Section 03
ENGINE
Subsection 09
(CYLINDER AND HEAD)
VMR2004_132_03_09A.FM
03-09-23
NOTE:
Make sure used piston is not worn. See
PISTON MEASUREMENT
above.
If clearance exceeds specified tolerance, replace
cylinder.
NOTE:
Make sure the cylinder bore gauge
indicator is set exactly at the same position as with
the micrometer, otherwise the reading will be
false.
Piston Pin
Using synthetic abrasive woven, clean piston pin
from deposits.
Inspect piston pin for scoring, cracking or other
damages.
Measure piston pin. See the following illustration
for the proper measurement positions.
A. Piston pin diameter
Replace piston pin if diameter is out of specifications.
Piston Pin/Connecting Rod Bushing Clearance
Measure inside diameter of connecting rod.
1. Connecting rod small end
A. Connecting rod small end diameter
Replace crankshaft if diameter of connecting
rod small end is out of specifications. Refer to
CRANKSHAFT/BALANCER SHAFT for removal
procedure.
Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
Apply engine oil on the piston pin.
Insert piston pin into piston and connecting rod.
CAUTION:
Take care that piston will be installed
with the punched arrow on piston top to the
exhaust side.
1. Arrow should indicate to the exhaust side
2. Area of timing chain compartment
Use the piston circlip installer (P/N 529 035 921) to
assemble the new piston circlip as per following
procedure:
PISTON PIN DIAMETER
NEW MINIMUM
19.996 mm (.7872 in)
NEW MAXIMUM
20.000 mm (.7874 in)
SERVICE LIMIT
19.980 mm (.7866 in)
CONNECTING ROD SMALL END DIAMETER
NEW MINIMUM
20.010 mm (.7878 in)
NEW MAXIMUM
20.020 mm (.7881 in)
SERVICE LIMIT
20.060 mm (.7898 in)
A
R400motr30A
1
R400motr98A
A
2
R400motr99A
1
Содержание M-50 x 4
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