Page 241
A = Breaker point gap
S = Dwell angle
Gap A too narrow
Angle S too wide
Gap A too wide
Angle S too narrow
Gap A correct
Angle S correct
MEASURING DWELL ANGLE
8. Soak the lubricating felt in the distributor shaft
with oil and fit the rotor.
9. Fit cap and secure with the two retaining springs.
10. Connect a stroboscope and check the ignition set-
ting at starter speed or when running engine at max.
800 r/min. Remove vacuum hose for this check.
Adjust if necessary.
CAPACITOR
(Distributor removed)
Removal
1. Disconnect breaker arm lead.
2. Remove capacitor retaining screw. Remove capacitor
together with terminal.
Installation
1. Insert capacitor terminal in distributor housing and
screw capacitor in place.
2. Connect up breaker arm lead.
3. Check that the distributor cap does not touch the ca-
pacitor.
Febr 1977
VACUUM CHAMBER
(Distributor removed)
Removal
1. Remove the lock ring from the pivot for the vacuum
regulator control rod.
2. Back off the two vacuum regulator retaining screws
(one screw as from chassis No. 49.093 resp. 453.130)
and remove the regulator.
VACUUM CHAMBER
Installation
1. Hook the control rod onto the pivot and secure with
the lock ring,
2. Secure the vacuum regulator with the two screws (one
screw as from chassis No. 49.093 resp. 453.130
342-7
Page 242
hose.
nnect vacuum
3 ar ignition and check dwell angle at starter
f ur
Jmin and with the engine idling. Adjust if required.
4 pet: and adjust if required, the ignition setting at
i ; /min or with engine running at max. 800
bd
DISTRIBUTOR CAP
Removal
starter r
r/min.
1. Remove all ignition cables with rubber protectors
from cap.
2. Release retaining springs and remove cap.
NOTE
The distributor caps are of different design and
suits only the determined distributor.
installation
1. Position cap. Note that its position is determined by
the rear retaining spring. Secure cap with springs.
2. Connect up ignition cables in correct firing order.
CHECKING AND ADJUSTING THE IGNITION
SETTING MARKS FOR IGNITION SETTING
1. Connect the ignition service instrument or separate
dwell angle tester, tachometer and stroboscope.
5. If necessary, loosen retaining clamp and adjust igni-
tion setting by turning distributor housing (to the left
to advance the ignition, to the right to retard it). See
Group 0, Specifications, for correct values. Reconnect
vacuum hose. Adjust engine idling speed. Disconnect
the test instruments.
IGNITION SERVICE INSTRUMENT
342-8 SAAB
Febr 1977
Page 243
i
TESTING DISTRIBUTOR IN TEST BENCH
Test as instructed by manufacturer of test bench. See
table and ignition timing curves for correct test values
NOTE
1. Distributor speed is half the engine speed.
2. Camshaft angle is half the crankshaft angle.
Distributor settings when testing in a test bench
Degrees on distributor shaft
If the distributor is to be tested while still in the engine,
timing angle readings and speed readings shall be doubled
when compared with those valid when testing in test
bench. Moreover, engine vibrations may cause 2 certain
amount of deviation from these values.
a A
ra y
5° I
0° L ae
0 Bore ngn. Tf 1700) 2600 2500 r/min
0 100 200 300 400 500 mm Hg |
Fees pe pe ort FF Sc fl LOL a 0 a Ok b
pee oiemen2e 03 e405 06 ma
S 3546
CENTRIFUGAL AND VACUUM ADVANCE
DISTRIBUTOR 0 231 146 044 AND 0 231 146 024
Saab 95 up to and incl. chassis No. 46137
Saab 96 up to and incl. chassis No. 434173
Dwell angle 50 + 20
Contact pressure 3.9—5.2 N (400—530 p)
| = Centrifugal advance
We = Vacuum advance
Nov 1977
r/min = Distributor rev/min
mmHg
= Underpressure
342~9
Page 244
Degrees on distributor shaft
15° -
a et
10°
sea o
0° | ae oe
0 1000 1500 ae r/min
| |
0 100 200 300 400 500 mm Hg
Ce aaa bar
0 0] 02 03 04 0,5 06
S 3547
CENTRIFUGAL AND VACUUM ADVANCE
DISTRIBUTOR 0 231 146 033 AND 0 231 146072
Saab 95 chassis No. 46138—49092
Saab 96 chassis No. 434171—453129
Dwell angle 50 + 2°
Contact pressure 3.9-5.2 N (400—530 p)
| = Centrifugal advance r/min = Distributor rev/min
Il = Vacuum advance mmHg = Underpressure
Degrees on distributor shaft A
15° —
| 4
° AY —
10 >
\
5° a
y, at Ht
0° a
yy 1001500 20002500 +e min
|
0 100 200 300 400 500 mm Hg
SU Ff a a we
0 oO 02 03 4 os | «’ TT bar
CENTRIFUGAL AND VACUUM ADVANCE am
342—10
DISTRIBUTOR 0 231 146073
Saab 95 chassis No, 49093-62059
Saab 96 chassis No. 453130507018
Dwell angle 50 + 2°
Contact pressure 3.9—5.2 N (400—530 p)
| = Centrifugal advance
r/min
\| = Vacuum advance
mmHg
Distributor rev/min
Underpressure
SAE,
Nov 1977
Page 245
Degrees on distributor shaft &
15° |
| |
Li eT | ei
— La i; 4
10° asGuaee
' TY LT |
5
Laer AIAN |
Ye Bese 3 Va a
0° ae Se >
0 500 1000 1500 2000 2500 +/min
I !
0 100 200 300 400 mmHg
SL FN LY PL ay FET Se | i L | a) ta (Ge al ion as
0 gh Seger oseg4 «os 6 (Par
CENTRIFUGAL AND VACUUM ADVANCE S 3549
DISTRIBUTOR 0 231 146 084 AND 0 231 146 092
Saab 95 chassis No. 65001—95722006000
Saab 96 chassis No. 520001—96722017000
Dwell angle 50 + 3°
Contact pressure 4.9—6.2 N (S500—630 p)
| = Centrifugal advance r/min = Distributor rev/min
Il = Vacuum advance mmHg = Underpressure
I
Degrees on distributor shaft 15° 4 I
Pa |
I
a | 4 } |
—T i
: = Be! |
f= T ane
| | “T =
5° tt ae
7 fe a iW +
ep Win,
+ ] | ea ff fae
Pes a y |
0° < mS | \
= Ss
“54 3m 1000 1500 2000 ~=— 2500 r/min
0 100 200 300 400 mm Hg
0 4 8 12 16 inch Hg
Trt cet Trrerrrritity” par
Gora ee eS OS
ADVANCE
TRIFUGAL AND VACUUM
SISTRIBUTOR 0 231 167 039 AND 0 231 176 010
USA cars as from model 1971
Dwell angle 50 + 2°
Contact pressure 4.9-6.2 N (500-630 p)
Centrifugal advance r/min = Distributor rev/min
We mmHg = Underpressure
it = Vacuum advance
Nov 1977
342-11
Page 246
Degrees on distributor shaft
Degrees on distributor shaft
342-12
T |
—— T |
T { {| | [| | =e oie
7 i a 1 SaaS) oan aa — =
| | ia — |
T rT | P= | ie
’ SS | , ia”.
i | a if > >40 Bees eee oa I
Saas ig =. s ‘ia .eaS 32>
EO eer eeeeeess ea
cI = CCC
Li | |
| | aS. | a
=] =
= 7 Th wi Saas
: 4000 r/min
fr] 1000 2000 90 400
100 200 209 salad
S 5654
CENTRIFUGAL AND VACUUM ADVANCE
DISTRIBUTOR 0 231 170 031
Saab 95 chassis No. 95722006001—95752002048,
—95753003018, —95756000281
Saab 96 chassis No. 9672201 7001—96752015165,
—96756007419
Dwell angle 50 + 3°
Contact pressure 4.9—6.2 N (500—630 p)
| = Centrifugal advance r/min = Distributor rev/min
| = Vacuum advance mmHg = Underpressure
‘ LITT rt
1 | | CENTRIFUGALREGLERING
(CENTRIFUGAL ADVANCE =
adit }— Sts ay =z
el 2
—
7
f ‘A
eo" re
iE
rom a
= 2 Sait
5_| “4 4
if PEE
iif He
$ FH Se eeeeae
2 ts
$ $ Seeee eee
zat a
Fl ie =a SannGe
VARVTAL TANOFOROELARE-O/STRIOUTOR RPMn biel po
- amo r + + hee
c 7000 moo «oD + baba
VARVTAL VEVAXEL — CRANKSWAFT RPM — 9» “00 ec0 r
r 7000
t v0 a = = ome
= RS as aa % Ty
oe Re
CENTRIFUGAL AND VACUUM ADVANCE ai
DISTRIBUTOR 0 231 170 183
As from model 1976
Dwell angle 50 + 3°
Contact pressure 4.9—6.2 N (500-630 p)
| = Centrifugal advance r/min
= Distributor
11 = Vacuum advance mmH rev/min
9 = Underpressure
Nov 1977
Page 247
DELAY VALVE
DISTRIBUTOR WITH DOUBLE ACTING VACUUM
A delay valve is mounted in the vacuum passage between CONTROL UNIT
the carburetor and the vacuum control unit of the distri-
butor. The valve delays the formation of a vacuum by
around six seconds, The ignition advance is therefore also
delayed during acceleration and the emission of nitric
oxide (NO,) is reduced.
USA-Version as from model 1971
The distributor is equipped with a centrifugalregulator
which depending on engine speed controls the ignition
advance. The distributor has also a double acting vacu-
um regulator. The outer part of the vacuum regulator
(connection 2) is controlled by the underpressure that is
present just above the throttle and adjusts the ignition rel-
ative to engine speed.
The inner part of the vacuum regulator (connection 2) is
controlled by the underpressure that is present under the
throttle and gives ignition advance when the throttle is
closed. The hose is connected to the carburetor interme-
diate flange.
a The membran surface is bigger on the side which is in-
i
yin
.
TTT Lah
\ i
YT TL bho 3 ae ,
: at creasing the ignition advance when the underpressure is
equal in both vacuum lines.
DELAY VALVE
Checking
Checking is carried out by means of a stop watch, a tacho-
meter and a stroboscope.
1, Connect the tachometer and stroboscope.
2. Let the engine run at normal idling speed.
3. a. Have an assistant open the throttle valve suddenly
and let the engine run at around 3 000 r/min.
Take the time from the moment the throttle valve
was opened. ie
b. Check the firing point using the stroboscope light.
The vacuum regulator should cut ina
(+ two seconds) and the ignition adv
increased.
Faulty delay valve should be replaced.
fter six seconds
ance should be
10 i & toner | bey
$3103
DISTRIBUTOR WITH DOUBLE ACTING VACUUM CONTROL
UNIT
1. Connection for hose from the carburetor
CHECKING THE DELAY VALVE 2. Connection for hose from the intermediate flange
SAAB 342-13
Febr 1977
Page 248
IGNITION SETTING
It is very important, that the ignition setting is correct,
when both vacuum hoses are disconnected. Testing with
connected vacuum hoses shall be done to check that vacu-
um advance works properly.
\
| ar pe -* 4 ate ‘ evil
| ;
are i il ?
Page 249
SPARK PLUGS
REMOVAL
1. Disconnect ignition cable.
2. Blow cylinder head clean around spark plug
3. Unscrew spark plug, ,
INSTALLATION
1. Screw in spark plug by hand.
2. Tighten the plug with a torque wrench, 29-39 Nm
(3—4 kpm, 22—28 ft.-Ib.).
3. Connect ignition cable.
TEST
Spark plug removed
1. Clean spark plug by sandblasting.
2, Check gap and adjust, if necessary be bending the side
electrode.
3. Test spark plug under pressure in a spark plug tester.
Febr 1977
UL
nee
Page 250
SUPPRESSION OF INTERFERENCE
Car radio with installation kit is available as extra equip-
ment. The kit contains installation details and suppression
components necessary for normal installation. If the sup-
pression components does not work satisfactory the fol-
lowing completions may be made.
IGNITION INTERFERENCE
The car is delivered with suppressed rotor and suppressed
spark plug connections. As from engine No. ~ 242,000
are the engines equipped with resistance ignition cables
and resistor spark plugs. Resistor spark plugs are not nec-
essary but can in certain cases give better results.
Extra suppression can be made on the ignition coil + con-
nection (capacitor 2.2m1F).
ALTERNATOR INTERFERENCE
If alternator interference in the form of squeaks occur, a
capacitor (2.2 uF) can be installed of connection B+ on
the alternator.
REGULATOR INTERFERENCE
nce occurs on the medium vave band,
i fere
di ete i ter 0 290 002 011 can be installed at
Bosch suppression fil
the regulator.
WINDSHIELD WIPER MOTOR INTERFERENCE
Allowed completion on the windshield wiper motor:
Bosch No. 0 290 002 013 (normal suppression)
Beru FK 225 (when further suppression is needed).
S 5316
INSTALLATION OF SUPPRESSOR ON WINDSHIELD WIPER
MOTOR
346-1 SAAB
Febr 1977