Opel Vectra A - the Repair manual and operation

3. Engine

The SOHC engine is an engine with one camshaft installed in a head of the block of cylinders.

General information

Type
All models	The engine with four cylinders rowed, with water cooling, established cross in a forward part of the car. The drive of valves is carried out by one camshaft through hydraulic pushers put in action by a gear belt
Codes of engines:
– 14 NV	1,4 l (1389 cm3)
– 16 SV	1,6 l (1598 cm3)
– X16 SZ	1,6 l (1598 cm3) of "Ecotec"
– 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)
– 20 SEH	2.0 l (1998 cm3) early SRi
– C20 NE	2.0 l (1998 cm3) + catalyst
Pistons:	Diameter (mm)	Course (mm)
– 14 NV	77,6	73,4
– 16 SV, C16 SV, C16 NZ and X16 SZ	79,0	81,5
– C16 NZ2	80,0	79,5
– 18 SV and C18 NZ	84,8	79,5
– 20 NE, 20 SEH and C20 NE	86,0	86,0
Extent of compression:
– 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 h.p.) at 5600 rpm
– 16 SV	60 kW (82 h.p.) at 5400 rpm
– X16 SZ	52 kW (71 h.p.) at 5000 rpm
– C16 NZ and C16 NZ2	55 kW (75 h.p.) at 5200 rpm
– 18 SV and C18 NZ	66 kW (90 h.p.) at 5400 rpm
– 20 NE and C20 NE	85 kW (116 h.p.) at 5200 rpm
– 20 SEH	95 kW (129 h.p.) at 5600 rpm
Maximum torque:
– 14 NV	108 Nanometer at 3000 rpm
– X16 SZ	128 Nanometer at 2800 rpm
– 16 SV	130 Nanometer at 2600 rpm
– C16 NZ and C16 NZ2	125 Nanometer at 2800 rpm
– 18 SV	148 Nanometer at 2800 rpm
– C18 NZ	145 Nanometer at 3000 rpm
– 20 NE	175 Nanometer at 2600 rpm
– 20 SEH	180 Nanometer at 4600 rpm
– C20 NE	170 Nanometer at 2600 rpm
Operating procedure of cylinders:
all models	1 – 3 – 4 – 2 (the cylinder No. 1 is located from a gear belt)

Block of cylinders

Material	Cast iron
• the most admissible ovality of cylinders	0,013 mm
• the most admissible conicity of cylinders	0,013 mm
• the most admissible boring of cylinders	0,5 mm

Bent shaft and bearings

Number of radical bearings	5
Diameter of radical necks, mm:
– 14 NV, 16 SV, C16 NZ and X16 SZ
• nominal	54,980 – 54,997
• increased 0,25 mm	54,730 – 54,747
• increased 0,50 mm	54,482 – 54,495
C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 CEH
• nominal	57,947 – 57,995
• increased 0,25 mm	57,732 – 57,745
• increased 0,50 mm	57,482 – 57,495
Color tag of inserts of radical bearings:	In a cover	In the block of cylinders
– 14 NV, 16 SV, C16 NZ and X16 SZ
• nominal	Brown	Green
• uuvelichenny 0,25 mm	Brown/blue	Green/blue
• increased 0,50 mm	Brown/white	Green/white
– C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 CEH
• nominal	Brown/green/white
• increased 0,25 mm	Brown/blue and Green/blue
• increased 0,50 mm	Brown/white and Green/white
Width of the central (persistent) radical neck, mm:
– 14 NV, 16 SV, C16 NZ and X16 SZ
• nominal	26,000 – 26,052
• increased 0,25 mm	26,200 – 26,252
• increased 0,50 mm	26,400 – 26,452
– C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 CEH
• nominal	25,950 – 26,002
• increased 0,25 mm	26,150 – 26,202
• increased 0,50 mm	26,350 – 26,402
Diameter of a conrod neck, mm:
– 14 NV, 16 SV, C16 NZ and X16 SZ
• nominal	42,971 – 42,987
• increased 0,25 mm	42,721 – 42,737
• increased 0,50 mm	42,741 – 42,487
– C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 CEH
• nominal	48,970 – 48,988
• increased 0,25 mm	48,720 – 48,738
• increased 0,50 mm	48,470 – 48,488
Color tag of inserts of conrod bearings (all models):
– nominal	No
– increased 0,25 mm	Blue
– increased 0,50 mm	White
Ovality of radical and conrod necks (all models)	At most 0,04 mm
Gap in radical bearings, 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 CEH	0,015 – 0,040
Gap in conrod bearings, 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 CEH	0,006 – 0,031
Axial side play of a bent shaft, 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 CEH	0,050 – 0,152
Side side play of a rod (all models), mm	0,07 – 0,24

Diameters of pistons and cylinders, mm	Diameter of the cylinder	Diameter of the piston	ID tag
14 NV:
– nominal size 1	77,56	77,54	6
	77,57	77,55	7
	77,58	77,56	8
	77,60	77,58	00
– nominal size 2	77,59	77,57	99
	77,62	77,60	02
– the repair size is 0,5 mm	78,02	78,05	7 +0,5
16 SV, C16 NZ and X16 SZ:
– nominal size 1	78,95	78,93	5
	78,96	78,94	6
	78,97	87,95	7
	87,98	78,96	8
– nominal size 2	78,99	78,97	99
	79,00	78,98	00
	79,01	78,99	01
	79,02	79,00	02
– nominal size 3	79,03	79,01	03
	79,04	79,02	04
	79,05	79,03	05
	79,06	79,04	06
– nominal size 4	79,07	79,05	07
	79,08	79,06	08
	79,09	79,07	09
	79,10	79,08	1
	79,48	79,45	7 +0,5
C16 NZ2:
– nominal size	79,98	–	98
	79,90	–	99
	80,00	–	00
	80,01	–	01
	80,02	–	02
18 SV and C18 NZ:
– nominal size 1	84,78	84,76	8
– nominal size 2	84,79	84,77	99
	84,80	84,78	00
	84,81	84,79	01
	84,82	84,80	02
– the repair size is 0,5 mm	85,27	85,25	7 +0,5
20 NE, C20 NE and 20 SEN:
– nominal size 1	85,98	85,96	8
– nominal size 2	85,99	85,97	99
	86,00	85,98	00
	86,01	85,99	01
	86,02	86,00	02
– the repair size is 0,5 mm	86,47	86,45	7 +0,5
Piston gap in the cylinder (all models)	0,02 – 0,04 mm

Piston rings

Quantity on one piston (all models)	2 compression and 1 oil scraper
Gap in the lock of a piston ring, mm:
– compression	0,3 – 0,5
– oil scraper (top and lower ring)	0,4 – 1,4
– shift of locks of rings in relation to the lock of an oil scraper ring	180 °

Head of the block of cylinders

Material (all models)	Light alloy
The most admissible neploskosnost of the lower surface of a head of the block of cylinders (all models)	0,025 mm
Height of a head of the block of cylinders (all models)	96,00 ± 0,25 mm
Width of a saddle of the valve, mm:
– 14 NV, 16 SV, C16 NZ, X16 SZ and C16 NZ2:
• inlet	1,3 – 1,5
• final	1,6 – 1,8
– 18 SV, C18 NZ, 20 NE, C20 NE and 20 CEH:
• inlet	1,0 – 1,5
• final	1,7 – 2,2

Camshaft

Diameter of necks of bearings of a cam-shaft	Normal, mm	Repair 0,1 mm
Diameter of the bearing of a cam-shaft:
– 14 NV, 16 SV, C16 NZ and X16 SZ
• No. 1	39,500 – 39,525
• No. 2	39,750 – 39,775
• No. 3	40,000 – 40,025
• No. 4	40,250 – 40,275
• No. 5	40,500 – 40,525
– C16 NZ2, 18 SV, C18 NZ, 20 NE, C20 NE and 20 CEH:
• No. 1	42,500 – 42,525	42,400 – 42,425
• No. 2	42,750 – 42,775	42,650 – 42,675
• No. 3	43,000 – 43,025	42,900 – 42,925
• No. 4	43,250 – 43,275	43,150 – 43,175
• No. 5	43,500 – 43,525	43,400 – 43,425
Raising of a cam, mm:
– 14 NV (inlet and final)	6,12
– 16 SV and C16 NZ:
• inlet	5,61
• final	6,12
– C16 NZ2, 18 SV and C18 NZ:
• inlet	6,01
• final	6,39
– C20 NE and 20 NE (inlet and final)	6,67
– 20 SEN (inlet and final)	6,70
The most admissible curvature of an axis of the camshaft (all models)	0,04 mm
Axial side play (all models)	0,09 – 0,21 mm

Gear belt (engines without automatic mechanism of a tension)

Measurement of a tension of a belt by means of the special Opel KM-51 0-A tool:
– 14 NV, 16 SV and C16 NZ:
• new belt cold	5,5
• new belt, warm	8,0
• the belt which was in the use cold	4,0
• the belt which was in the use warm	7,0
– 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH:
• new belt cold	4,5
• new belt, warm	7,5
• the belt which was in the use cold	2,5
• the belt which was in the use warm	7,0

Valves and guides of valves

	Inlet	Final
Full length of the new valve, mm:
– 14 NV	105,0	105,0
– 16 SV, X16 SZ and C16 NZ	101,5	101,5
– C16 NZ2	104,2	104,2
– 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH	104,2	104,0
Full minimum length of the valve, mm:
– 14 NV	104,6	104,6
– 16 SV, X16 SZ and C16 NZ	101,1	101,1
– C16 NZ2	103,8	103,8
– 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH	103,8	103,6
Diameter of a plate of the valve, mm:
– 14 NV	33,0	29,0
– 16 SV, X16 SZ, C16 NZ and C16 NZ2	38,0	31,0
– 18 SV, C18 NZ, 20 NE, C20 NE and 20 SEH	41,8	36,5
Diameter of a core of the valve (all engines), mm:
– nominal	6,988 – 7,012	6,978 – 6,992
– the repair size is +0,075 mm	7,073 - 7,087	7,053 – 7,067
– the repair size is +0,150 mm	7,148 – 7,162	7,128 – 7,142
– the repair size is +0,250 mm	7,248 – 7,262	7,228 – 7,242
Internal diameter of the directing valve plug (all engines), mm:
– nominal	7,030 – 7,050
– the repair size is +0,075 mm	7,105 – 7,125
– the repair size is +0,150 mm	7,180 – 7,200
– the repair size is +0,250 mm	7,280 – 7,300
Valve gap in the directing tulka (all engines), mm:
– inlet	0,018 – 0,052
– final	0,038 – 0,072
Corner of a working facet of a saddle of the valve:
all engines	44 °
Gap of valves:
all engines	Automatic adjustment by hydraulic pushers of valves

Flywheel

The most admissible side beating of a gear wreath of a flywheel (all engines)	0,5 mm
The maximum size of regrinding of the surface interfaced to a clutch plate	0,3 mm

Gaps in the oil pump:
– between internal and external rotors (all engines)	0 – 0,2 mm
– an axial side play between the case and a rotor:
• 14 NV, 16 SV, C16 NZ and X16 SZ	0,08 – 0,15 mm
• C16 NZ2, 18 SV, C18 NZ, C20 NE and 20 SEH	0,03 – 0,10 mm
Oil pressure on idling turns on the warm engine (all engines)	1,5 bars

Tightening moments

Zabornik of the warmed-up air to a final collector	8 Nanometer
Fastening of the generator and inlet collector to an arm:
– 1,4 and 1,6 l except C16 NZ2	20 nanometers
– L C16 NZ2 1,8 and 2,0	18 Nanometer
Bolts of fastening of the generator to an arm (M8)	30 Nanometer
Bolts of fastening of the generator to an arm (M10)	40 Nanometer
Bolts of fastening of the generator to a bracket	25 Nanometer
Fastening of a cover of the conrod bearing:
– 1,4 and 1,6 l except C16 NZ2:
• stage 1	25 Nanometer
• stage 2	To tighten on a corner 30 °
– L C16 NZ2 1,8 and 2,0:
• stage 1	35 Nanometer
• stage 2	To tighten on a corner 45 °
• stage 3	To tighten on a corner 15 °
Cover of a head of the block of cylinders	8 Nanometer
Camshaft pulley	45 Nanometer
Persistent plate of fixing of the camshaft	8 Nanometer
Branch pipe to a thermostat casing:
– L C16 NZ2 1,8 and 2,0	8 Nanometer
The water pump to the block of cylinders:
– 1,4 and 1,6 l except C16 NZ2 (M6)	8 Nanometer
– C16 NZ2 1,8 and 2,0 of l (M8)	25 Nanometer
Sensor of provision of a bent shaft:
– L C16 NZ2 1,8 and 2,0	13 Nanometer
Bolts of fastening of a head of the block цилиндров*:
– 1,4 and 1,6 l except C16 NZ2:
• stage 1	25 Nanometer
• stage 2	To tighten on a corner 60 °
• stage 3	To tighten on a corner 60 °
• stage 4	To tighten on a corner 60 °
– L C16 NZ2 1,8 and 2,0:
• stage 1	25 Nanometer
• stage 2	To tighten on a corner 90 °
• stage 3	To tighten on a corner 90 °
• stage 4	To tighten on a corner 90 °
Pulleys of an auxiliary driving and gear belt to a bent shaft:
– 1,4 and 1,6 l except C16 NZ2:
• stage 1	55 Nanometer
• stage 2	To tighten on a corner 45 °
• stage 3	To tighten on a corner 15 °
Pulleys of an auxiliary driving and gear belt to a bent shaft	20 Nanometer
Pulley of an auxiliary gear belt, driving to pulley	20 Nanometer
The mechanism of a tension of a driving belt to an arm:
– 1,4 and 1,6 l except C16 NZ2	20 Nanometer
– L C16 NZ2 1,8 and 2,0	18 Nanometer
Arm of a support of the power unit to the block of cylinders	60 Nanometer
Arm to an arm of a support of the power unit	60 Nanometer
Arm of a support of the power unit to the lower frame	40 Nanometer
Arm of the pump of the amplifier of steering to an engine arm	60 Nanometer
Arm of a support power to a side frame	65 Nanometer
Final collector to a head of the block of cylinders	22 Nanometer
Reception exhaust pipe to a final collector	25 Nanometer
Drive plate to a bent shaft	60 Nanometer
Flywheel to a cranked valu*:
– 1,4 and 1,6 l except C16 NZ2:
• stage 1	35 Nanometer
• stage 2	To tighten on a corner 30 °
• stage 3	To tighten on a corner 15 °
– L C16 NZ2 1,8 and 2,0:
• stage 1	65 Nanometer
• stage 2	To tighten on a corner 30 °
• stage 3	To tighten on a corner 15 °
Forward casing of a gear belt to a back casing	4 Nanometer
The pumping-up fuel pump to a cover of a head of the block of cylinders	18 Nanometer
The directing plug and the release bearing to the transmission	22 Nanometer
Thermofilter plugs to a head of the block of cylinders	30 Nanometer
Inlet collector to a head of the block of cylinders	22 Nanometer
The detonation sensor to the block of cylinders (X16 SZ)	13 Nanometer
Bolts of fastening of covers radical подшипника*:
– stage 1	50 Nanometer
– stage 2	To tighten on a corner 45 °
– stage 3	To tighten on a corner 15 °
Oil filter to the oil pump / block of cylinders	6 Nanometer
Arm of a maslopriyemny pipe to the block of cylinders	6 Nanometer
Maslopriyemny pipe to the oil pump	8 Nanometer
Oil pipelines to a radiator	22 Nanometer
The oil pressure sensor to the oil pump:
– 1,4 and 1,6 l except C16 NZ2	30 Nanometer
– L C16 NZ2 1,8 and 2,0	40 Nanometer
Perepuskna the valve to the oil pump	30 Nanometer
Back cover to the oil pump	6 Nanometer
The oil pump to the block of cylinders	6 Nanometer
The oxygen sensor to a final collector	30 Nanometer
Arm of the pump of the amplifier of steering:
– L C16 NZ2 1,8 and 2,0.	18 Nanometer
The right arm of fastening of the power unit to the lower frame.	65 Nanometer
Arm to the generator	25 Nanometer
Spark plugs	25 Nanometer
Starter to the block of cylinders (M10)	45 Nanometer
Starter to the block of cylinders (M12)	60 Nanometer
Oil pallet:
– 1,4 and 1,6 l except C16 NZ2	8 Nanometer
– L C16 NZ2 1,8 and 2,0	15 Nanometer
Masloslivny stopper	55 Nanometer
Arm to the block of cylinders	35 Nanometer
The sensor of the index of temperature of cooling liquid to a head of the block of cylinders	20 Nanometer
Thermostat casing:
– 1,4 and 1,6 l except C16 NZ2	10 Nanometer
– L C16 NZ2 1,8 and 2,0	15 Nanometer
The mechanism of a tension of a gear belt to the oil pump:
1,4 and 1,6 l except C16 NZ2	55 Nanometer
Casing of a gear belt to the oil pump / cover of a head of the block of cylinders:
– 1,4 and 1,6 l except C16 NZ2	12 Nanometer
– L C16 NZ2 1,8 and 2,0	6 Nanometer
Pulley of a gear belt to a bent shaft:
– L C16 NZ2 1,8 and 2,0	6 Nanometer
• stage 1	130 Nanometer
• stage 2	To tighten on a corner 40 – 50 °
Bolts of fastening of the transmission to the engine (M10)	45 Nanometer
Bolts of fastening of the transmission to the engine (M12)	60 Nanometer

* It is necessary to use only new bolts. The moments of tightening of bolts of fastening of a head of the block of cylinders are specified only for bolts of the latest modification. When using bolts of early modification, the moment of tightening of bolts needs to be specified at the dealer of Opel.