Isuzu A-4BG1T - Piston and Piston Ring Inspection

ENGINE ASSEMBLY II 4-17
.
.
lsl
.
PISTON AND PISTON 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.
Do this 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
4BGl mm (in)
- ~~
I
Standard
I
Limit
I
~~-
1st Compression 0.085-O. 110 0.20
(0.0033-0.0043) (0.0079)
I
2nd Compression 0.030-0.055
0.15
Ring (0.0018-0.0022) (0.0059)
I
Oil Ring
0.030-0.070 0.15
(0.0018-0.0027)
(0.0059)
4BGlT mm (in)
Standard
Limit
I
1st Compression 0.105-0.130
0.20
Ring (0.0041-0.0051)
(0.0079)
I
2nd Compression 0.050-0.075
0.15
Ring (0.002&0.0029)
(0.0059)
I
I
Oil Ring
0.030-0.070
0.15
(0.0012-0.0027)
(0.0059)
I
6BGl
mm (in)
I-
I Standard 1
Limit
I
I
1st Compression
0.105-0.130
0.20
Ring (0.0041-0.0051)
(0.0079)
I
I
2nd Compression 0.030-0.065
0.15
Ring (0.0012-0.0026) (0.0059)
Oil Ring
0.030-0.070
0.15 -
(0.0012-0.0027)
(0.0059)
6BGlT
mm (in)
1 Standard 1
Limit
I
1st Compression
Ring
0.085-0.120
0.20
(0.0033-0.0047)
(0.0079)
Oil Ring
0.030-0.070
0.15
(0.0012-0.0027)
(0.0059)