Pistons, matching and dimensions - RA03001193165X(03-3165)
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Cylinder identification and piston identifications must agree (see arrows).
NOTE:
The group classification has been converted from numerals to letters and reduced to three stages.
The pistons with numerals may be installed in a crankcase with a letter grouping, but not vice versa (see table).
When performing repairs, all the cylinder bores should be honed to the dimensions of the existing pistons plus piston play, see "Measuring, honing and silicone-lapping cylinder bores" (01-1120)
.
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. NUMERICAL AND LETTER GROUPING
| Numerical piston identification |
equals |
Letter piston identification |
|
Letter cylinder identification |
| 0 |
→ |
A |
→ |
A |
| 0+ 1 |
→ |
B |
→ |
B |
| 1+ 2 |
→ |
C |
→ |
C |
TEST DATA
| Engine |
119.96 |
119.97 |
119.98 |
| Piston clearance |
0.004-0.026 |
0.004-0.026 |
0.004-0.026 |
| Difference in weight of pistons within an engine |
8 g |
8 g |
8 g |
| Piston pin Ø |
25.995-26.000 |
24.000 |
24.000 |
| Piston pin clearance in piston |
0.004-0.008 |
0.004-0.008 |
0.004-0.008 |
MATCHING PISTONS TO CRANKCASE WITH NUMERICAL IDENTIFICATION
| Engine 119.960/970/972/974 |
Class identification |
Index |
Piston Ø |
Cylinder Ø |
| |
0 |
52 |
96.483-96.493 |
96.498-96.503 |
| |
0+ |
53 |
96.488-96.498 |
96.503-96.508 |
| Standard size Std 96.5 Ø |
1 |
54 |
96.493-96.503 |
96.508-96.513 |
| |
1+ |
55 |
96.498-96.508 |
96.513-96.518 |
| |
2 |
56 |
96.503-96.513 |
96.518-96.523 |
| |
0 |
|
96.983-96.993 |
96.998-97.003 |
| 1st repair size+0.5 |
1 |
|
96.993-97.003 |
97.008-97.013 |
| |
2 |
|
97.003-97.013 |
97.018-97.023 |
| |
0 |
|
97.483-97.493 |
97.498-97.503 |
| 2nd repair size +1.0 |
1 |
|
97.493-97.503 |
97.508-97.513 |
| |
2 |
|
97.503-97.513 |
97.518-97.523 |
MATCHING PISTONS TO CRANKCASE WITH LETTER IDENTIFICATION
| Engine 119.980/982/970/972/974 |
Group identification |
Index |
Piston Ø |
Cylinder Ø |
| |
A |
52 |
96.482-96.495 |
96.500-96.508 |
| Standard size Std 96.5 Ø |
B |
54 |
96.491-96.504 |
96.508-96.516 |
| |
C |
56 |
96.499-96.512 |
96.516-96.524 |
| |
A |
|
96.982-96.995 |
97.000-97.008 |
| 1st repair size+0.52) |
B |
|
96.991-97.004 |
97.008-97.016 |
| |
C |
96.999-97.012 |
|
97.016-97.024 |
| |
A |
|
97.482-97.495 |
97.000-97.508 |
| 2nd repair size+1.02) |
B |
|
97.491-97.504 |
97.508-97.516 |
| |
C |
|
97.499-97.512 |
97.516-97.524 |
MATCHING PISTONS TO CRANKCASE WITH NUMERICAL IDENTIFICATION
| Engine 119.971/975/981/985 |
Group identification |
Index |
Piston Ø |
Cylinder Ø |
| |
0 |
52 |
91.983-91.993 |
91.998-92.003 |
| |
0+ |
53 |
91.988-91.998 |
92.003-92.008 |
| Standard size Std 92.0 Ø |
1 |
54 |
91.993-92.003 |
92.008-92.013 |
| |
1+ |
55 |
91.998-92.008 |
92.013-92.018 |
| |
2 |
56 |
92.003-92.013 |
92.018-92.023 |
| |
0 |
|
92.483-92.493 |
92.498-92.503 |
| 1st repair size+0.5 2) |
1 |
|
92.493-92.503 |
92.508-92.513 |
| |
2 |
|
92.503-92.513 |
92.518-92.523 |
| |
0 |
|
92.983-92.993 |
92.998-93.003 |
| 2nd repair size+1.0 2) |
1 |
|
92.993-93.003 |
93.008-93.013 |
| |
2 |
|
93.003-93.013 |
93.018-93.023 |
MATCHING PISTONS TO CRANKCASE WITH LETTER IDENTIFICATION
| Engine 119.971/975/981/985 |
Group identification |
Index |
Piston Ø |
Cylinder Ø |
| |
A |
52 |
91.982-91.995 |
92.000-92.008 |
| Standard size Std 92.0 Ø |
B |
54 |
91.991-92.004 |
92.008-92.016 |
| |
C |
56 |
91.999-92.012 |
92.016-92.024 |
| |
A |
|
92.482-92.495 |
92.500-92.508 |
| 1st repair size+0.5 2) |
B |
|
92.491-92.504 |
92.508-92.516 |
| |
C |
|
92.499-92.512 |
92.516-92.524 |
| |
A |
|
92.982-92.995 |
93.000-93.008 |
| 2nd repair size+1.0 2) |
B |
|
92.991-93.004 |
93.008-93.016 |
| |
C |
|
92.999-93.012 |
93.016-93.024 |