Contents: General characteristics ↧ Cylinder block ↧ Piston ↧ Piston rings ↧ Piston pin ↧ Camshaft ↧ Oil pump ↧ Crankshaft ↧ Valve mechanism ↧
General characteristics
| Characteristic | Meaning |
| Number of cylinders | 4 |
| Type | in-line |
| Working volume | 1,598 l |
| Cylinder diameter | 79.0 mm |
| Piston stroke | 81.5 mm |
| Compression ratio | 9,5:1 |
| Cylinder firing order | 1-3-4-2 |
| Maximum power | 78 kW at 6000 rpm |
| Maximum torque | 142 Nm at 4000 rpm |
| Power supply system | Distributed injection system, manufacturer: Siemens or Kemsco |
| Fuel | Unleaded gasoline with an octane rating of at least 91 |
| Spark plug type | NGK, BKR6E-11 |
| Spark plug electrode gap | 1.0-1.1 mm |
Cylinder block
| Characteristic | Meaning |
| Cylinder diameter | 79.0 mm |
| Deviations from circular shape (max) | 0.0065 mm |
| Taper (max) | 0.07 mm |
Piston
| Characteristic | Meaning |
| Diameter | 78.97 mm |
| Clearance between piston and cylinder wall | 0.03 mm |
Piston rings
| Compression, gap in the joint | Top | 0.15-0.3 mm |
| 2nd compression | 0.3-0.5 mm | |
| Axial clearance in piston ring groove | Top | 0.05-0.09 mm |
| 2nd compression | 0.06-0.1 mm |
Piston pin
| Diameter | 18,000 mm |
| Finger displacement | 0.5-0.7 mm |
Camshaft
| Lifting the intake cams | 7.2 mm | |
| Lifting the exhaust cams | 7.2 mm | |
| End runout | 0.1-0.25 mm | |
| Camshaft journal outer diameter | №1 | 29.935-29.95 mm |
| №2 | 26.935-26.95 mm | |
| №3 | 26.935-26.95 mm | |
| №4 | 26.935-26.95 mm | |
| №5 | 26.935-26.95 mm | |
| Bearing outer diameter | №1 | 30.0-30.021 mm |
| №2 | 27.0-27.021 mm | |
| №3 | 27.0-27.021 mm | |
| №4 | 27.0-27.021 mm | |
| №5 | 27.0-27.021 mm |
Oil pump
| Clearance between oil pump housing and outer rotor | 0.400-0.484 mm |
| Outer rotor side clearance | 0.045-0.100 mm |
| Inner rotor side clearance | 0.035-0.085 mm |
| Free length of valve spring | 81 mm |
Crankshaft
Neck of the root
| Diameter | 55 mm |
| Taper (max) | 0.005 mm |
| Deviation from roundness (max) | 0.004 mm |
| Main bearing clearance | 0.026-0.042 mm |
| Crankshaft end runout | 0.1 mm |
Crank pin
| Diameter | 43 mm |
| Taper (max) | 0.005 mm |
| Deviation from roundness (max) | 0.004 mm |
| Connecting rod bearing clearance | 0.019-0.070 mm |
| Connecting rod side clearance | 0.070-0.242 mm |
Valve mechanism
[The article is reprinted from the website: ChevyMan.ru]