Single Overhead Cam Engine Specifications (Opel Vectra A)

Type, all models - 4-cylinder, in-line, water-cooled, transversely mounted at the front of the car. Single overhead camshaft with belt drive, acting on hydraulic valve lifters.

Engine codes:

• 14 NV — 1.4 l. (1389 cm³)
• 16 SV — 1.6 l. (1598 cm³)
• X16SZ - 1.6 l. (1598 cm³)

Ecotec type engines:

• C16 NZ - 1.6 l. (1598 cm³) + catalyst
• C16 NZ2 - 1.6 l. (1598 cm³) + catalyst
• 18 SV — 1.8 l. (1796 cm³)
• C18 NZ - 1.8 l. (1796 cm³) + catalyst
• 20 NE — 2.0 l. (1998 cm³)
• 20SEH — 2.0 l. (1998 cm³) + early SRi
• C20 NE — 2.0 l (1998 cm³) + catalyst

Pistons	Diameter (mm)	Stroke (mm)
14 NV	77.6	73.4
16 SV, C16 SV, C16 NZ and X16 SZ	79.0	81.5
C16NZ2	80.0	79.5
18 SV and C18 NZ	84.8	79.5
20 NE, 20 SEH and C20 NE	86.0	86.0

Compression ratio:

• 14 NV — 9.4:1
• 16 SV, X16 SZ. 18 SV and 20 SEH - 10.0:1
• C16 NZ, C16 NZ2, C18 NZ, 20 NE and C20 NE - 9.2:1

Maximum power:

• 14 NV - 55 kW (75 hp) at 5600 rpm
• 16 SV - 60 kW (82 hp) at 5400 rpm
• X16 SZ - 52 kW (71 hp) at 5000 rpm
• C16 NZ and C16 NZ2 - 55 kW (75 hp) at 5200 rpm
• 18 SV and C18 NZ - 66 kW (90 hp) at 5400 rpm
• 20 NE and C20 NE - 85 kW (116 hp) at 5200 rpm
• 20 SEH - 95 kW (129 hp) at 5600 rpm

Maximum torque:

• 14 NV - 108 Nm at 3000 rpm
• X16 SZ - 128 Nm at 2800 rpm
• 16 SV - 130 Nm at 2600 rpm
• C16 NZ and C16 NZ2 - 125 Nm at 2800 rpm
• 18 SV - 148 Nm at 2800 rpm
• C18 NZ - 145 Nm at 3000 rpm
• 20 NE - 175 Nm at 2600 rpm
• 20 SEH - 180 Nm at 4600 rpm
• C20 NE - 170 Nm at 2600 rpm

The order of operation of the cylinders:

• All models are 1-3-4-2 (cylinder #1 next to the toothed drive belt)

Cylinder block

• Material - Iron
• The maximum permissible ovality of cylinder bores is 0.013 mm
• The maximum permissible taper of the cylinder bores is 0.013 mm
• The maximum permissible cylinder bore size is 0.5 mm

Crankshaft and bearings

• Number of main bearings - 5

Main journal diameter (mm):

• 14 NV, 16 SV, C16 NZ and X16 SZ
• Standard - 54.980-54.997
• Repair size 0.25 mm - 54.730-54.747
• Repair size 0.50 mm - 54.482-54.495
• C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH
• Standard - 57.974-57 995
• Repair size 0.25 mm - 57.732-57.745
• Repair size 0.50 mm - 57.482-57.495

Color marking of main bearing shells	Insert in the lid	Insert in the cylinder block
14 NV, 16SV, C16NZ and X16SZ
Standard	Brown	Green
Repair size 0.25 mm	Brown/blue	Green/blue
Repair size 0.50 mm	Brown/white	Green/white
C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH
Standard	Brown/green/white
Repair size 0.25 mm	Brown/Blue and Green/Blue
Repair size 0.50 mm	Brown/White and Green/White

Width of central (thrust) main journal (mm):

• 14 NV, 16 SV, C16 NZ and X 16 SZ:
• Standard - 26.000-26.052
• Repair size 0.25 mm - 26.200-26.252
• Repair size 0.50 mm - 26.400-26.452
• C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH:
• Standard - 25.950-26.002
• Repair size 0.25 mm - 26.150-26.202
• Repair size 0.50 mm - 26.350-26.402

Crankpin diameter (mm):

• 14 NV, 16 SV, C16 NZ and X16 SZ:
• Standard - 42.971-42.987
• Repair size 0.25 mm - 42.721-42.737
• Repair size 0.50 mm - 42.471-42.487
• C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH:
• Standard - 48.970-48.988
• Repair size 0.25 mm - 48.720-48.738
• Repair size 0.50 mm - 48.470-48.488

Color marking of connecting rod bearing shells (all models):

• Standard - No
• Repair size 0.25 mm - Blue
• Repair size 0.50 mm - White

Ovality of main and connecting rod journals (all models) — 0.04 mm maximum

Permissible movement of main bearing (mm):

• 14 NV, 16 SV, C16 NZ and X16 SZ - 0.017-0.047
• C16 NZ2, 18 SV, C18 NZ. 20 NE, C20 NE and 20 SEH - 0.015-0.040

Allowable movement of connecting rod bearing (mm):

• 14 NV, 16 SV C16 NZ and X16 SZ - 0.019-0.071
• C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH - 0.006-0.031

Crankshaft axial clearance (mm):

• 14 NV, 16 SV, C16 NZ and X16 SZ - 0.1-0.2
• C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH - 0.050-0.152

Lateral play of connecting rod (mm) (all models) — 0.07-0.24



Clearance between piston and cylinder wall (mm) (all models) — 0.02-0.04

Piston rings

Quantity (on piston) (all models) — 2 compression, 1 oil scraper

Ring lock gap (mm):

• Compression - 0.3-0.5
• Oil scraper (upper and lower parts) — 0.4-1.4
• Offset of ring cuts (to the cut of the adjacent ring) — 180°

Cm. Chapter 32 for oil scraper ring.

Cylinder head

Material (all models) - Light alloy

Maximum permissible deformation of the surface under the gasket (all models) — 0.025 mm



Cylinder head height (all models) — 96.00±0.25 mm

Valve seat width (mm):

• 14 NV, 16 SV, C16 NZ, X16 SZ and C16 NZ2:
• Intake - 1.3-1.5
• Graduation - 1.6-1.8
• 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH:
• Etsknoy - 1.0-1.5
• Graduation - 17-2.2

Camshaft

Cam ovality (mm):

• 14 NV (inlet and outlet) — 6.12
• 16 SV and C16 NZ:
• Intake - 5.61
• Graduation - 6.12
• C16 NZ2, 18 SV and C18 NZ:
• Intake - 6.01
• Graduation - 6.39
• 320 NE and 20 NE (inlet and outlet) — 6.67
• 20 SEH (inlet and outlet) — 6.70

Maximum permissible camshaft distortion (mm) (all models) — 0.04

Axial clearance (mm) (all models) — 0.09-0.21

Toothed drive belt (motors without automatic tensioning)

Tensioning using the Opel KM-510-A template (see Chapter 11):

• 14 NV, 16 SV and C16NZ:
• New belt, cold - 5.5
• New belt, warm - 8.0
• Not a new belt, cold - 4.0
• Not a new belt, warm - 7.0
• 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH:
• New belt, cold - 4.5
• New belt, warm - 7.5
• Not a new belt, cold - 2.5
• Not a new belt, warm - 7.0

Valves and guides

Flywheel

Maximum permissible lateral runout of the starter ring gear (all models) — 0.5 mm

Maximum depth of material removed from the friction surface of the clutch during regrinding (all models) — 0.3 mm

Lubrication system

Lubricant Type/Specification - See Lubricants and Fluids in "Weekly checks".

Required amount of grease - See. Specifications in Section 1.

Oil pump clearances:

Clearance between the teeth of the internal and external gears (backlash) (all models) — 0.0-0.2 mm

Clearance between casing and gear (axial clearance):

• 14 NV, 16 SV, C16 NZ and X16 SZ — 0.08-0.15 mm
• C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH - 0.03-0.10 mm

Oil pressure at idle (the engine is warm) (all models) — 1.5 bar

Tightening torques, Nm

Note: Use new bolts where marked (*). Tightening torques for cylinder head bolts apply only to the newest types. Earlier types of bolts may require different tightening torques. Consult your supplier.

Inlet air preheating chamber to the exhaust manifold - 8

Generator and intake manifold to brackets:

• 1.4 and 1.6 liters, (except C16 NZ2) — 20
• C16 NZ2, 1.8 and 2.0 liters - 18

Generator to bracket (M8) - 30

Generator to bracket (M10) - 40

Generator to connecting bracket - 25

Connecting rod bearing cap:*

• 1.4 and 1.6 liters, (except C16 NZ2)
• Stage 1 - 25
• Stage 2 - Turn to 30° angle
• 16 NZ2, 1.8 and 2.0 liters:
• Stage 1 - 35
• Stage 2 - Turn to 45° angle
• Stage 3 - Turn further by 15°

Cover for camshaft housing - 8

Camshaft pulley - 45

Camshaft thrust plate - 8

Coolant outlet to thermostat housing:

• C16 NZ2, 1.8 and 2.0 liters - 8

Cooling system pump to the cylinder block:

• 1.4 and 1.6 liters, (except C16 NZ2) (M6) — 8
• C16 NZ2, 1.8 and 2.0 liters (M8) - 25

Crankshaft sensor wheel:

• C16 NZ2, 1.8 and 2.0 liters - 13

Head to cylinder block:*

• 1.4 and 1.6 liters, (except C16 NZ2):
• Stage 1 - 25
• Stage 2 - Turn to 60° angle
• Stage 3 - Turn to 60° angle
• Stage 4 - Turn to 60° angle
• C16 NZ2, 1.8 and 2.0 liters:
• Stage 1 - 25
• Stage 2 - Turn 90° further
• Stage 3 - Turn 90° further
• Stage 4 - Turn 90° further

Drive pulley (ribbed) belt/timing belt drive to crankshaft:*

• 1.4 and 1.6 liters, (except C16 NZ2):
• Stage 1 - 55
• Stage 2 - Turn to 45° angle
• Stage 3 - Turn further by 15°

Drive Belt Pulley to Timing Belt Drive - 20

Drive belt tensioning mechanism (ribbed) to the cylinder block - 20

Drive belt tensioning mechanism (ribbed) to the holder:

• 1.4 and 1.6 liters, (except C16 N₂2) — 20
• C16 NZ2, 1.8 and 2.0 liters - 18

Engine support bracket to cylinder block - 60

Engine to Transmission Mounting Bracket - 60

Engine Mounting Bracket - 60

Engine mounting bracket to front axle housing - 40

Power Steering Pump Bracket to Engine Mount Bracket - 60

Engine mount bracket to frame side - 65

Exhaust manifold to cylinder head - 22

Exhaust pipe to manifold - 25

Flexible plate to crankshaft - 60

Flywheel to crankshaft:*

• 1.4 and 1.6 liters, (except C16 NZ2):
• Stage 1 - 35
• Stage 2 - Turn to 30° angle
• Stage 3 - Turn further by 15°
• C16NZ2, 1.8 and 2.0 liters:
• Stage 1 - 65
• Stage 2 - Turn to 30° angle
• Stage 3 - Turn further by 15°

Front Toothed Belt Cover to Rear Cover - 4



Fuel pump to camshaft housing - 18

Guide bushing, release bearing to transmission - 22

Heat-resistant shield bushings to cylinder head - 30

Intake manifold to cylinder head - 22

Knock sensor to cylinder block (X16 SZ) — 13

Main Bearing Cap:*

• Stage 1 - 50
• Stage 2 - Turn to 45° angle
• Stage 3 - Turn further by 15°

Oil filter to oil pump/cylinder block - 6

Bracket of the oil pump inlet pipe to the cylinder block - 6

Inlet pipe to oil pump - 8

Oil lines to the radiator - 22

Oil pressure sensor to oil pump:

• 1.4 and 1.6 liters, (except C16 NZ2) — 30
• C16 NZ2, 1.8 and 2.0 liters - 40

Oil pressure reducing valve to oil pump - 30

Cover to the oil pump - 6

Oil pump to cylinder block - 6

Oxygen sensor to exhaust manifold - 30

Power Steering Pump Bracket to Holder:

• C16 NZ2, 1.8 and 2.0 liters - 18

Power steering pump to holder - 25

Right engine mount bracket to lower frame - 65

Generator bracket - 25

Spark plugs - 25

Starter to cylinder block (M10) - 45

Starter to cylinder block (M12) - 60

Pallet:

• 1.4 and 1.6 liters, (except C16 NZ2) — 8
• C16 NZ2, 1.8 and 2.0 liters - 15

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Drain plug of the pan - 55

Holder for cylinder block - 35

Coolant Temperature Gauge Sensor to Cylinder Head - 20

Thermostat housing:

• 1.4 and 1.6 liters, (except C16 NZ2) — 10
• C16 NZ2, 1.8 and 2.0 liters - 15

Timing belt tensioner mechanism to the oil pump:

• 1.4 and 1.6 liters, (except C16 NZ2) — 55

Timing Belt Cover to Oil Pump/Camshaft Housing:

• 1.4 and 1.6 liters, (except C16 NZ2) — 12
• C16 NZ2, 1.8 and 2.0 liters - 6

Timing belt sprocket to crankshaft:

• C16 NZ2, 1.8 and 2.0 liters:
• Stage 1 - 130
• Stage 2 - Turn to an angle of 40°-50°

Transmission to engine (M10) - 45

Transmission to engine (M12) - 60