Total information
Type - 4-cylinder 4-stroke in-line engines with overhead camshaft and compression ignition of the mixture. Transverse mounting with 30°back rotation. The gearbox is located on the left side of the engine.
Designation:
- 305 1.7L - XUD 7
- 305 1.9L - XUD 9
Number of cylinders - 4
Additional designations:
- 1.7 l (without turbo) — XUD7
- 1.7 l (turbo) — XUD7T/L
- 1.9 l (without turbo) — XUD9
- 1.9 l (turbo) — XUD9T
Bore and stroke:
- 1.7 l - 80.0 x 88.0 mm
- 1.9 l - 83.0 x 88.0 mm
Compression ratio:
- 1.7 l - 23
- 1.9 l - 23
Compression pressure (when turning the crankshaft on a hot engine):
- Minimum - 18 bar
- Normal - 25-30 bar
Maximum pressure difference between any two cylinders is 5 bar
Working volume:
- 1.7 l - 1769 cm3
- 1.9 l - 1905 cm3
Max Torque (ISO):
- 1.7 l 110 Nm at 2200 rpm
- 1.9 l 118 Nm at 2000 rpm
Max Power (ISO):
- 1.7 l 43.5 kW at 4600 rpm
- 1.9 l 47.0 kW at 4600 rpm
Maximum rotation speed:
- No load - 5100 rpm
- Under load - 4600 rpm
The order of operation of the cylinders is 1-3-4-2 (cylinder No. 1 on the flywheel side)
Cylinder block
Cylinder diameter:
- 1.7 L - 80.000-80.018 mm or 80.30-80.048 mm
- 1.9 L - 83.000-83.018 mm or 83.30-83.048 mm
Pistons and piston rings
Piston diameter:
- 1.7 l - 79.93±0.008 mm or 79.96±0.008 mm
- 1.9 l - 82.930±0.009 mm or 82.960±0.009 mm
Piston ring gaps (installed on the piston):
- Upper compression - 0.20-0.40 mm
- Second compression - 0.15-0.35 mm
- Oil scraper - 0.10-0.30 mm
The inner diameter of the bushing of the upper head of the connecting rod is 25.007-25.020 mm
Maximum weight difference between any two pistons 2.5g
Maximum difference in protrusion between any two pistons is 0.12mm
Crankshaft
Axial movement - 0.07-0.32 mm
Diameter of main journals:
- Standard - 60.0 +0/-0.019 mm
- Repair size - 0.3 mm
Crankpin diameter:
- Standard - 50.0 +0/-0.016 mm
- Repair size - 0.3 mm
The maximum ovality of the main / connecting rod journals is 0.007 mm
Cylinder head
Ultimate deformation - 0.07 mm (depending on whether the camshaft can turn freely)
Limiting degree of grinding (see text) - 0.40 mm
The amount of protrusion of the vortex chamber - 0-0.03 mm
Maximum cylinder head bolt length (Togh-type bolts - see text):
- All engines except XUD9TE/L - 121.5mm
- XUD9TE/L - 146.8mm
Valves
Valve seat angle:
- Inlet valves, until October 1986 - 120°
- Inlet valves, from October 1986 - 90°
- Exhaust valves, all models - 90°
Depth of recessed valve heads relative to the surface of the cylinder head:
- Inlet valves - 0.50-1.05 mm
- Exhaust valves - 0.90-1.45 mm
valve clearances (cold engine):
- Inlet valves - 0.15 + 0.08 mm
- Exhaust valves - 0.30 + 0.08 mm
Valve timing (with a gap of 1.0 mm):
- The inlet valve opens - 8°to w.m.t.
- The inlet valve closes - 40°after N.m.t.
- The exhaust valve opens - 56°BC.
- Exhaust valve closes - 12°after TDC
Valve stem diameter:
- Inlet valves - 8.005 mm
- Exhaust valves - 7.986 mm
Valve head diameter:
- Intake valves, before October 1986 - 56.0 mm
- Intake valves, after October 1986 - 38.5 mm
- Exhaust Valves, All Models - 33.0mm
Camshaft
Axial movement - 0.07-0.16 mm
Lubrication system
Lubricant type/specification - Multipurpose motor oil, viscosity SAE 15W/40, acc. API SG/CD specifications (Duckhams Diesel QXR, QS, Hypergrade Plus or Hypergrade)
Lubrication system capacity (when changing oil) - 4.5 l plus 0.5 l per filter
The amount of oil included between the minimum and maximum marks on the dipstick - 1.5 liters
Oil pressure (at engine temperature 80°C):
- Minimum - 2.0 bar at 800 rpm
- Maximum - 3.5-5.0 bar at 4000 rpm
Oil pressure switch actuation pressure:
- Relay turns on - 0.58-0.44 bar
- Relay turns off - 0.8 bar (maximum)
Oil filter type - Champion F104
Oil pump
Type - With two gears
Relief valve opening pressure - 4.0 bar
Axial clearance of gears - 0.12 mm
Circumferential clearance between gears and pump housing - 0.064 mm
Torque (N·m)
- Camshaft bearing caps - 18
- Connecting rod bearing caps:
- Stage 1 - 40
- Loosen, then step 2 - 20
- Stage 3 - Pull up at an angle of 70
- Oil line plug - 28
- Main bearing caps - 70
- Front crankcase - 11
- Oil pump cover - 9
- Oil pump mount - 13
- Pallet - 19
- Flywheel - 50
- Cylinder head bolts (until September 1986):
- Stage 1 - 30
- Stage 2 - 60
- Step 3: loosen 1/4 turn and then - 60
- Stage 4: (after 10 minutes of engine operation at 3000 rpm).
- Loosen 1/4 turn and then - 70
- Cylinder head bolts (since September 1986):
- Stage 1 - 30
- Stage 2 - 70
- Stage 3 - Tighten another 120°
- Cylinder head bolts (type Togh - see text):
- Stage 1 - 20
- Stage 2 - 60
- Stage 3:
- All motors except XUD9TE/L - Tighten 180°
- XUD9TE/L - Pull up 220°
- Bracket injection pump - 20
- Camshaft sprocket - 35
- The lower casing of the gas distribution mechanism - 12
- Crankshaft Pulley Bolt:
- Stage 1 - 40
- Step 2 - Tighten another 60°or to 150 Nm
- Oil pressure switch - 30
- Valve cover - 2
- Fastening the pump pulley to the camshaft - 35
- Oil cooler - 68
- Sump drain tube bracket - 3
- Oil filter - 14
- Left engine mount:
- Central nut - 35
- Small nuts - 18
- Fastening the central stud to the gearbox - 50
- Right lower engine support bracket - 18
- Right upper engine support bracket:
- Engine mount - 35
- Mounting to the support elastic - 28
- Lower Link Mount - 35
- Timing belt tensioner - 18
- Timing belt intermediate roller - 18
- Fastening the right engine support rubber to the machine body - 40