How to Built VQ35DE Timing System

The VQ35DE engine, produced by Nissan, is widely known for its performance and reliability. Found in popular models like the Nissan 350Z, Infiniti G35, and Altima SE-R, the engine has earned a strong reputation in the automotive world. However, one of the most critical aspects of maintaining and upgrading this engine is ensuring a properly Built VQ35DE Timing.

If you’re planning to rebuild or upgrade your VQ35DE timing system, this guide will walk you through the importance of timing, common issues, step-by-step installation, and expert tips to get the best performance and longevity from your engine.

Why Is Timing Important in the VQ35DE Engine?

The timing system in any internal combustion engine ensures that the crankshaft and camshafts rotate in perfect synchronization. This is crucial for:

• Optimal Power Delivery: Ensuring that the air-fuel mixture ignites at the right time.
• Preventing Engine Damage: Incorrect timing can lead to valve-piston collisions, causing catastrophic engine failure.
• Fuel Efficiency: Poor timing reduces combustion efficiency, leading to higher fuel consumption.

Common Issues with the Built VQ35DE Timing

Like any high-performance engine, the VQ35DE is not without its weaknesses. Some common timing system issues include:

1. Timing Chain Rattle: Over time, the timing chain tensioners and guides wear out, leading to a rattling noise, especially on cold starts.
2. Stretched Timing Chain: A worn-out or stretched timing chain can throw off camshaft timing, reducing performance and increasing fuel consumption.
3. Failing Timing Chain Tensioners: The hydraulic timing chain tensioners can fail due to low oil pressure, leading to slack in the chain and inaccurate valve timing.
4. Broken Chain Guides: Plastic chain guides wear down, causing instability in the chain system.

If left unattended, these issues can result in serious engine damage, requiring costly repairs.

Step-by-Step Guide to Building a Reliable VQ35DE Timing System

Before starting, make sure you have the correct parts and tools.

Required Parts:

✅ Timing Chain Kit (OEM or Upgraded Aftermarket)
✅ Timing Chain Guides
✅ Timing Chain Tensioners
✅ Crankshaft and Camshaft Sprockets
✅ New Front Cover Gasket and Seals
✅ Fresh Engine Oil

Required Tools:

🔧 Torque Wrench
🔧 Ratchet and Socket Set
🔧 Harmonic Balancer Puller
🔧 Camshaft Holding Tool
🔧 Breaker Bar

Step 1: Prepare the Engine

1. Disconnect the Battery to prevent accidental starts.
2. Drain Engine Oil and remove the front timing cover.
3. Remove the Accessory Belts and harmonic balancer using a puller tool.
4. Position the Engine at TDC (Top Dead Center) on the compression stroke of cylinder 1.

Step 2: Remove the Old Timing System

1. Loosen the Timing Chain Tensioners to relieve slack in the chain.
2. Remove the Timing Chain carefully, ensuring not to rotate the crankshaft or camshafts.
3. Inspect the Sprockets, Guides, and Tensioners for wear and replace them if necessary.

Step 3: Install the New Timing System

1. Align the New Timing Chain using the factory timing marks.
2. Install the Crankshaft Sprocket and make sure it meshes properly with the lower timing chain.
3. Attach the Camshaft Sprockets and align them with the chain guides.
4. Install New Timing Chain Tensioners and verify they have proper oil pressure.
5. Check for Proper Chain Tension by rotating the engine manually using a breaker bar.

Step 4: Reassemble and Test the Engine

1. Reinstall the Timing Cover with a new gasket and apply RTV sealant where needed.
2. Reinstall the Harmonic Balancer and tighten it to factory torque specifications.
3. Refill Engine Oil and connect the battery.
4. Start the Engine and Check for Any Unusual Noises—if it sounds smooth, your timing system is properly installed!

Pro Tips for a Bulletproof VQ35DE Timing System

✔ Use High-Quality Parts – Stick with OEM or reputable aftermarket timing components like Gates or Cloyes.
✔ Check for Oil Pressure Issues – Poor oil pressure can cause tensioner failure, leading to chain slack.
✔ Perform Regular Maintenance – Change oil every 3,000–5,000 miles to prevent sludge buildup.
✔ Consider an Upgraded Oil Pump – Helps keep tensioners properly pressurized.
✔ Double-Check Timing Marks – Even a small misalignment can cause performance loss or engine damage.

Frequently Asked Questions (FAQs)

1. How long does a VQ35DE timing chain last?

A properly maintained VQ35DE timing chain can last 150,000 to 200,000 miles. However, tensioners and guides may wear out sooner and need replacement around 100,000 miles.

2. What are the signs of a failing timing chain on a VQ35DE?

⚠ Rattling noise on startup
⚠ Check Engine Light (P0011 or P0016 codes)
⚠ Loss of power and misfires
⚠ Rough idling and hesitation

3. Can I replace the VQ35DE timing chain without removing the engine?

Yes, you can replace the timing chain without removing the engine. However, you will need to remove the front timing cover, which requires some disassembly.

4. Should I replace the timing chain or upgrade to a stronger one?

For stock or lightly modified engines, an OEM timing chain is sufficient. If you’re pushing high RPMs or forced induction, consider an upgraded performance timing chain.

5. How much does it cost to replace a VQ35DE timing chain?

• DIY Replacement: $300–$700 (parts only)
• Professional Installation: $1,000–$2,500 (parts and labor)

Final Thoughts: Keep Your VQ35DE Running Strong

A well-built VQ35DE timing system ensures smooth performance, reliability, and longevity for your engine. By using high-quality components, following proper installation procedures, and performing regular maintenance, you can keep your Nissan 350Z, Infiniti G35, or Altima SE-R running at peak performance.

If you’re experiencing timing-related issues, don’t ignore the warning signs—address them early to prevent costly engine damage. With this comprehensive guide, you now have the knowledge to build a bulletproof VQ35DE timing system.