Technical characteristics of petrol engines DOHC 1.8 and 2.0 l (Opel Vectra B)

Cylinder head
Maximum permissible non-flatness of the lower surface of the head cylinder block	0.05 mm
Cylinder head height	134 mm
Valve seat width:
- inlet valve	1.0 – 1.5 mm
- exhaust valve	1.7 – 2.2 mm
Valves
Height of valve guide bushing in cylinder head	13.70 – 14.00 mm
Valve stem diameter:
– inlet valve:
• nominal (K)	5.955 – 5.970 mm
• 1st size up (0.075 mm – K1)	6.030 – 6.045 mm
• 2nd larger size (0.150 mm – K2)	6.105 – 6.120 mm
– exhaust valve:
• nominal (K)	5.945 – 5.960 mm
• 1st size up (0.075 mm – K1)	6.020 – 6.035 mm
• 2nd larger size (0.150 mm – K2)	6.095 – 6.110 mm
Valve stem outlet	less than 0.03 mm
Valve guide bore diameter:
– nominal (K)	6.000 to 6.012 mm
– 1st increased size (0.075 mm – K1)	6.075 – 6.090 mm
– 2nd larger size (0.150 mm – K2)	6.150 – 6.165 mm
Clearance between valve stem and guide:
- inlet valve	0.030 – 0.057 mm
- exhaust valve	0.040 – 0.067 mm
Valve length:
- new	102.0 mm
- minimum	101.7 mm
Valve Plate Diameter:
- inlet valve	31.9 – 32.1 mm
- exhaust valve	28.9 to 29.1 mm
Cylinder block
Maximum permissible non-flatness	0.05 mm
Cylinder diameters:
- standard (1.8 liter engine):
• size group 8	81.575 to 81.585 mm
• size group 99	81.585 to 81.595 mm
• size group 00	81.595 to 81.605 mm
• size group 01	81.605 to 81.615 mm
• size group 02	81.615 to 81.625 mm
– increased size (0.5 mm)	82.065 to 82.075 mm
- standard (2.0 liter engine):
• size group 8	85.975 to 85.985 mm
• size group 99	85.985 to 85.995 mm
• size group 00	85.995 to 86.005 mm
• size group 01	86.005 to 86.015 mm
• size group 02	86.015 to 86.025 mm
– increased size (0.5 mm)	86.465 to 86.475 mm
Maximum ovality of cylinder diameter	0.013 mm
Maximum cylinder taper	0.013 mm
Pistons and rings
Piston diameter:
- standard (1.8 liter engine):
• size group 8	81.555 – 81.565 mm
• size group 99	81.565 – 81.575 mm
• size group 00	81.575 – 81.585 mm
• size group 01	81.585 – 81.595 mm
• size group 02	81.595 – 81.605 mm
– larger size (0.5 mm) – size group 7 + 0.5	82.045 – 82.055 mm
- standard (2.0 liter engine):
• size group 8	85.955 to 85.965 mm
• size group 99	85.965 to 85.975 mm
• size group 00	85.975 to 85.985 mm
• size group 01	85.985 to 85.995 mm
• size group 02	85.995 to 86.005 mm
– larger size (0.5 mm) – size group 7 + 0.5	86.445 – 86.455 mm
Piston clearance in cylinder	0.02 – 0.04 mm
Piston ring lock clearances (installed in the hole):
- upper and lower sealing rings	0.3 – 0.5 mm
- oil scraper ring	0.4 – 1.4 mm
Piston ring thickness:
- upper and lower sealing rings	1.5 mm
- oil scraper ring	3.0 mm
Piston ring clearance in the piston	N/ A
Piston pins
Diameter	21 mm
Length:
– 1.8 liter engines	56.0 mm
– 2.0 liter engines	61.5 mm
Piston pin clearance in piston	0.011 – 0.014 mm
Connecting rod
Lower connecting rod end side clearance	0.07 – 0-24 mm
Crankshaft
Axial play	0.05 – 0.15 mm
Main journal diameters:
- standard:
• 1st size group (white)	57.974 – 57.981 mm
• 2nd size group (green)	57.981 – 57.988 mm
• 3rd size group (brown)	57.988 – 57.995 mm
– 1st reduced (0.25 mm)	57.732 – 57.745 mm
– 2nd reduced (0.50 mm)	57.482 – 57.495 mm
Connecting rod journal diameters:
- standard	48.970 – 48.988 mm
– 1st reduced (0.25 mm)	.48.720 – 48.738 mm
– 2nd reduced (0.50 mm)	48.470 – 48.488 mm
Maximum ovality	0.04 mm
Maximum taper	N/ A
Main bearing working clearance	0.015 – 0.040 mm
Operating clearance of the lower connecting rod bearing	0.006 – 0.031 mm

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Opel Vectra B: Engine repair

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