911 Carrera 4 Cabriolet AWD F6-3600cc 3.6L SOHC (1990)
Harmonic Balancer - Crankshaft Pulley: Technical Service Bulletins
Crankshaft Pulley - Excessive Run-Out After Installation
May 8, 1990
Subject: Crankshaft Pulley Run-Out Checking
Model
Group
911 C2,C4
1
Part Identifier
Number
1376
9013
ATTENTION: Service Manager/Service Technician
Models Affected:
911 Carrera 2 and 911 Carrera 4
Concern:
Excessive crankshaft pulley run-out after installation.
Repair Information:
The contact area between the crankshaft pulley and crankshaft is tapered. Depending on tolerances, the
crankshaft pulley run-out could be excessive even when torqued properly. During engine repairs requiring pulley
removal, the run-out should be checked and corrected if necessary after installation of the pulley while the
engine is still out of the vehicle. Refer to the 911 Carrera 2/4 Workshop Manual Volume 1, pages 13-37 and
13-38 for crankshaft pulley installation and straightening procedures.