Engine Block (J37A4)
ENGINE BLOCK (J37A4) STANDARDS AND SERVICE LIMITS
| Item | Measurement | Qualification | Standard or New | Service Limit |
|---|---|---|---|---|
| Block | Warpage of deck | 0.07 mm (0.003 in) max. | 0.10 mm (0.004 in) | |
| Bore diameter | 90.000-90.015 mm (3.5433-3.5439 in) | 90.065 mm (3.5459 in) | ||
| Bore taper | Difference between first and third measurement | - | 0.05 mm (0.002 in) | |
| Piston | Skirt O.D. at 16.0 mm (0.63 in) from bottom of skirt | 89.983-89.996 mm (3.5426-3.5431 in) | 89.975 mm (3.5423 in) | |
| Clearance in cylinder | 0.004-0.032 mm (0.0002-0.0013 in) | 0.070 mm (0.0028 in) | ||
| Piston ring | Ring-to-groove clearance | Top | 0.055-0.085 mm (0.0022-0.0033 in) | 0.15 mm (0.006 in) |
| Second | 0.030-0.060 mm (0.0012-0.0024 in) | 0.13 mm (0.005 in) | ||
| Ring end gap | Top | 0.30-0.40 mm (0.012-0.016 in) | 0.60 mm (0.024 in) | |
| Second | 0.40-0.55 mm (0.016-0.022 in) | 0.70 mm (0.028 in) | ||
| Oil | 0.20-0.35 mm (0.008-0.014 in) | 0.45 mm (0.018 in) | ||
| Piston pin | O.D. | 21.962-21.965 mm (0.8646-0.8648 in) | 21.954 mm (0.8643 in) | |
| Pin-to-piston clearance | -0.005-0.003 mm (-0.0002-0.0001 in) | 0.004 mm (0.0002 in) | ||
| Connecting rod | Pin-to-rod clearance | 0.005-0.014 mm (0.0002-0.0006 in) | 0.019 mm (0.0007 in) | |
| Small end bore diameter | 21.970-21.976 mm (0.8650-0.8652 in) | - | ||
| Big end bore diameter | 60.0 mm (2.36 in) | - | ||
| End play | 0.15-0.35 mm (0.006-0.014 in) | 0.45 mm (0.018 in) | ||
| Crankshaft | Main journal diameter | 71.976-72.000 mm (2.8337-2.8346 in) | - | |
| Rod journal diameter | 56.976-57.000 mm (2.2431-2.2441 in) | - | ||
| Rod/main journal taper | 0.005 mm (0.0002 in) max. | 0.010 mm (0.0004 in) | ||
| Rod/main journal out-of-round | 0.005 mm (0.0002 in) max. | 0.010 mm (0.0004 in) | ||
| End play | 0.10-0.35 mm (0.004-0.014 in) | 0.45 mm (0.018 in) | ||
| Total runout | 0.025 mm (0.0010 in) max. | 0.030 mm (0.0012 in) | ||
| Crankshaft bearing | Main bearing-to-journal oil clearance | 0.019-0.045 mm (0.0007-0.0018 in) | 0.050 mm (0.0020 in) | |
| Connecting rod bearing-to-journal oil clearance | 0.020-0.044 mm (0.0008-0.0017 in) | 0.050 mm (0.0020 in) |