911 GT3 RS (997) F6-3.6L (2007)
Flywheel: Technical Service Bulletins
M/T - Dual Mass Flywheel Precautions
GT3 Engine: Flywheel and Pulley
Vehicle Type:
911 GT3 (997)
Model Year:
As of 2007
Concerns:
Flywheel and pulley
INFORMATION:
Replacing dual-mass flywheel with single-mass flywheel.
We have discovered that the dual-mass flywheel, which is installed as standard in the GT3 engine (vehicle type 997810/-811), is being replaced in the
dealer organization with the single-mass flywheel from the GT3 RS engine (vehicle type 997850/-851).
INFORMATION: Due to an increasing number of reported faults, we expressly wish to point out that the installation of the single-mass flywheel
(from the GT3 RS) in the GT3 engine is not approved by Porsche.
Since the 911 GT3 (997) engine application is designed for the dual-mass flywheel, conversion to the single-mass flywheel results in the following
problems and consequences:
-
The single-mass flywheel causes fluctuations and vibration in the lower rpm range, thereby reducing the smooth-running performance of the
engine.
-
The crankshaft is subjected to one-sided loading, causing stress peaks that can result in damage to the crankshaft.
-
The one-sided loading of the crankshaft can cause the pulley to come loose, resulting in damage to the belt drive and engine.
-
Any damage relating to conversion or damage that can be attributed to conversion is not covered under warranty.
Please advise your customers of this information accordingly.
Disclaimer