Inspection And Repair 6A-54 - Isuzu 1999 RODEO Workshop Manual

6A–54 ENGINE MECHANICAL (X22SE 2.2L)
7. Remove piston and connecting rod assembly (7).
NOTE: Before removing piston and connecting rod
assembly, measure thrust clearance.
f Remove any ridge or carbon build up from the top
end of the cylinder.
8. Remove the piston rings (8) with a piston ring
expander. Arrange the removed piston rings in the
cylinder number order.
9. Remove the piston pin (9).
f Heat the connecting rod and the piston pin with oil
heater, when it
280°C–320°C.
f Push the piston pin with brass bar.
NOTE: Keep the parts removed from each cylinder
separate. All parts must be reinstalled in their original
positions.
10. Piston (10).
11. Connecting rod (11).
Inspection and Repair
Pistons (10)
Carefully clean away all the carbon adhering to the piston
head and the piston ring grooves.
NOTE: Never use a wire brush to clean the pistons.
Damage will result. Visually check each piston for
cracking, scoring, and other signs of excessive wear. If
any of the above conditions are found, the piston must be
replaced.
015RW024
temperature is keep
Piston Rings (8)
Any worn or damaged part discovered during engine
overhaul must be replaced with a new one.
1. Ring end gap measurement
f Insert the piston ring into the bore.
f Push the ring by the piston, at a right angle to the
wall, into the point at which the cylinder bore
diameter is the smallest.
f Measure the ring end gap.
Compression Ring
1st ring
Standard: 0.30 mm–0.50 mm
(0.0118 in–0.0195 in)
2nd ring
Standard:
0.30 mm–0.50 mm
(0.0118 in–0.0195 in)
Oil ring
Standard: 0.40 mm–1.40 mm
(0.0156 in–0.0546 in)
2. Measure the clearance between the piston ring
groove and the piston ring with a feeler gauge. If the
piston ring groove / piston ring clearance exceeds the
specified limit, the piston must be replaced.
Compression Ring Clearance
at
Standard : 0.02 mm–0.04 mm
(0.0008 in.–0.0016 in)
015RW025