Honda EU10iT1, Manual

Page: 125 / 138

15-10
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CYLINDER BLOCK
PISTON RING SIDE CLEARANCE
Measure the clearance between each piston ring and
ring groove of the piston using feeler gauge.
If any measurement is more than the service limit,
inspect the piston ring width.
If the piston ring width is normal, replace the piston and
reinspect the clearance.
If necessary, replace the piston rings (top, second, oil)
as a set and reinspect the clearance.
If the measurement is still more than the service limit
with a new piston rings, replace the piston.
PISTON RING WIDTH
Measure each piston ring width.
If any measurement is less than the service limit,
replace the piston rings (top, second, oil) as a set.
PISTON RING END GAP
Before inspection, check whether the cylinder sleeve
I.D. is within the specification (page 15-8).
Insert each piston ring into the bottom of the cylinder
sleeve squarely using the piston.
Measure each piston ring [1] end gap using a feeler
gauge.
If any measurement is more than the service limit,
replace the piston rings (top, second, oil) as a set.
STANDARD:
Top: 0.015 – 0.050 mm (0.0006 – 0.0020 in)
Second: 0.015 – 0.050 mm (0.0006 – 0.0020 in)
SERVICE LIMIT:
Top: 0.12 mm (0.005 in)
Second: 0.12 mm (0.005 in)
STANDARD:
Top: 0.77 – 0.79 mm (0.030 – 0.031 in)
Second: 0.97 – 0.99 mm (0.038 – 0.039 in)
SERVICE LIMIT:
Top: 0.72 mm (0.028 in)
Second: 0.92 mm (0.036 in)
STANDARD:
Top: 0.150 – 0.300 mm (0.0059 – 0.0118 in)
Second: 0.150 – 0.300 mm (0.0059 – 0.0118 in)
Oil
(side rail): 0.20 – 0.70 mm (0.008 – 0.028 in)
SERVICE LIMIT:
Top: 0.600 mm (0.0236 in)
Second: 0.600 mm (0.0236 in)
Oil
(side rail): 1.0 mm (0.04 in)
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