MSD 83921 HVC Professional Racing Distributor for Chevrolet Installation - Manual (Page 3)

INSTALLATION INSTRUCTIONS 
M S D I G N I T I O N • w w w . m s d i g n i t i o n . c o m • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA X ( 9 1 5 ) 8 5 7 - 3 3 4 4
1. Remove distributor
cap.
2. Remove the reluctor. Use
the installation/removal
tool PN 83492 to prevent
the shaft from turning
(Figure 7). Remove
the reluctor attaching
bolt using a 5/16", 12pt
deepwell socket.
3. Remove the two bolts
that retain the pickups.
4. Remove the four bolts
retaining the upper
housing and take it off.
5. Remove the distributor
gear and any spacers if
so equipped.
6. The upper bearing is
an interference fit and
needs to be heated to
be removed. Place the
lower housing and shaft
assembly in an oven at
300°F for approximately
30 minutes. When
heated, the shaft and
bearing assembly
should slide out of the aluminum housing. A slight tap on the shaft may be necessary.
7. If distributor is equipped with a lower bearing remove it while the housing is hot. If equipped with a lower
bushing, it can be replaced if necessary.
8. Remove and replace the two seals in the housing. The new seals install with their flat sides facing each
other. Lubricate the seals with grease (Figure 8).
9. Place the lower housing in an oven at 250° for approximately 30 minutes.
HOUSING
MSD 20793
CHEVY
PN 83921
SHAFT
ASY 27223
BEARING
HDW 20788
SEAL
HDW 10080
BUSHING
HDW 10081
SLIP
COLLAR
ASSEMBLY
(PN 8539)
SEAL
HDW 11143
HOUSING
MSD 20885
FORD
PN 83922
BEARING
HDW 20788
SHAFT
ASY 27224
SPACER
MSD 21553
BEARING
HDW 11142
SEAL
HDW 10080
HOUSING
MSD 21262
CHRYSLER
PN 83923
BEARING
HDW 20788
SHAFT
ASY 27225
SPACER
MSD 21717
SHIM
MSD 11082
BEARING
HDW 13913
HOUSING
MSD 27433
SEAL
HDW 11143
TOYOTA
PN 83924
BEARING
HDW 20788
SHAFT
ASY 27226
SPACER
MSD 27646
BEARING
HDW 11142
8-32 X 1.25 SHCS
SCW 15508
#8 WASHER
WAS 21181
PICKUP UPPER
SEE SERVICE
PARTS PAGE 2.
PICKUP LOWER
SEE SERVICE
PARTS PAGE 2.
#10 WASHER
WAS 21186
HOUSING
MSD 27231
ARP-STUD
SCW 27285
STRAIN RELIEF
HDW 21491
10-32 x .625 SHCS
SCW 11067
NUT-ECCENTRIC
MSD 27230
SCREW - PLASTITE
SCW 20311
COIL WIRE
RETAINER
MSD 25843
SEE SERVICE PARTS PAGE 2.
PN 8408 CAP AND
RETAINER KIT
SCREW
10-32 X 1.50 PAN-PHIL
SCW 20168
BOLT-DOWN
MSD 23940
WASHER
WAS 23066
10-32 X .625 SHCS
SCW 11067
CAP-A-DAPT
MSD 22256
HOLD-DOWN
MSD 22582
ROTOR
PN 8484
1/4 - 28 NUT
NUT 27286
RELUCTOR
MSD 27229
SEE SERVICE PARTS PAGE 2.
PN 8408 CAP AND
RETAINER KIT
Figure 5 Upper Housing Exploded Views.
Figure 6 Lower Housing Exploded Views.
HOUSING
MSD 20793
CHEVY
PN 83921
SHAFT
ASY 27223
BEARING
HDW 20788
SEAL
HDW 10080
BUSHING
HDW 10081
SLIP
COLLAR
ASSEMBLY
(PN 8539)
SEAL
HDW 11143
HOUSING
MSD 20885
FORD
PN 83922
BEARING
HDW 20788
SHAFT
ASY 27224
SPACER
MSD 21553
BEARING
HDW 11142
SEAL
HDW 10080
HOUSING
MSD 21262
CHRYSLER
PN 83923
BEARING
HDW 20788
SHAFT
ASY 27225
SPACER
MSD 21717
SHIM
MSD 11082
BEARING
HDW 13913
HOUSING
MSD 27443
SEAL
HDW 11143
TOYOTA
PN 83924
CHEVROLET R07
PN 83925
DODGE
PN 83926
BEARING
HDW 20788
SHAFT
ASY 27226
SPACER
MSD 27646
BEARING
HDW 11142
HOUSING
MSD 28865
SEAL
HDW 10080
BEARING
HDW 20788
SHAFT
ASY 27226
SPACER
MSD 27646
BEARING
HDW 13913
SEAL
HDW 10080
HOUSING
MSD 28156
BEARING
HDW 20788
SHAFT
ASY 28155
BUSHING
HDW 10081