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Vauxhall Chevette Engine

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General

Engine Identification Code 13S
Capacity 1256 cc
Bore 80,98 mm (3.188 in)
Stroke 61,00 mm (2.40 in)
Compression ratio
Standard compression (early engines)
Standard compression (later engines)
Low compression

9.2:1
8.7:1
7.3:1

Cylinder Head

Valve seat angle
Inlet
Exhaust

44 deg
44 deg
Valve seat width
Inlet
Exhaust

1,3 - 1,5 mm (0.05 - 0.06 in)
1,5 - 2,0 mm (0.06 - 0.08 in)
Valve spring free height 38 mm (1.5 in)
Valve stem diameter - standard
Inlet
Exhaust

6,980 - 6,998 mm (0.2748 - 0.2755 in)
6,972 - 6,990 mm (0.2745 - 0.2752 in)
Valve stem diameter in guide
Inlet
Exhaust

0,013 - 0,051 mm (0.0005 - 0.0020 in)
0,033 - 0,071 mm (0.0013 - 0.0028 in)
Max. permissible cylinder head face
distortion
Longitudinal
Transverse
Manifold attachment faces


0,13 mm (0.005 in)
0,08 mm (0.003 in)
0,05 mm (0.002 in)
Min permissible depth of cylinder
head after refacing
Standard compression (early engines)
Standard compression (later engines)
Low compression


81,10 mm (3.193 in)
81,81 mm (3.221 in)
82,17 mm (3.235 in)

Oil Pump

Oil pressure (hot) at 3000 rpm 3,8 - 4,5 bar (55 - 65 lb/sq in)
Impellors - clearance
     End clearance in body
     Radial clearance in body
     Backlash between teeth
     Clearance on driven spindle
 
0,05 - 0,13 mm (0.002 - 0.005 in)
0,05 - 0,13 mm (0.002 - 0.005 in)
0,10 - 0,20 mm (0.004 - 0.008 in)
0,008 - 0,038 mm (0.003 - 0.0015 in)
Oil pressure relief valve
     Spring free length
     Spring load at 27,1 mm (1.66 in)
 
49,8 mm (1.96 in)
35.0 - 37.5 N

Camshaft

Number of bearings 3
Endfloat 0,05 - 0,23 mm (0.002 - 0.009 in)
Bearing clearance 0,025 - 0,064 mm (0.0010 - 0.0025 in)
Permissible dimension-cam
     Peak to base (min)
 
33,07 mm (1.302 in)

Crankshaft

  mm in
Endfloat 0,05 - 0,20 0.002 - 0.008
Big end diameter (standard) 46,487 - 46,505 1.8032 - 1.8310
Main bearing journal diameter (standard) 53,988 - 54,000 2.1255 - 2.1260

Pistons, Rings & Conrods

  mm in
Piston pin clearance (at 20°C) 0,009 - 0,014 0.00035 - 0.00055
Piston ring thickness (top to bottom face)
     Top & centre rings
 
1,96 - 1,98
 
0.077 - 0.078
Piston ring clearance in piston groove
     Top ring
     Center ring
 
0,048 - 0,099
0,041 - 0,091
 
0.0019 - 0.0039
0.0016 - 0.0036
Piston ring gap (in bore) 0,23 - 0,51 0.009 - 0.020

Cylinder Block

  mm in
Cylinder bore diameter (standard) 80,98 3.188

Tightening Torques

  kg m lb ft
Main bearing bolts 11,1 82
Big end bolts 3,4 25
Crankshaft pulley bolt 5,5 40
Flywheel manual 4,5 32
Cylinder head bolts 7,4 55
Camshaft sprocket bolt 4,8 35
Timing cover bolts 3,3 24
Camshaft thrust plate bolts 2,8 20
Oil pump to crankcase 2,8 20
Mainfold bolts 4,1 30
Engine front mountings 3,9 29
Engine rear mountings
     Mounting to transmission bolt
     Crossmember to body bracket bolts
 
4,5
4,0
 
32
28


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