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1 Basic engine
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Engine 022-1
Technical data |
oe
Engine
sf General data
Type: B201 4-cylinder, 4-stroke engine with overhead
cam shaft
B202 4-cylinder, 4-stroke engine with twin
overhead camshafts
Cylinderbore mm {in) 90 (3.54)
Stroke mm(in) | 78(3.07)
Swept volume em? (in3) 1985 (121)
Firing order
(No.1 cylinder at rear) 1-3-4-2
Approximate weight, B201 kp (Ib) 140 (309)
B202 kg (Ib) 150 (331)
a Saab 900
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022-2 Engine
Performance, compression ratio, fuel
octane number, etc.
Engine Model Octane Suitable Compres- Rating (DIN), Torque
Variant Yeari Requirement slionforlead- ratiokW Nm (Ibfft)/
; RON(AKI)* free fuel (hp)/rpm = rpm
Single 81-84 Min 96 9.5 73(100)/5200 162(120)/3000
carburettor 85- Min 95 x
Twin 81-84 Min 96 9.5 79(108)/5200 164(120)/3300
carburettor
B201i 81-84 Min 96 9.5 87(118)/5500 167(124)/3000
85- Min 95 x
B201i with
catalytic 81- Min91(87) xX 9.25 81(110)/5250 161(119)/3000
converter
B202iwith 86- Min91 a '
eatalvlie Rec 95(91) x 10.1 96(130)/5500 173(4128)/3000
converter 7
B201Turbo, g1-82 Min98 7.2 107(145)/5000 235(174)/3000
(N/A APC)
B201Turbo 81-82 Min95(91) xX 7.2 99(135)/4800 217(160)/3500
(N/AAPC)
with
catalytic
converter is
B201Turbo 82-84 Min94
with APC J Rec 98 8.5 107(145)/5000 235(174)/3000
85 Min 91 xX
Rec 98
B201Turbo 86- Ming4 x 85 114/155)/5000 240(178)/3000
with APC Rec 98
B201Turbo 82- Min 91 (87) x 8.5 99(135)/4800 217(160)/3500
withAPC and 86 Rec 95 (91)
catalytic 87- Min91(87) x 8.5 103(140)/5000 235(174)/2500
converter Rec 95 (91)
B202Turbo = 84- Min 94. x 9.0 429(175)/5300 273(200)/3000
Rec 98
B202Turbo = 85- Min91{87) x 9.0 118(160)/5500 255(188)/3000
with cataly- Rec 95 (91)
tic converter : _—
B202Turbo 8 7- Min95(91) xX 9.0 121(165)/5500 265(195)/3000
SPG USAT*
The specified octane ratings are minimum
values and may deviate from those specified in
the Owner's Manual, as the ratings specified in
the latter are adapted to the quality of fuel avail-
able in the country concerned.
(US & CA)
*) AKI = MON + RON
2
Premium = 91 AKI
Regular = 87 AKI
**) Uprated B202 Turbo with catalytic converter
Saab 300
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Engine block |
3000
3300
3000
3000
1000 Cylinder head (B201)
_— Height of new cylinder head: mm {in) 92.75 + 0.05 (3.652 + 0.002)
i Minimum after regrinding: mmm (in) 92.35 + 0.05 (3.636 + 0.002)
500 Forcylinder heads that have been
reground, ahead gasket, 0.3mm
(0.012 in) thicker, is available
for H engines (M81 onwards).
000
800
500
500
300
00 Cylinder head (B202)
bee Height of new cylinder head: mm(in) | 4140.5+0.1(5.533 + 0.003) 4
Minimum after regrinding: mm (in) 140.1+0.1(5.516 + 0,004)
Saab $00
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>=
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022-4 Engine
Tightening sequence
Tightening torques
The specified torques applied to lubricated bolts
and washers and to new head gaskets.
Tightening torques for M17 cylinder head bolts:
Stage | Nm (bf ft) 60 (44)
Stage ll Nm (Ibf ft} 80 (59) —
Stage Ill Run the engine to normal temperature
and then allow it to. cool far 30 min
Stage lV Nim (lof ft) Slacken and thenretighten each bolt
to 95 (70) 7
Stage V Tighten a further quarter-turn (90°)
Tightening torques for M15 and TORX M12 head
bolts
(M87 and earller with cylinder head gasket
75 16 529 or 75 05 217)
Stage | Nm (Ibf ft) 60 (44)
Stage ll Nm (ibf ft) 80 (59)
Stage lll Run the engine to normal temperature
and then allow it to cool for 30 min
Stage lV Nm (Ibf ft) Slacken and then retighten each bolt
to 80 (59)
Stage V Tighten a further quarter-turn (90°)
Tightening torques for M15 and TORX M12 head
boits
(M88 onwards with cylinder head gasket
7561301 or 7585037)
Stage | Nm (Ibfft) | 60(44)
Stage II Nm (Ibf ft} 80 (59) 7
Stage Ill Tighten a further quarter-turn (90°)
Saab 500
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ee
Engine 022-5
Cylinder block |
Standard (A) ss mm(in) | 90.00-90.01 (3.543-3.544) _
Standard (B) mm (in) 90.01-90.02 (3.544 -3.544)
Firstoversize mm (in) 90.50 (3.563)
Second oversize mm (in) 91.00 (3,583)
Pistons
Make ; Mahle, Karl Schmidt or Hepolite
Piston speed (average) m/s (ft/s) 13 (39.7) at5000rpm
Pistons
z— The type of piston used varies with the compres-
—— sion ratio of the engine.
Engine Model Piston A, mm (in) Piston
year dia, mm (in) — weight, g (oz)
B201, Carb. 1981- 58 (2.28) 0,4 (0.016) 480-492 (17 .2-17.7)
B201| 1981- 58 (2.28) 0.4 (0.016) 480-492 (17.2-17.7)
B202) 1986- 64 (2.52) 1.0 (0.04) 504-516 (18, 1-18.6)
= B201, Turbo 1981 70 (2.76) 6.6 (0,260) 492-504 (17.7-18.1) \
— B201, TurboAPC 1982- 70 (2.76) 2.65 (0,104) 497-506 (17.8-18.2)
— B202, Turbo 1984- 64 (2.52) 4.7. (0.185) 514-526 (18.5-18.9)
— B202, Turbo 1986- 64 (2.52) 3.85 (0.152) 519-531 (18, 7-19.1)
Saab 900
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022-6 Engine
Piston diameter
Measured at right angles to gudgeon pin and:
- Mahle: 16 mm above lower edge
- Schmidt: 26 mm above lower edge
N.B.
Pistons of different makes must not be fitted in
the same engine.
Classification of pistons and cylinder bo-
res
The piston classification code is stamped on the
crown of the piston. The codes for servicing are:
AB
B
Cc
The cylinder classification code is punched on
the block adjacent to each cylinder.
Cylinders are either class A or B. Both classes
may occur in the same block,
Earlier classification
Turbo (Mahle)
Standard A (not spare part) mm (in) 89,960-89,970 (3.5417-3:5421)
StandardAB mm (in) 89, 970-89,976 (3.5421-3.5424)
Standard B mm (in) 89,976-89,986 (3.5424-3 5428)
Standard C mm (in) 89,986-90,002 (3.5428-3.5434)
First oversize (0.5mm) min (in) 90,460-90,475 (3.5614-3.5620}
Second oversize (1.0mm) mm (in) 90,960-90,975 (3.5811-3.581 7)
Piston clearance (nominal) mm (in) 0,024-0,050 (0.0009-0.0020)
Page 8
Engine
Other engines (Schmidt)
Standard A (nat Spare part) mm (in) 89,972-89 980 (3,5422-3.5425)
Standard AB mim (in) 89,980-89,986 (3.5425-3.5428)
Standard B mm (in) 89,986-89,994 (3.5426-3.5431)
Standard C mm (in) 89,994-90,010 (3.5431-3.5437)
First oversize (0.5mm) mm (in) 90,472-90, 487 (3.5619-3.5625)
Second oversize (1.0 mm} mm (in) 90,972-90 987 (3.5816-3.5822)
Piston clearance (nominal) mm(in) 0014-0040 (0,0006-0,0016) .
New classification
Turbo + carburettor (Mahle)
Standard A (not spare part) mm (in) 89,960-89,970 (3,5417-3.5421)
Standard AB mm(in) __ 89,970-89,978 (3.5421-3.5424) “.
Standard B mm (in) 89,978-89,986 (3.5424-3.5428) pass
Standard C mm (in) 89,986-90,002 (3.5428-3.5434)
First oversize (0.5mm) ~ mm(in) __90,460-90,475 (3.5614-3.5620)
Second oversize (1.0mm) mm (in) 90,960-90,975 (3.5811-3.5817)
Piston clearance (nominal) mm (in) 0,02-0,050 (0.0009-0.0020)
Turbo + injection (Mahle & Schmidt)
Standard A (not spare part) min (in) &89,978-89, 988 (3.5424-3.5428)
Standard AB mn (in) 89, 988-89, 996 (3,5428-3.54314)
Standard B mm fin) 89,996-90,004 (3.5431-3.5435)
Standard C mim {in} 90,004-90,020 (3.5435-3.5441)
First oversize (0.5 mm) mmm (in) 90,482-90,497 (3.5623-3.5629)
Second oversize (1.0 mm) mm (in) 90,982-90,997 (3.5820-3.5826) —
Piston clearance (nominal) mm (in) 0,004-0,032 (0.0002-0.0013)
Non-Turbo injection (Hepolite)
Standard A (not spare part) mm {in) 89,977-89,985 (3.5424-3.5427)
Standard AB mm(in) 89,985-89,9914 (3.5427-3.5430)
Standard B mm (in) 89,991-89,999 (3.5430-3.5433)
Standard C mm (in) 89,999-90,015 (3.5433-3.5439)
First oversize (0.5mm) mm {in} 90,477-90,492 (3:5621-3.5627)
Second oversize (1.0mm) mm (in) 90,977-90,992 (3,5818-3.5824) =
Piston clearance (nominal) mm (in) 0,009-0,035 (0.0004-0.0014)
Saab 900
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022-8 Engine
Resulting piston clearances
Earller classification
Piston/cylinder Clearance, 1/1000 mm
Schmidt Turbo
AVA 20-38 30-50
AB/A 14-30 24-40
AB/B 24-40 35-50
B/A 6-24 14-34
B/B - 8-34
New classification
Piston/cylinder Clearance, 1/1000 mm
Non-turbo Turbo
{Sohmidt) Carburettor)
AJA 12-32 30-50
AB/A 4-22 22-40
AB/B 14-32 32-50
B/A - 14-32
B/B 6-24 24-42
C/B - 8-34
Non-turbo
(Hepolite}
15-33
0-25
19-35
1-19
11-29
Piston rings
Top com- . Second
pression compres- Scraper
ring sionring ring
Width (thickness), mm (in) 1.73-1.75 1.98-1.99 2.63-2.73*
a (0.0681-0,.0689) (0,.0780-0.0783) (0.1035-0.1075)
Side clearance in mm (in) 0.050-0.082 0.040-0.072
groove (0.0020-0.0032) (0.0016-0.0028)
Working gap In new mm (in) 0.35-0.55 0.30-0.45 0.38-1.40**
cylinder, (0.0138-0.0217) (0.0118-0.017 7) (0.0150-0.0551)
* Segment width (thickness): 0.58-0.64 mm
(0.0028-0.0252 in)
** Applies to segment
Saab 900
Page 10
Engine 022-9
Gudgeon pins
Diameter: mm (in) 23,996-24.000 (0.9447-0.9449)
Fit mm (in) 0.005-0.014 (0.0002-0.0006) (sliding fit under
gentle thumb pressure)
Connecting rods
Diameter of big-end mm (in} 56.000-56.019 (2.2047-2.2055)
Diameter of small-end bush mm (in) 24,005-24.010 (0.9451-0.9453)
(fitted)
Maximum permissible ¢ (oz) 9 (0.32)
weight variation per set
Crankshaft
Maximum variation in straightness mim (in) 0.10 (0.0039)
End float mm (in) 0.08-0.28 (0.0031-0.0110)
Maximum journal out-of-
round - mm (in) 0.05 (0.0020)
Maximum taper of journals mm (inj 0.05 (0.0020)
Radius of main journal
fillet mm (in) 2.2-2.5 (0.0866-0.0984)
Main bearing clearance mm (in) 0.020-0.062 (0.0008-0.0024)
Big-end bearing clearance mm {in) 0.026-0.061 (0.0010-0.0024)
Colour markings of main bearing
and big-end bearing shells
Thin Thick
Standard _ Red Blue
Firstundersize Yellow Green §
Second undersize White Brown