General information of the V6 engine
Type - Six-cylinder, four-stroke engine
Number of camshafts - Two overhead camshafts
Number of valves: - 12, vertical arrangement. The valve clearance is regulated by a control chain drive leading from the crankshaft to the intermediate wheel, and then a two-row chain drive leading from the chain sprocket to both crankshaft halls. With hydraulic chain tensioner
Engine designations - AAA
Cylinder capacity - 2.8 liters
Power - 128 kW (174 hp) at 5800 rpm
Maximum torque - 235 Nm at 4200 rpm
Cylinder diameter - 81.0 mm
Stroke - 90.3 mm
Compression ratio 10:1
Built-in injection system - "Bosch"-"Motronic"
Fuel - Lead free, minimum 95 octane
The firing order of the cylinders is 1-5-3-6-2-4
Lambda adjusting device - Yes
Catalyst - Yes
Oil pressure:
- minimum 1 kgf/cm2
- maximum 7 kgf/cm2
Mechanical
Cylindrical holes
- Nominal diameter - 81.01 mm
- The first overall dimension is 81.51 mm
- Second overall dimension - 82.01 mm
Cylinder head and valves
Valve guides:
- Mounting Temperature - Cylinder Head Cold
- The inner diameter of the guides - 7.013-7.035 mm
- Valve stem clearance:
- inlet - 1.0 mm
- graduation - 1.3 mm
Valve seats:
- Valve seat diameter:
- intake - 38.30 mm
- graduation - 33.50 mm
- Seat angle - 45°
- Valve seat width:
- intake max. - 1.7 mm
- graduation max. - 2.0 mm
- Upper Correction Angle - 30°
- Lower Correction Angle - 75°
- Maximum allowable finishing depth:
- intake - 33.90 mm
- graduation - 34.10 mm
Valves:
- Valve disc diameter:
- inlet - 39.00 mm
- graduation - 34.20 mm
- Valve length:
- intake - 106.25 mm
- graduation - 106.95 mm
- Valve stem diameter:
- intake - 6.97 mm
- graduation - 6.95 mm
- Valve Edge Thickness - Minimum 0.5mm
Pistons and connecting rods
Piston diameter:
- nominal diameter - 80.985 mm
- the first oversized dimension is 81.485 mm
- the second oversized dimension is 81.985 mm
Piston diameter measuring point — At a distance of 6 mm from the lower edge of the piston at an angle of 90°to the axis of the piston pin
The maximum allowable wear of the piston is 0.04 mm from the given diameter
Piston working clearance:
- normal - 0.03 mm
- wear limit - 0.07 mm
Piston rings:
- Number of rings - 3
- Vertical clearance of rings in piston grooves:
- normal - o-rings - 0.02-0.07 mm
- normal - oil flinger - 0.02-0.08 mm
- wear limit - 0.15 mm
- Butt gap:
- normal - O-rings - 0.20-0.40 mm
- normal - oil scraper rings - 0.25-0.50 mm
- wear limit - 1.0 mm
Connecting rods:
- Axial clearance of the bearing - 0.05-0.31 mm
- wear limit - 0.37 mm
Direction of installation of connecting rods - The casting marks on the leg of the connecting rod and the connecting rod bearing cap must be facing towards the vibration damper of the crankshaft
Piston pin working clearance - 0.01-0.620 mm
Crank length - 164.0 mm
Crankshaft
Number of main bearings - 7
Type - With 12 swing weights and vibration dampers
Main bearing markings - 1 to 7, starting at the front of the engine (from the side of the vibration damper)
Perception of axial pressure - Thrust washers
Execution of main-rod bearings - Thin-walled bearing shells
Axial clearance of the crankshaft:
- normal - 0.07-0.17 mm
- wear limit - 0.25 mm
Operating clearance of main bearings:
- normal - 0.02-0.06 mm
- wear limit - 0.10 mm
Working clearance of connecting rod bearings:
- normal - 0.01-0.06 mm
- wear limit - 0.10 mm
Main bearing journal diameter:
- nominal diameter - 60.00 mm
- the first oversized size is 59.75 mm
- second oversized size - 59.50 mm
- third oversized size - 59.25 mm
Crankpin Diameter:
- nominal diameter - 54.00 mm
- the first oversized size is 53.73 mm
- the second oversized dimension is 53.50 mm
- third oversized size - 53.25 mm
Grinding tolerances - -0.022 to -0.042 mm
Engine lubrication system VR6
Pressure in the lubrication system - 1.0 kgf / cm2
Maximum oil pressure - 7 kgf / cm2
Engine oil capacity:
- with filter change - 6.0 l
- without filter replacement - 5.0 l
Oil Filter - Filter Insert in Filter Housing
VR6 engine cooling system
Type - Thermosiphon unit with vane water pump. Thermostatic control, with separate expansion tank. The electric fan is turned on and off by a switch located in the radiator. The second fan is driven by a V-belt from an electric fan.
The amount of liquid filling the cooling system - 10 l
Antifreeze - VW "G 11"
Thermostat opening temperature - 85°С
Thermostat fully open - 105°C
Injection system "Motronic" VR6 engine
Idle speed (not regulated) - 660-740 rpm
CO content (not regulated) — 0,3-1,2%
2L engine injection system
Embedded system - Multi-position injection unit combined with an ignition system. The common control unit electronically regulates the injection and ignition system. Includes system of registration of failures in work and self-diagnostics.
Idle speed (not regulated) - 770-870 rpm
CO content (not regulated) — 0,2-1,2%
2L engine ignition system
Type - Ignition timing, spark generation, etc. electronically controlled simultaneously with the regulation of the injection system.
Ignition timing (not regulated) - 4-8°before TDC
The order of operation of the cylinders is 1-3-4-2
Spark plug - "Bosh" "Beru" "Champion"
Type - 7DTC 14-7DTU N7 BYC
The distance between the electrodes is 0.7-0.9 mm
Spark plug tightening torque - 25 Nm
VR6 engine ignition system
Type - Electronic installation, works together with the injection system as a common part of the engine electronics.
The moment of ignition is 6.0-7.5°before TDC. Can only be accurately determined with special tools Ignition control Automatic ignition timing control "Motronic".
The firing order of the cylinders is 1-3-5-6-2-4
Spark plug:
- Company marking "Volkswagen" — 101 000 025 AA
- Manufacturer's mark - C9 MMC
- The distance between the electrodes is 0.7-0.9 mm
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