Cylinder and piston eng

F-13

Piston skirt diameter

See CYLINDER section for cylinder bore measu- rement

If not as specified, replace the piston and piston rings as a set

Piston-to-cylinder clearance: 0.025 ~ 0.035 mm

3. Measure:

• Piston bore diameter

If not as specified, replace

	Piston bore diameter: 15.002 ~ 15.013 mm
<Limit:	15.045	mm>

4. Measure:

• Piston pin outside diameter If not as specified, replaced

	Piston pin outside diameter: 14.991 ~ 15.000 mm
<Limit:	14.975	mm>

5. Check:

• Piston pin

If it is grooved or has a blue discoloration, repla- ce or clean

CHECKING PISTON RINGS

1. Measure:

• Side clearance

If not as specified, replace the piston and the piston rings as a set

NOTE:

Clean away carbon deposits from the piston ring grooves and rings before measuring the side clearance Ø

	Side clearance (piston ring): Top ring:
0.03 ~ 0.07 mm <Limit: 0.12 mm> 2nd ring: 0.02 ~ 0.06 mm <Limit: 0.12 mm>

2. Position:

• Piston ring Ø

(into the cylinder)

NOTE:

Push the ring with the piston crown so that the ring is at a right angle to the cylinder bore

§a 50 mm

3. Measure:

• End gap

If not as specified, replace

NOTE:

	End gap: Top ring:
0.15 ~ 0.25 mm
<Limit: 0.50 mm>
2nd ring
0.15 ~ 0.30 mm
<Limit: 0.65 mm>
Oil ring
0.20 ~ 0.70 mm

You cannot measure the end gap on the expander spacer of the oil ring. If the oil ring rails show exces- sive gap, replace all three rings.

CYLINDER AND PISTON ENG

INSTALLING PISTON RINGS, PISTON AND CYLINDER

1. Install:

• Expander spacer (oil ring)

• Side rails (oil ring) Ø

• 2nd ring Ø

• Compression ring Ø

NOTE:

Make sure to install the piston rings so that the manu- facturer’s marks or numbers are located on the upper side of the rings

Lubricate pistons and piston rings liberally with engi- ne oil

2. Install:

• Piston Ø

• Piston clip Ø

• Piston pin clip Ø

NOTE:

Apply engine oil to the piston pins

The “—(“ mark §a on the piston must face the

exhaust side of the cylinder

Before installing the piston pin clip, cover the crank- case opening with a clean rag to prevent the piston clip from falling into the crankcase

Make sure to install each piston in its respective cylin- der

s WARNING:

Дата добавления: 2014-12-23