Piston Ring And Piston Ring Groove Clearance; Piston Ring And Piston Ring Groove - Isuzu A-4JA1 Workshop Manual

ENGINE ASSEMBLY ( 2 )
74
Piston Ring Gap
1 s t Compression Ring
2nd Compression Ring
Oil Ring

Piston Ring and Piston Ring Groove Clearance

Use a feeler gauge to measure the clearance between
the piston ring and the piston ring groove at several
points around the piston.
If the clearance between the piston ring and the piston
ring groove exceeds the specified limit, the piston ring
must be replaced.

Piston Ring and Piston Ring Groove

Clearance
1 s t Compression Ring
2nd Compression Ring
Oil Ring
Visually inspect the piston. If a piston ring groove is
damaged or distorted, the piston must be replaced.
Standard
0.20 – 0.40
(0.008 – 0.016)
0.10 – 0.30
(0.004 – 0.012)
Standard
0.090 – 0.125
(0.0035 – 0.0049)
0.050 – 0.075
(0.002 – 0.003) (0.006)
0.030 – 0.070
(0.0012 – 0.0028)
mm(in)
Limit
1.5
(0.059)
mm(in)
Limit
0.15