Distributor - Modified Drive Gear on Crankshaft
84porsche02Subject:
Distributor; Distributor Drive Gear on Crankshaft
Part Identifier 2830/1371
Applies To 911 CARRERA
1984 only
Group
28
Key Points Modified distributor for possible ignition timing deviation; Distributor drive gear installation procedure
(Supercedes P-Circular, Group 13, No. 83-04) C
Number
84-03
April 13, 1984
Ignition distributors in 911 Carreras are needed only for high voltage distribution.
Distributor adjustment is no longer necessary since ignition timing is triggered by the DME control unit.
Only a basic installation adjustment is required so the standard distributor, Part no. 930.602.023.00, does not have a slotted mounting flange.
Fixed distributor (without slot), basic installation adjustment
- turn engine to TDC in cylinder no. 1.
- mount distributor so center of rotor electrode points to notch in distributor housing.
With this fixed distributor, the rotor can only be positioned correctly when the distributor drive gear, Part no. 930.102.112.00, has been mounted correctly on the crankshaft.
Note
Installation position of the distributor drive gear was not checked on engines up to number 64 E 00127 930/21.
If the drive gear is improperly positioned, the distributor rotor angle will be incorrect (center of rotor electrode will not point to notch in housing with engine at TDC in cylinder no. 1).
Engines with this condition have a distributor equipped with slotted mounting flange. Distributor Part no. 930.602.923.00
Slotted distributor, basic installation adjustment
- turn engine to TDC in cylinder no. 1
- install distributor so center of rotor electrode is pointed as close as possible to notch in distributor housing.
- center rotor electrode exactly on distributor housing notch by rotating distributor in slot and tighten mounting bolt.
Note
Both style distributors are available as replacement pads
Distributor survey
Distributor without slot:
^ Part no. 930.602.023.00
^ Standard/replacement part for engines beginning with no. 64 E 00128
Distributor with slot:
^ Part no. 930.602.923.00
^ Standard/replacement for engines used since start of production 1984 to engine number 64 E 00127
Distributor drive gear, installing on crankshaft
During engine repairs check that distributor drive gear is correctly positioned on crankshaft.
- install gears marked only with Porsche trade emblem so that emblem faces V-belt drive pulley
- install gears marked with both a Porsche trade emblem and an X (scribed with an electric engraver) so that the X faces the V-belt drive pulley. Location of the Porsche emblem on these gears does not matter.
CAUTION
Incorrect installation of distributor drive gear will cause ignition timing to be off by approx. 13~.