Opel:: Kadett E:: Technical characteristic

4.1.1. Technical characteristic

The OHV engine is an engine with one camshaft installed in the block of cylinders.

Designation	12 SC
Diameter of the cylinder x piston stroke	79,0 x 61,0 mm
Working volume	1196 ^cm3
Extent of compression	9,0: 1
Valvate gaps (warm engine):
– inlet	0,15 mm
– final	0,25 mm
Head of the block of cylinders
Designation	Е
Valve saddle width:
– inlet	1,25 – 1,50 mm
– inlet	1,25 – 1,50 mm
Full height	81 ± 0,25 mm

Valves and guides

Parameter	Inlet	Final
Length	99,3 mm	101,1 mm
Diameter of a plate	32 mm	29 mm
Diameter of a core (face value, ± 0,005 mm):
– standard	7,005 mm	6,995 mm
– the increased size 1	7,080 mm	7,060 mm
– the increased size 2	7,155 mm	7,135 mm
– the increased size A	7,255 mm	7,235 mm
Internal diameter of the directing valve plug (± 0,01 mm):
– standard	7,035 mm
– the increased size 1	7,110 mm
– the increased size 2	7,185 mm
– the increased size A	7,285 mm
Valvate gap in a guide:
– inlet	0,015 – 0,045 mm
– final	0,035 to 0,065 mm
Corner of a working facet	44 °

Camshaft

Pistons and cylinders

Parameter	Diameters	Marking
Production size 1	78,95 mm	5
	78,96 mm	6
	78,97 mm	7
	78,98 mm	8
Production size 2	78,99 mm	99
	79,00 mm	00
	79,01 mm	01
	79,02 mm	02
Production size 3	79,03 mm	03
	79,04 mm	04
	79,05 mm	05
	79,06 mm	06
Production size 4	79,07 mm	07
	79,08 mm	08
	79,9 mm	09
	79,10 mm	1
The increased size (+ 0,5 mm face value)	79,47 mm	79,47/7 + 0,5
	79,48 mm	79,48/8 + 0,5
	79,49 mm	79,49/9 + 0,5
	79,50 mm	79,50/0 + 0,5
Gap between the piston and the cylinder	0,1 – 0,3 mm
Ovality and conicity of cylinders	At most 0,013 mm

Piston rings

Quantity on the piston	2 compression, 1 oil scraper
Thickness:
– compression	2,0 mm
– oil scraper	5,0 mm
Locks of rings:
– shift of locks of piston rings	180 ° (see subsection 4.1.10.2)
– a gap of piston rings in a piston flute	It is not specified – typical 0,06 mm

Piston fingers

Length	65 mm
Diameter	20 mm
Gap in the piston	0,0015 – 0,0195 mm
Gap in a rod	Without gap (motionless landing)

Bent shaft and bearings

Number of radical bearings	3
Diameters of necks of radical bearings – standard:
– forward	53,997 – 54,010 mm
– central and back	54,007 – 54,020 mm
Width of a neck of the central radical bearing – standard	29,000 – 29,052 mm
Identification of an insert of the radical bearing:
– increased on 0,25	A
– increased on 0,50	In
Ovality of radical and conrod necks	At most 0,006 mm
Conicity of radical and conrod necks	At most 0,01 mm
Axial side play of a bent shaft	0,09 – 0,20 mm
Rod side play	0,02 – 0,06 mm
Working gap of radical bearings:
– forward	0,020 – 0,046 mm
– central	0,010 – 0,036 mm
– back	0,010 – 0,032 mm
Working gap of the conrod bearing	0,11 – 0,24 mm
Beating of a bent shaft (on the central neck)	At most 0,03 mm

Identification of inserts of radical bearings

Insert	Color	Code
Standard:
– forward top	Brown	1 ON or 701-N
– forward lower	Brown	1 UN or 702-N
– the central top	Brown	20 + UN or 705-N
– the central lower	Green	20 + UN or 725-N
– back top	Green	631-N
– back lower	Green	635-N
Standard neck, opening of the increased size:
– forward top	U1-OB
– forward lower	U1-U
– central, top and lower	U
– back top	U3-OB
– back lower	U3-U
Diameter of a conrod neck – standard	44,971 – 44,987 mm
The increased sizes of radical and connecting rods	0,25 mm production and repair; 0,50 mm only repair
The increased size 0,25:
– forward top	Brown-blue	1 OA or 006-A
– forward lower	Brown-blue	1 UA or 008-A
– the central top	Brown-blue	20 + UA or 014-A
– the central lower	Brown	20 + UA or 034-A
– back top	Green-blue	632-A
– back lower	Green-blue	636-A
The increased size 0,50:
– forward top	Brown-black	1 OB or 027 V
– forward lower	Brown-black	1 U or 029 V
– the central top	Brown-black	2 OB 0,35 IN
– the central lower	Green-black	2 UB 0,35 IN
– back top	No	3 OB 0,50
– back lower	No	3 U 0,50

Flywheel

Beating of a gear wreath	At most 0,5 mm
Machining thickness from coupling	At most 0,3 mm

Lubrication system

Gaps of the oil pump:
– between teeths of gear wheels	0,1 – 0,2 mm
– between a gear wheel and the case	0,04 – 0,10 mm
Oil pressure on idling turns (the engine warm)	1,5 bars

Tightening moments

Bolts of fastening of a flywheel (every time use new bolts):
– stage 1	35 Nanometer
– stage 2	To tighten on a corner 50 ° – 90 °
Covers of radical bearings	62 Nanometer
Covers of conrod bearings	27 Nanometer
Bolts of fastening of the oil pallet (with structure interfering unscrewing)	5 Nanometer
Bolts of fastening of a head of the block of cylinders (every time use new bolts):
– 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 °
Camshaft pulley	40 Nanometer
Pulley of a bent shaft	40 Nanometer
Right support of the power unit:
– to the block of cylinders (to establish the lower bolt with sealant use)	20 Nanometer
– to a damper	40 Nanometer
Support of the power unit to a body:
– back left	65 Nanometer
– back right	40 Nanometer
Drain stopper of the oil pallet	45 Nanometer
Bolts of fastening of the oil pump	20 Nanometer