam and the follower.