The design of the ZIL-131 engine

Engine 3IL-131 V-shaped, eight-cylinder, four-stroke, carburetor, with liquid cooling

Engine ZIL-5081.10: 1 - Engine crankcase oil receiver; 2. Engine oil sump; 3. Crankshaft; 4. Main bearing cap; 5. Oil pump; 6. Channel in the block for taking oil into the pump; 7. Oil pump drive shaft; 8. Coolant drain cock; 9. Piston with piston rings; 10. Engine cylinder block; 11. Exhaust manifold; 12. Exhaust manifold pipe; 13. Exhaust manifold pipe fastening clamp; 14. Combustion chamber; 15. Cylinder head; 16. Exhaust valve; 17. Guide sleeve; 18. Valve spring; 19. Valve rocker arm; 20. Valve rocker arm shaft; 21. Oil pump and ignition system sensor drive gear; 22. Intake manifold and oil separator of the engine crankcase ventilation system; 23. Ignition distributor drive housing; 24. Intake manifold water jacket; 25. Engine speed limiter actuator; 26. Centrifugal oil filter; 27. Carburetor; 28. Fine fuel filter; 29. Ignition distributor; 30. Shielded spark plug wire casing; 31. Oil level indicator; 32. Cylinder head cover; 33. Shielded wire collector; 34. Valve spring plate; 35. Intake valve cuffs; 36. Intake valve; 37. Push rod; 38. Shielded spark plug; 39. Engine cooling system water jacket; 40. Cylinder head gasket; 41. Piston pin; 42. Electric starter; 43. Connecting rod; 44. Flywheel and clutch housing; 45. Lower cover of the flywheel and clutch housing; 46. Lower connecting rod head cover.

The engine is attached to the frame at three points.

The front engine support is a bracket installed under the timing gear cover; The rear supports are the clutch housing legs.

Round rubber cushions are installed between the bracket and the front cross member of the frame, as well as between the clutch housing legs and the rear engine mounting brackets.

Longitudinal section of the engine 3IL-5081.10: 1 - crankshaft pulley; 2 - ratchet; 3 - cylinder block; 4 - ignition timing indicator; 5 - speed limiter sensor; 6 - limiter sensor drive shaft; 7 - shaft pressure spring; 8 - spacer ring; 9 thrust flange; 10 camshaft drive timing gear cover; 11 - liquid pump; 12 - liquid pump pulley; 13 - alternator drive belt; 14 - power steering pump drive belt; 15 - compressor drive belt; 16 - plug; 17 - oil can; 18 - eye bolt; 19 crankcase ventilation pipe and oil filler neck; 20 - fuel pump; 21 - fuel pump rod; 22 fine fuel filter; 23 - ventilation system valve tube; 24 centrifugal oil filter (centrifuge); 25 - engine cooling system temperature gauge sensor; 26 - camshaft; 27 - main bearing shell; 28 - rear main bearing seal; 29 clutch housing; 30 - crankshaft; 31 - thrust washer; 32 - camshaft drive gear

The front and rear suspension cushions are interchangeable.

In addition, the engine is connected to the front cross member of the frame using a jet rod with rubber shock absorbers.

The jet rod is designed to keep the engine from longitudinal movement when the clutch is disengaged, the transfer case is engaged, or when the car is braking.

Engine suspension: (a) - front support; (b) - rear support: 1 - traction buffer; 2 - connecting rod; 3 - front engine support bracket; 4 - front engine support bolt; 5 - lower front support cushion; 6 - protective cap of upper front engine support cushions; 7 - engine mounting bolt; 8 - rear support bolt; 9 - rear support cushion pad; 10 - upper rear support cushion; 11 - lower rear support cushion; 12 - rear support bolt

The engine mount is shown in Fig. 4

At the intervals specified in the "Vehicle Maintenance" section, it is necessary to check the tightening of the nuts of the front and rear engine mount bolts, as well as check the fastening of the jet rod.

The tightening torque of the nuts of bolts 8 of the rear suspension should be equal to 20-25 kgm, and the nuts of bolts 4 and 12 of the front and rear suspensions, respectively, 8-10 kgm.