Engine codes
See Section 1A.
Cylinder head
Cylinder head seat, maximum deflection:
- Diesel engines - 0.2 mm
Minimum cylinder head height:
- Diesel engines - Cylinder head regrinding not possible
Selecting a gasket for the cylinder head (diesel engines NC, CN and DE):
- The piston protrudes from the cylinder by 0.91-1.00 mm - 1 notch / hole
- Piston protrudes 1.01-1.10 mm - 2 notches/holes
- Piston protrudes 1.11-1.20 mm - 3 notches/holes
Selecting a gasket for the cylinder head (diesel engine 3D):
- The piston protrudes from the cylinder by 0.66-0.86 mm - 1 notch / hole (thickness 1.53 mm)
- Piston protrudes 1.01-1.10 mm - 2 notches/holes (thickness 1.57 mm)
- Piston protrudes 1.11-1.20 mm - 3 notches/holes (thickness 1.61 mm)
Selecting a gasket for the cylinder head (diesel engine 1T):
- The piston protrudes from the cylinder by 0.76-1.01 mm - 1 notch / hole (thickness 1.53 mm)
- Piston protrudes 1.02-1.05 mm - 2 notches/holes (thickness 1.57 mm)
- Piston protrudes 1.06-1.13 mm - 3 notches/holes (thickness 1.61 mm)
Distance from the center of the valve stem to the surface of the cylinder head (minimum):
Diesel engines:
- Inlet valve - 35.8 mm
- Exhaust valve - 36.1 mm
Pistons and piston rings
Piston diameter:
Diesel engines CN, NC and DE:
- Nominal - 79.170 mm
- 1st repair - 79.720 mm
- 2nd repair - 79.970 mm
- Maximum deviation - 0.04 mm
Diesel Engine 3D:
- Nominal - 79.480 mm
- 1st repair - 79.730 mm
- 2nd repair - 79.980 mm
- Maximum deviation - 0.04 mm
Diesel engine 1T:
- Nominal - 80.960 mm
- 1st repair - 81.210 mm
- Maximum deviation - 0.04 mm
Gap between piston ring and groove wall:
Diesel engines CN, NC and DE:
New rings:
- Top compression - 0.06 - 0.09 mm
- Second compression - 0.05 - 0.08 mm
- Oil scraper - 0.03 - 0.06 mm
Wear limit:
- Compression rings - 0.25 mm
- Oil scraper ring - 0.15 mm
Diesel Engine 3D:
New rings:
- Top compression - 0.09 - 0.12 mm
- Second compression - 0.05 - 0.08 mm
- Oil scraper - 0.03 - 0.06 mm
Wear Limit:
- Compression rings - 0.25 mm
- Oil scraper ring - 0.15 mm
Diesel engine 1T:
New rings:
- Top compression - 0.07 - 0.105 mm
- Second compression - 0.05 - 0.075 mm
- Oil scraper - 0.03 - 0.065 mm
Wear Limit:
- Compression rings - 0.25 mm
- Oil scraper ring - 0.15 mm
Piston ring lock clearance (15 mm from the base of the cylinder):
Diesel engines CN, NC and DE:
New rings:
- Compression - 0.20 - 0.40 mm
- Oil scraper - 0.25 - 0.50 mm
- Wear limit - 1.0 mm
Diesel Engine 3D:
New rings:
- Compression - 0.20 - 0.40 mm
- Oil scraper - 0.25 - 0.50 mm
Wear Limit:
- Top compression ring - 1.20 mm
- Second compression ring - 0.60 mm
- Oil scraper ring - 1.20 mm
Diesel engine 1T:
New rings:
- Top compression - 0.25 - 0.45 mm
- Lower compression - 0.20 - 0.40 mm
- Oil scraper - 0.25 - 0.50 mm
- Wear limit - 1.00 mm
Valves
Valve stem diameter:
- Inlet valve - 7.97 mm
- Exhaust Valve - 7.95mm
Maximum valve head displacement:
- Inlet valve - 1.3 mm
- Exhaust valve - 1.3 mm
Camshaft
Maximum axial clearance - 0.15 mm
Maximum runout, all motors - 0.01 mm
Maximum operating clearance, all motors - 0.10 mm
Cylinder block
Cylinder diameter:
- Engines CN, DE, NC - 76.5
- 3D Engines - 79.5mm
- Engines 1T - 81.0 mm
Maximum cylinder wear:
- CN, DE, NC motors - 0.10 mm
- 3D Engines - 0.08mm
Engines 1T:
- Nominal - 81.01 mm
- 1st repair - 81.26 mm
Maximum cylinder wear - 0.08 mm
Connecting rods
Lateral clearance of the lower head of the connecting rod (maximum) — 0.4 mm
Crankshaft
Depth of installation of the needle bearing — 1.5 mm
Axial clearance:
- Nominal - 0.07 - 0.18 mm
- Wear limit - 0.25 mm
The maximum operating clearance of the main bearing is 0.16 mm
Main bearing journal diameter:
- Nominal size - 58.00 mm-0.022-0.042
- 1st repair - 57.75 mm-0.022-0.042
- 2nd repair - 57.50 mm-0.022-0.042
- 3rd repair - 57.25 mm-0.022-0.042
Connecting rod journal diameter:
All engines:
- Nominal size - 47.80 mm-0.022-0.042
- 1st repair - 47.55 mm-0.022-0.042
- 2nd repair - 47.30 mm-0.022-0.042
- 3rd repair - 47.05 mm-0.022-0.042
Maximum neck ovality - 0.03 mm
Tightening torques - See Section 1A.
Visitor comments