Reliability of 370z Vq37vhr with Upgraded Timing Chain and Arp Head Studs

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The Nissan 370Z, equipped with the VQ37VHR engine, is known for its impressive performance and driving experience. However, like any high-performance engine, reliability can sometimes be a concern. This article will explore the reliability of the 370Z VQ37VHR, particularly when upgraded with a timing chain and ARP head studs.

Understanding the VQ37VHR Engine

The VQ37VHR engine is a 3.7-liter V6 engine that powers the Nissan 370Z. It features a DOHC design and utilizes VVEL (Variable Valve Event and Lift) technology. This engine is known for its smooth power delivery and high-revving capabilities, making it a favorite among car enthusiasts.

Common Reliability Issues

While the VQ37VHR is generally reliable, some common issues can arise over time. Understanding these issues is essential for maintaining the engine’s performance and longevity.

  • Oil consumption: Some owners have reported higher than normal oil consumption.
  • Timing chain wear: The timing chain can stretch over time, leading to potential failure.
  • Overheating: Inadequate cooling can lead to overheating, particularly under heavy loads.

Upgrading the Timing Chain

Upgrading the timing chain is a significant modification that can enhance the reliability of the VQ37VHR engine. An upgraded timing chain can help prevent issues related to stretching and wear, ensuring that the engine runs smoothly over time.

Benefits of an Upgraded Timing Chain

  • Improved durability: Upgraded chains are often made from stronger materials.
  • Better performance: A reliable timing chain can enhance engine performance.
  • Reduced maintenance: Less frequent replacements can save time and money.

ARP Head Studs: An Essential Upgrade

ARP (Automotive Racing Products) head studs are a popular upgrade for the VQ37VHR engine. These head studs provide increased clamping force, which is crucial for maintaining head gasket integrity, especially under high-performance conditions.

Advantages of Using ARP Head Studs

  • Enhanced strength: ARP head studs are designed to withstand higher levels of stress.
  • Improved sealing: Better clamping force helps prevent head gasket failures.
  • Increased reliability: Overall engine reliability is improved with stronger fasteners.

Real-World Experiences

Many 370Z owners have shared their experiences with upgrading the timing chain and installing ARP head studs. These upgrades often lead to improved reliability and performance, especially for those who push their vehicles to the limit.

Owner Testimonials

  • “After upgrading to an ARP head stud kit and a new timing chain, my 370Z feels more responsive and stable at high RPMs.”
  • “I used to worry about oil consumption and overheating, but these upgrades have given me peace of mind.”
  • “The performance gains are noticeable, and I feel more confident during track days.”

Conclusion

The reliability of the Nissan 370Z VQ37VHR engine can be significantly enhanced with upgrades such as an improved timing chain and ARP head studs. These modifications not only address common reliability issues but also contribute to better overall performance. For enthusiasts looking to maximize their 370Z’s potential, these upgrades are well worth considering.