1. Cylinder Block Service

1.12. SKILL DRILL 8-4  Visually Evaluating Cylinder Wear

SKILL DRILL 8-4  Visually Evaluating Cylinder Wear

 

  Fig6_01  

 

One effective method to visually evaluate cylinder wear is to examine the ring turnaround area.

STEP 1
Measure the length of the missing crosshatch worn away by the top ring by using a piece of white paper to reflect light directly into the crosshatch.

STEP 2
Measure the stroke length of the cylinder and compare it to the length of the missing crosshatch area.

STEP 3
If 20% or more of the crosshatch is missing, 0% service life remains. If 10% of the crosshatch is missing, 50% service life remains. An engine with a 5" (13 cm) stroke and 0.25" (6 mm) of polish has 75% service life remaining.

 

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