This Genuine Nissan harmonic balancer bolt is a critical high-torque fastener for the TD42 engine, securing the harmonic balancer (crankshaft pulley) to the front of the crankshaft. As a single-use torque-to-yield (TTY) fastener, it is engineered to stretch when tightened to provide the correct and permanent clamping force required for this high-stress application.
This bolt must be replaced whenever the harmonic balancer is removed for service, such as during a front main seal replacement. Reusing a stretched TTY bolt will result in incorrect clamping force, which can lead to balancer wobble, shredded drive belts, and catastrophic damage to the crankshaft keyway and snout.
The primary challenge of this installation is the extremely high torque required to remove and refit the bolt, often exceeding 300 Nm. Access to heavy-duty tools, including a large breaker bar, a high-quality torque wrench, and a method for locking the engine, is essential. While replacing this bolt, it is highly recommended to inspect the condition of your harmonic balancer and drive belts.
Please check vehicle fitment to confirm compatibility with your vehicle. Please contact us with your VIN details if you require further assistance to confirm fitment.
Choosing Genuine Nissan parts ensures the highest quality and correct fitment for your vehicle. Unlike some aftermarket alternatives, Genuine Nissan parts are manufactured to exacting standards from materials specifically designed for durability and performance. This guarantees optimal service life and reliability for your Nissan.
