2. Inspect the spark-plug holes for any damaged threads. Repair damaged threads using a “heli-coil� insert.
Cleaning and Inspecting Engine
3. Inspect the cylinder head for flatness using a straightedge and a feeler gauge. Acceptable warpage must not exceed 0.05 mm (0.002 in.).
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1. Using a non-metallic carbon removal tool, remove any carbon buildup from the combustion chambers being careful not to nick, scrape, or damage the combustion chambers or the sealing surfaces. 2. Inspect the spark-plug holes for any damaged threads. Repair damaged threads using a “heli-coil� insert. 3. Place the cylinder heads on a Surface Plate (p/n 0644-016) covered with #400 grit wet-or-dry sandpaper. Using light pressure, move each cylinder head in a figure eight motion. Inspect the sealing surface for any indication of high spots. A high spot can be noted by a bright metallic finish. Correct any high spots before assembly by continuing to move the cylinder head in a figure eight motion until a uniform bright metallic finish is attained. )LJ
$1 '
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1. Using a non-metallic carbon removal tool, remove carbon buildup from the exhaust ports. 2. Wash the cylinders in parts-cleaning solvent. 3. Inspect the cylinders for pitting, scoring, scuffing, and corrosion. If marks are found, repair the surface with Ball Hone (p/n 0644-036) for the 600 cc or (p/n 0644-037) for the 800 cc or with #500 grit stones and honing oil. $4 '
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1. Using a non-metallic carbon removal tool, remove any carbon buildup from the combustion chambers being careful not to nick, scrape, or damage the combustion chambers or the sealing surfaces. $1