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there was a TSB about that
New Alternator Pulley and Belt
©1998 Porsche Cars North America, Inc. Service Date: 2-5-98
Page 1 of 1
Binder - Service Technical Bulletins
This Bulletin replaces bulletin,
Group 1, # 7/97, dated 7-10-97
In case of alternator belt failure or belt noises in conjunction with pulley,
part number, 993 106 268 00 (s/s to 993 106 268 01), the alternator belt
and pulley must be replaced.
When repairs are necessary, install only the new version belt and pulley
halves.
Description Part Number
New belt (1 ea.) 999 192 372 50 (757 mm long)
Pulley halves (2 ea.) 993 106 268 01 (Yellow, chromated color) *
Shim (0.5 mm) 964 106 268 31 (as required)
Shim (0.7 mm) 964 106 268 32 (as required)
* The ratio of 2.68 to 1 remains unchanged.
911 Carrera:
The new version pulleys can also be installed on the 911 Carrera. However, the previous version belt
must be used.
Description Part Number
Previous belt (1 ea.) 999 192 343 50 (760 mm long)
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