Today’s vehicles are becoming more and more complex to service. Proper procedures are very important to follow when making repairs to today’s vehicles. This is especially true when working on Infiniti and Nissan dual mass flywheels.
2008-2012 Nissan 370Z 3.7L
2003-2007 Nissan 350Z 3.5L
2002-2006 Nissan Altima Nissan Maxima 3.5L
2005-2012 Nissan Xterra, Nissan Frontier 4.0L
2003-2007 Infiniti G35 3.5L
2008-2012 Infiniti G37 3.7L
The vehicles listed above have a crankshaft tone ring built into the flywheel. The dual mass flywheel is not indexed on the crankshaft and can be installed different ways.
When installed incorrectly, the vehicle may not start, have a check engine light, and the engine will not rev past 2,000 RPM.
When removing a dual mass flywheel from the vehicles listed above, it is recommended to make your own indexing marks on the flywheel and crankshaft. When installing the new flywheel, transfer your marks from the old flywheel to the new flywheel to ease installation and assure proper indexing. 
If you have already removed the flywheel and did not make any indexing marks, follow this procedure for proper installation:
1. With the flywheel removed, look for the alignment dowel pin hole on the end of the crankshaft.
2. On the new flywheel, find the same alignment dowel pin hole. This can be done by finding the locating hole and notch on the front side of the flywheel. (See Figure 2)
When you have located the notch and hole on the front side, flip the flywheel over and find the same hole that goes all the way through the back side.
3. When both have been located, align the two holes and torque the flywheel to the proper specifications.
Courtesy of Schaeffler Automotive Aftermarket, manufacturer of LuK Clutches.
