Technical characteristics of gasoline engines (Sierra)

Engines - gasoline, four-stroke, four-cylinder, in-line, water-cooled, have a camshaft in the cylinder head, installed transversely in front of the car.

Main parameters

Engine	1,3 HC OHC	1.6 NS ONS	1.6 NS ONS economical	2.0 NS ONS
Engine type	JCT	LCT	LCS	NET
Cylinder diameter (mm)	79,02	87,67	87,67	90,82
Piston stroke (mm)	66,00	66,00	66,00	76,95
Volume (cm³)	1294	1593	1593	1993
Compression ratio	9,0	9,2	9,2	9,2
Compression pressure (MPa)	1,1 – 1,3	1,1 – 1,3	1,1 – 1,3	1,1 – 1,3
Nominal power:
– kW at rpm	44 at 5700	55 at 5300	55 at 5700	77 at 5200
– HP at rpm	60 at 5700	75 at 5600	75 at 5700	105 at 5200
Maximum torque (Nm at rpm)	98 at 3100	120 at 2900	120 at 2900	157 at 4000

Cylinder head

The head is made of a special alloy and has valve seats made directly in the cylinder head material.

Designation:
– 1.3 dm³ engine	3
– 1.6 dm³ engine	6
– 2.0 dm³ engine	0
Valve seating angle	44°30' – 45°
Valve seat contact width:
- intake	1.5 mm
- graduation	2.0 mm
Maximum depth of regrinding of the lower plane of the cylinder head	0.154 mm
Diameters of the holes of the camshaft bearing seats:
- front bearing	45.072 – 45.102 mm
- middle bearing	47.692 – 47.772 mm
- rear bearing	48.072 – 48.102 mm

Cylinder head gasket

Brand: Reinz.

Valve guides

The guide holes are made directly in the cylinder head.

Nominal diameter	8.063 – 8.088 mm
Repair size:
- excess of 0.2	8.263 – 8.288 mm
- excess of 0.4	8.463 – 8.488 mm

Valves

The valves are installed in the cylinder head and are inclined at an angle of 7°30' to the cylinder axis.

Valve dimensions (mm)

Engine	1.3 dm³	1.6 dm³	2.0 dm³
Inlet valve:
- length	112,65 – 113,65	112,65 – 113,65	110,65 – 111,65
– plate diameter	38,30 – 38,70	41,80 – 42,20	41,80 – 42,20
Exhaust valve:
- length	112,05 – 113,75	112,05 – 113,75	110,10 – 112,05
– plate diameter	29,80 – 30,20	34,00 – 34,40	35,80 – 36,20

The dimensions of the intake valves are common to all engines.

Rod diameter

Nominal	8.025 – 8.043 mm
Repair size +0.2	8.225 – 8.243 mm
Repair size +0.4	8.425 – 8.443 mm
Repair size +0.6	8.625 – 8.643 mm
Repair size +0.8	8.825 – 8.843 mm

The dimensions of the exhaust valves are common to all engines.

Rod diameter

Nominal	7.999 – 8.017 mm
Repair size +0.2	8.199 – 8.217 mm
Repair size +0.4	8.399 – 8.417 mm
Repair size +0.6	8.599 – 8.617 mm
Repair size +0.8	8.799 – 8.817 mm

The clearance of the rod in the guide is 0.046–0.089 mm.

Valve clearance (cold engine):
- inlet valve	0.20 mm
- exhaust valve	0.25 mm

Valve springs

The same springs are used for the intake and exhaust valves.

Spring diameter	23.445 – 23.95 mm
Spring wire diameter	3.87 – 3.93 mm
Number of turns	4,7
Free length	47.00 mm

Engine cylinder block

The engine cylinder block is cast from cast iron. The cylinders are made directly in the cylinder block.

Bearing support width	27.17 – 27.22 mm
Inner diameters of main bearings (measured vertically):
- nominal	57,000 – 57,034 mm
– repair size -0.25	56.750 – 56.784 mm
– repair size -0.50	56,500 – 56,534 mm
– repair size -0.75	56.250 – 56.284 mm
– repair size -1.00	56,000 – 56,034 mm
Diameters of the holes of the main bearing seats in the cylinder block:
– nominal size	60.620 – 60.640 mm
– repair size +0.4	61,020 – 61,040 mm

Cylinder diameters (mm)

Engine	1.3 dm³	1.6 dm³	2.0 dm³
Designation	13	16	20
Nominal standard diameters:
- group 1	79,000 – 79,010	87,650 – 87,660	90,800 – 90,810
- group 2	79,010 – 79,020	87,660 – 87,670	90,810 – 90,820
- group 3	79,020 – 79,030	87,670 – 87,680	90,820 – 90,830
- group 4	79,030 – 79,040	87,680 – 87,690	90,830 – 90,840
Nominal diameters with tolerance:
- Group A	79,510 – 79,520	88,160 – 88,170	91,310 – 91,320
- Group B	79,520 – 79,530	88,170 – 88,180	91,320 – 91,330
- Group C	79,530 – 79,540	88,180 – 88,190	91,330 – 91,340
Repair size diameters:
- standard	79,030 – 79,040	87,680 – 87,690	90,830 – 90,840
– with a tolerance of 0.5	79,530 – 79,540	88,180 – 88,190	91,330 – 91,340
– with a tolerance of 1.0	80,030 – 80,040	88,680 – 88,690	91,830 – 91,840

Crank mechanism

Crankshaft

The steel crankshaft is supported by five bearings.

Axial play	0.08 – 0.28 mm
Main journal diameters:
– nominal size	56,970 – 56,990 mm
– repair size -0.25	56,720 – 56,740 mm
– repair size -0.50	56,470 – 56,490 mm
– repair size -0.75	56.220 – 56.240 mm
– repair size -1.00	55.970 – 55.990 mm
Main bearing clearance	0.010 – 0.064 mm
Measurements are taken using Plastigage measuring rods.
Connecting rod journal diameters:
– nominal size	51,980 – 52,000 mm
– repair size -0.25	51,730 – 51,750 mm
– repair size -0.50	51,480 – 51,500 mm
– repair size -0.75	51.230 – 51.250 mm
Thickness of thrust half rings:
– nominal size	2.30 – 2.35 mm
- repair size	2.50 – 2.55 mm

Flywheel

The flywheel is secured to the crankshaft flange with six bolts.

Intermediate shaft

The intermediate shaft is located in the front part of the cylinder block, on the left side. Provides drive for the ignition distributor, as well as the oil and fuel pumps.

Axial clearance: 0.050–0.204 mm.

Connecting rods

The connecting rods are forged from steel and have an I-beam profile in their cross-section. The piston pin is pressed into the connecting rod head.

Connecting rod head bore diameter	23.964 – 23.976 mm
Connecting rod pin tension:	0.018 – 0.039 mm
Connecting rod head heating temperature during pin installation	250 – 300°C
Connecting rod base bore diameter	55,000 – 55,020 mm
Inner diameters of connecting rod bearing holes:
– nominal size	52.006 – 52.044 mm
– repair size -0.25	51.756 – 51.794 mm
– repair size -0.50	51.706 – 51.744 mm
– repair size -0.75	51.256 – 56.294 mm
– repair size -1.00	51.006 – 51.044 mm
Main bearing clearance	0.006 – 0.064 mm
Measurements are taken using Plastigage measuring rods.
Permissible non-perpendicularity of the hole axis relative to the connecting rod axis:
- head hole	0.10 mm
- base hole	0.15 mm

Pistons

The pistons are made of light alloy, without grooves on the conductive part, with a cast invar ring, limiting thermal errors in dimensions. In the upper part there are three grooves for piston rings. The axis of the piston pin hole is offset relative to the piston axis. Pistons are supplied in sets together with pins and connecting rods.



Installation method: The arrow on the bottom of the piston should point towards the front of the engine (towards the timing drive).

Piston pins

The pins, made of a steel alloy and subjected to heat treatment, are pressed into the connecting rod heads (hot installation at a head temperature of 250°–300°C) and rotate in the piston hubs.

Length:
– 1.3 dm³ engine	60.0 – 60.8 mm
– 1.6 dm³ engine	68.0 – 68.8 mm
– engine 2.0 dm³	72.0 – 72.8 mm
Diameter:
- marked in red	23,994 – 23,997
- marked in blue	23,997 – 24,000
- marked in red	22,000 – 24,003
Piston hub clearance	0.008 – 0.014 mm
Connecting rod head tension	0.018 – 0.039 mm

Piston dimensions (mm)

Engine	1.3 dm³	1.6 dm³	2.0 dm³
Nominal standard diameters:
- group 1	78,965 – 78,975	87,615 – 87,625	90,765 – 90,775
- group 2	78,975 – 78,985	87,625 – 87635	90,775 – 90,785
- group 3	78,985 – 78,995	87,635 – 87,645	90,785 – 90,795
- group 4	78,995 – 79,005	87,645 – 87,655	90,795 – 90,805
Repair size diameters:
- standard	78,900 – 79,015	87,640 – 87,665	90,780 – 90,805
– with a tolerance of 0.5	79,490 – 79,515	88,140 – 88,165	91,280 – 91,305
– with a tolerance of 1.0	79,990 – 80,015	88,640 – 88,665	91,780 – 91,805
Clearance of new pistons in cylinders	0,015 – 0,050	0,015 – 0,050	0,025 – 0,060

Piston rings

Each piston has three rings: two sealing rings and one oil scraper ring.

Clearance of the sealing ring lock (located in the cylinder):
– engine 1.3 dm³ and engine 1.6 dm³	0.30 – 0.50 mm
– engine 2.0 dm³	0.038 – 0.048 mm
Oil scraper ring lock clearance	0.40 – 1.40 mm

Location of ring locks:

• sealing - 150° (in opposite directions) relative to the oil scraper ring lock;
• oil scraper - the expansion spring lock is installed in accordance with the direction of the arrow on the bottom of the piston; the locks of the upper and lower plates are installed 25 mm to the right and left of the direction of the arrow.

Gas distribution system

Four-cylinder in-line engine OHC (general view)

The camshaft is located in the cylinder head, drives the valves via a valve lever and is driven by a toothed belt.

Valve clearance (cold):

• inlet: 0.20 mm;
• outlet: 0.25 mm.

Distribution phases

Engine	1.3 dm³ and 1.6 dm³	2.0 dm³
OZD	22° before TDC	24° before TDC
ZZD	54° after BDC	64° after BDC
OZW	64° before BDC	70° before BDC
ZZW	12° after TDC	18° after TDC

OZD and ZZD – opening and closing of the intake valve, respectively;
OZW and ZZW – opening and closing of the exhaust valve, respectively;
TDC and BDC are top and bottom dead centers, respectively.

Toothed belt

Brand: Ford Powergrip
Type:
– 1.3 dm³ engine	70NM 6288 AA
– 1.6 dm³ engine	70NM 6288 AA
– 2.0 dm³ engine	70NM 6268 AA
Number of teeth
– 1.3 dm³ engine	119
– engine 1.6 dm³	119
– 2.0 dm³ engine	122

Camshaft

The camshaft rotates in three bearings.

Camshaft bearing diameters:
- front	41.987 – 42.013 mm
- average	44.607 – 44.633 mm
- rear	44.987 – 45.013 mm
Inner diameters of bearing bushings:
- front	42.035 – 42.055 mm
- average	44.655 – 44.675 mm
- rear	45.035 – 45.055 mm
Camshaft axial play	0.104 – 0.204 mm
Thickness of camshaft thrust washers	3.96 – 4.01 mm
Cam lift:
– 1.3 dm³ engine	5.9639 mm
– 1.6 dm³ engine	5.9639 mm
– 2.0 dm³ engine	6.3323 mm
Height of cams:
– 1.3 dm³ engine	35.894 – 36.234 mm
– engine 1.6 dm³	35.894 – 36.234 mm
– 2.0 dm³ engine	36,260 – 36,600 mm