Doosan GC25P-3 User Manual

- 148 -vLP Engine G430(3.0L) Base Engine Service Procedure
12. Measure the piston ring side clearance.
(1) Roll the piston ring entirely around its ring
groove on the piston.
(2) Dress the groove with a fine cut file if the ring
groove causes binding.
(3) Replace the piston ring if a distorted piston ring
causes binding.
(4) Use a feeler gauge in order to measure the
side clearance of the piston ring and groove.
(5) Try another piston ring if the side clearance is
too small.
Piston Selection
IMPORTANT: Measurements of all components
should be taken with the components at normal room
temperature.
For proper piston fit, the engine block cylinder bores
must not have excessive wear or taper.
A used piston and pin set may be reinstalled if, after
cleaning and inspection, they are within specifications.
1. Inspect the engine block cylinder bore. Refer to
Cylinder Block Clean and Inspect.
2. Inspect the piston and piston pin. Refer to Piston
and Connecting Rod Clean and Inspect.
3. Use a boring gauge in order to measure the cylinder
bore diameter at a point of 66 mm (2.5 in) from the
top of the cylinder bore.
VE060-3L
VE071-3L
VE070-3L

Doosan GC25P-3 Specifications

General

Brand	Doosan
Model	GC25P-3
Category	Engine
Language	English