Cylinder
Inspect and Measure Cylinder
1. Using a plastic scraper, remove all traces of head
gasket and cover gasket material.
• Visually check cylinder for cracks, stripped threads,
and bore damage. Bore damage, if not severe, may
be corrected by reconditioning or resizing.
• If cracks are found, replace the cylinder.
• Stripped threads can sometimes be repaired using
a helicoil, but if multiple holes have thread damage,
replace the cylinder.
2. Using a straight edge, check across cylinder head
mounting surface for distortion. If mounting surface is
distorted more than 0.004” (0.1 mm), the cylinder must
be replaced.
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3. Using a Dial Bore Gauge #19487 (preferred), or a
Telescoping Gauge #19485 and Dial Caliper #19609,
measure the diameter of the bore. If necessary,
recondition or resize the bore as described below.
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Take two measurements (90° apart) at the top, center,
and bottom of the piston ring travel.
Compare measurements to the standard cylinder bore
size provided in
Section 13 - Engine Specifications
.
Recondition Cylinder Bore
If cylinder bore is within specification and shows no signs
of scoring or other damage, it can be reconditioned using
a rigid hone with finishing stones to restore the proper
crosshatch angle.
The correct crosshatch of approximately 45° ensures proper
lubrication and piston ring break-in.
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