1.3 litre petrol engine specifications (Skoda Favorit)

Contents: Cylinder block ⬇ Crankshaft ⬇ Pistons and piston rings ⬇ Piston pins ⬇ Connecting rods ⬇ Cylinder head ⬇ Camshaft and rocker arms ⬇ Valves ⬇ Lubrication system ⬇ Tightening torques Nm ⬇

Type - 4-cylinder, in-line, four-stroke, water-cooled

Designation:

1.3 low compression - Skoda 781.135
1.3 high compression - Skoda 781.136

Cylinder bore diameter - 75.50 mm

Piston stroke - 72.00 mm

Working volume - 1289 cm³

The firing order of the cylinders is 1-3-4-2 (cylinder No.1 from the crankshaft pulley side)

Direction of crankshaft rotation - Clockwise (if you look from the right side of the car)

Compression ratio:

Engine 135 - 8.8:1
Engine 136 - 9.7:1

Output power:

Engine 135 - 59 hp (43 kW) at 5000 rpm
Engine 136 - 63 hp (46 kW) at 5000 rpm

Cylinder block

Material - Aluminum alloy

Cylinder liner diameter:

Nominal - class A - 75.500 mm
Nominal - class B - 75.510 mm
Nominal - class C - 75.520 mm

Permissible deviations from the nominal diameter are +0.009 mm/-0 mm

Height of cylinder liner protrusion above cylinder block:

Nominal - 0.07-0.13 mm
The maximum difference between any two cases is 0.04 mm

Crankshaft

Number of main bearings - 3

Main bearing journal diameter:

Nominal - 60.00 mm
1st regrind - 59.75 mm
2nd re-sharpening - 59.50 mm
3rd regrind - 59.25 mm

Permissible diameter deviations (all necks) - from -0.010 to -0.029 mm

Main bearing shell thickness:

Nominal - 2.495 mm
1st regrinding - 2.620 mm
2nd re-sharpening - 2.745 mm
3rd regrind - 2.870 mm

Tolerances for thickness (all bearings) — from +0.000 to -0.010 mm

Main bearing working clearance - 0.016-0.065 mm

Connecting rod bearing journal diameter.

Nominal - 45.00 mm
1st regrind - 44.75 mm
2nd re-sharpening - 44.50 mm
3rd re-sharpening - 44.25 mm

Permissible diameter deviations (all necks) - from -0.009 to -0.025 mm

Connecting rod bearing shell thickness:

Nominal - 1.490 mm
1st regrinding - 1.615 mm
2nd re-sharpening - 1.740 mm
3rd regrind - 1.865 mm

Tolerances for thickness (all bearings) — from +0.000 to -0.007 mm

Working clearance of connecting rod bearing - 0.019-0.060 mm

Main bearing journal width No.1:

Nominal - 31,500 mm
1st regrind - 31.625 mm
2nd re-sharpening - 31.750 mm
3rd regrind - 31.875 mm

Permissible width deviations are from 0.000 to +0.025 mm

Thrust washer thickness:

Nominal - 1.490 mm
1st regrinding - 1.615 mm
2nd re-sharpening - 1.740 mm
3rd regrind - 1.865 mm

Thickness tolerances (all washers) - from +0.000 to -0.010 mm

Crankshaft axial clearance - 0.020-0.106 mm

Pistons and piston rings

Piston diameter:

Nominal - class A - 75.475 mm
Nominal - class B - 75.485 mm
Nominal - class C - 75.495 mm
Permissible deviations of diameter (all pistons) — ±0.009 mm

The gap between the piston and the cylinder bore is 0.025 mm

Clearance between the ring and the wall of the groove in the piston:

Upper compression ring - 0.040-0.072 mm
Second compression ring - 0.030-0.062 mm

Piston ring gap:	New	Limit value
Compression rings	0.25-0.40 mm	1.00 mm
Oil scraper ring	0.20-0.35 mm	1.00 mm

Piston pins

Diameter - 19.997-20.000 mm

Connecting rod upper head bushing diameter: 19.999-20.005 mm

The diameter of the hole for the pin in the piston is 19.998-20.006 mm

Piston pin clearances:

Between the pin and the piston - 0.002-0.007 mm
Between the pin and the bushing of the upper connecting rod head - 0.001-0.008 mm

Connecting rods

Length between centers - 133±0.1 mm

Axial clearance of the connecting rod cap - 0.065-0.182 mm

Cylinder head

Material - Aluminum alloy

Valve seat angle - 45°

Valve seat width:

Inlet valve 1.5 mm
Exhaust valve 1.7 mm

Camshaft and rocker arms

Drive - Chain from crankshaft pulley

Number of bearings - 3

Camshaft cam diameter:

From the pulley side - 38.950-38.975 mm
Central - 38.450-38.475 mm
From the flywheel side - 29.959-29.980 mm

Diameter of the opening formed by the bearing surfaces of the camshaft:

From the pulley side - 39.000-39.025 mm
Central - 38.500-38.525 mm
From the flywheel side - 30.000-30.021 mm

Working clearance of camshaft bearings - 0.025-0.075 mm

Camshaft axial clearance - 0.020-0.066 mm

Rocker Arm Outer Diameter:

Nominal - 20.980-21.000 mm
Repair - 21.193-21.200 mm

Inner diameter of the hole in the rocker arm:

Nominal - 21.000-21.021 mm
Repair - 21.200-21.221 mm

Valves

Saddle angle - 45°

Head diameter:

Inlet valve - 34.00±0.12 mm
Exhaust valve - 30.00±0.12 mm

Rod diameter (nominal):

Inlet valve - 7.982±0.015 mm
Exhaust valve - 7.975±0.015 mm

Clearance between valve stem and guide:

Inlet valve - 0.018-0.037 mm
Exhaust valve - 0.025-0.037 mm

Setting the valve timing (at a nominal clearance of 0.43 mm):

Inlet valve opening - 12° BTDC
Intake valve closing - 48° after BDC
Exhaust valve opening - 42° BC
Exhaust valve closing - 8° after TDC

Free length of valve spring:

Inner spring - 43.60 mm
Outer spring - 45.85 mm

Lubrication system

System pressure:

Minimum at 1500 rpm - 3.5 bar
Maximum - 5.8 bar

Oil pump type - Gear with power feed

Oil pump clearances:

Between the pinion shaft and the cover:

Nominal - 0.02-0.06 mm
Wear limit - 0.15 mm

Between the pin and the driven gear:

Nominal - 0 014-0.050 mm
Wear limit - 0.1 mm
Between the gears and the pump cover (axial clearance) — Maximum 0.1 mm

Tightening torques Nm

Cylinder head mounting bolts:

Stage 1 - 17-20
Stage 2 - Turn 90°
Stage 3 - Turn 90° further

Cylinder head nuts - 20-23

Valve cover nuts - 2-3

Valve mechanism mounting bolts - 25-30

Drive chain cover bolts - 5-8

Rocker cover nuts - 2-3

Pan bolts - 7-9

Oil Pump Inlet Tube/Screen Filter - 5-8

Flywheel bolts - 55-65

Flywheel housing plate bolts - 8-10

Camshaft Sprocket Bolt - 30-35

Crankshaft pulley bolt - 100-120

Main Bearing Cap Bolt - 67-75

Connecting rod bearing cap nut - 36-40

Oil pressure sensor - 20-25

Plugs of oil channels in the cylinder block: