Lycoming YO-233-B2A - Page 141

TEO-540-A1A Engine Maintenance Manual
© 2021 Avco Corporation. All Rights Reserved 72-30
February 2021 Page 121
YO-233-B2A Engine Maintenance Manual
Piston Inspection Checklist for YO-233-B2A Engine Models (Cont.)
Figure 23
Checking Piston Ring Side Clearance
Inspection Item
Findings/Corrective Action
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Measure the
side clearance
between the
piston rings
and piston with
a feeler gauge
and straight
edge (Figure
23).
Top piston
compression
ring
Actual
Measurement**
SSP-1776
Second piston
compression
ring
Actual
Measurement**
SSP-1776
Piston oil ring
Actual
Measurement**
SSP-1776
Measure the
piston ring
end-gap with
feeler gauges.
Complete the
“Piston Ring
End Gap
Check” in this
chapter.
Top piston
compression
ring
Actual
Measurement**
SSP-1776
Second piston
compression
ring
Actual
Measurement**
SSP-1776
Piston oil ring
Actual
Measurement**
SSP-1776
**Compare the actual measurement against the limits in the latest revision of the Service Table of Limits
- SSP-1776. Replace the piston if any of the measurements are out of tolerance.