Repairing the Nissan 370Z roadster's roof - a comprehensive DIY guide

The Nissan 370Z roadster, with its sleek design and thrilling performance, remains a coveted model for driving enthusiasts. However, owners may encounter issues with the roof mechanism that can dampen the driving experience. The problem often manifests as difficulty in opening or closing the roof, unusual noises during operation or uneven movement. These issues typically stem from wear and tear on the 5th Bow Bungee system, crucial for the smooth operation of the convertible top.

Understanding the issue
The 5th Bow Bungee system plays a pivotal role in the Nissan 370Z Roadster's roof mechanism, ensuring that the fabric folds correctly and tension is maintained for a snug fit when the roof is closed. Over time, the bungees can stretch or break, leading to improper folding of the roof, which can cause damage to the fabric or even affect the roof's mechanism. Recognising the signs early and addressing them promptly can prevent more significant problems down the line.

Parts and tools required
To address this issue, you'll need the 370z Nissan OEM 5th Bow Bungee kit - 971F6-1ET2A, designed specifically for the 370Z roadster. This repair might seem daunting, but with patience and the right tools, it's within the reach of those who have basic mechanical skills and are comfortable with DIY projects.

You'll need the following tools:

• T20 or T30 Torx key, depending on the model year
• Small flathead screwdriver
• Phillips screwdriver (noting that some Torx screws may have Phillips heads)
• Small needle nose pliers
• Panel trim removal kit (highly recommended to prevent damage to plastic components)
• Drill with 4mm and 5mm drill bits
• Rivet gun
• Torque wrench
• A precise measuring device like calipers

The repair process
The repair procedure is outlined in a detailed 77-step Nissan Service Bulletin, which provides a comprehensive guide through the process located here - 2010-2019 370Z; CONVERTIBLE SOFT TOP RUBS ON STORAGE LID WHEN OPENING/CLOSING

Here are some crucial points and tips to help you navigate the repair:

Weather stripping removal
During this step, you'll encounter a plastic tab that's designed for one-time use and will break upon removal. The replacement kit includes two of these tabs, ensuring you can proceed without a hitch.

Torx screw accessibility
Depending on your 370Z's production year, the placement of a specific Torx screw (referred to in step 12 of the Nissan Service Bulletin) may vary. Removing this screw can be challenging due to its placement, requiring patience and a bit of dexterity as if you're working blindfolded.

Drilling out old rivets
Step 14/15 involves removing the old rivet and sleeve. After drilling out the rivet, use a flathead screwdriver and hammer, followed by needle nose pliers, to remove the top of the rivet and then the sleeve. This step is crucial for preparing the area for the new bungee kit installation.

Tips for a 100% successful repair
• Take your time and follow each step of the service bulletin meticulously. Rushing through the process can lead to mistakes or damage to your vehicle.
• Organise your workspace and tools before starting the repair. Knowing where each tool is can save time and frustration.
• If at any point you feel uncomfortable with a step or unsure of your ability to complete the repair, consider seeking professional help. The cost of a mistake could outweigh the savings of a DIY approach.

Repairing the roof of your Nissan 370Z Roadster can restore the joy and functionality of your convertible, ensuring many more miles of open-top driving pleasure. With the right parts, tools and a detailed guide, this project is achievable for those who are handy and willing to invest the time. Remember, maintaining the integrity of your 370Z not only enhances your driving experience but also preserves the value and appeal of this iconic roadster.