By RunningRoo Auto Parts — written from the desk of our Product Manager
The Nissan VQ35DE 3.5-litre V6 is one of the most successful engines of its era, powering the 350Z, Maxima, Murano, Pathfinder and a host of Infiniti models. It is smooth and strong, but its timing chain, tensioner and guides are a well-known wear point on higher-mileage cars, producing a rattle that is often mistaken for a valve-train problem. This guide covers the symptoms, the fitment details and the replacement.
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The VQ35 timing system
The VQ35DE uses a timing chain that drives both camshafts from the crankshaft, with a hydraulic tensioner and plastic guide rails. The chain, tensioner and guides wear with age, and the plastic guides in particular can become brittle and crack, producing the characteristic rattle as the chain slaps against the worn surfaces.
Because the VQ35 is an interference engine, a stretched chain or a failed tensioner that allows the timing to jump can cause severe valve damage, so a rattle should be investigated promptly.
The symptoms of a worn VQ35 chain
The classic symptom is a rattle from the front of the engine on a cold start, or a continuous rattle at idle that changes with engine speed. A worn chain can also cause rough running and fault codes for camshaft timing. The table below summarises the causes.
| Symptom | Likely cause | Check |
|---|---|---|
| Cold-start rattle | Tensioner or chain | Isolate the noise |
| Rattle at idle | Worn guides | Inspect the timing system |
| Timing correlation codes | Stretched chain | Measure correlation |
| Power loss | Chain or VVT | Scan codes |
Fitment and the right kit
The VQ35 was fitted to many models, and the timing chain kit differs slightly between applications and years, so confirm fitment by the engine code and the vehicle before ordering. A complete kit should include the chains, the tensioner, the guide rails and the sprockets, plus the seals needed to reseal the front cover.
Sending the VIN and engine code to the supplier confirms the correct kit, because the 350Z, Maxima, Murano and Pathfinder can use different kit variations.
The replacement in practice
The job starts with locking the crankshaft and camshafts, then removing the front cover to reach the chain. The old chain, tensioner and guides are removed, the new components fitted, and the engine turned by hand to confirm the timing before the cover goes back on with fresh seals and sealant.
This is an advanced job that requires the correct locking tools, so most owners buy a quality kit and have a Nissan specialist workshop fit it.
Which models use the VQ35
The VQ35DE powered a long list of Nissan and Infiniti models, including the 350Z, Maxima, Murano, Pathfinder, Navara and Skyline, plus the Infiniti G35, FX35 and M35. In Australia it is most familiar from the 350Z, Maxima and Murano, where it earned a reputation as a smooth and strong V6.
Because the engine spans many models and years, the timing chain kit can vary slightly between applications, which is why fitment is confirmed by engine code and VIN rather than by the model alone.
The guide rail problem
The VQ35’s plastic timing chain guides are one of its most common wear points. Over time they become brittle and can crack or shed their wear surface, which allows the chain to slap and produces the characteristic rattle. A worn guide also allows the chain to wander, which accelerates wear on the chain and sprockets.
Because the guides are cheap and the labour is already spent when the front cover is off, they are renewed as part of every timing chain kit. Reusing old guides is a false economy that leads to a repeat rattle.
Preventive maintenance for the VQ35
The VQ35’s best protection is regular oil changes with the correct specification oil, because the tensioner and guides are lubricated and cooled by engine oil. Addressing any rattle early is equally important, because the VQ35 is an interference engine and a jumped chain can cause catastrophic valve damage.
For a high-mileage 350Z, Maxima or Murano, budgeting for the timing chain and guides at the first sign of a rattle is the cheapest way to protect the engine.
VQ35 variants: DE, HR and VHR
The VQ35 badge covers several related engines, and the timing chain kit is not the same across all of them. The VQ35DE is the original dual-overhead-cam V6 found in the 350Z, Maxima and Murano, while the later VQ35HR and VQ35VHR are higher-revving versions with different timing layouts and, in many cases, more timing hardware.
| Variant | Typical applications | Timing note |
|---|---|---|
| VQ35DE | 350Z, Maxima, Murano, Pathfinder | Single chain per bank, guides a known wear point |
| VQ35HR | 350Z HR, some Infiniti | Dual intake and taller-rev design |
| VQ35VHR | 370Z, later Infiniti | VVEL and revised timing hardware |
This is why the kit must be matched by engine code and VIN, not just by the model. A 350Z could be a VQ35DE or a VQ35HR depending on the year, and the parts are not interchangeable.
Step-by-step VQ35 timing service
The VQ35 timing service is a disciplined, engine-open job that needs the correct locking tools.
| Stage | What the technician does |
|---|---|
| Prepare | Disconnect the battery, drain the coolant and remove the intake/accessories as needed |
| Set the timing | Bring the engine to the correct position and fit the crank and cam locking tools |
| Remove the front cover | Expose the chains, tensioners and guides |
| Replace the kit | Fit the new chains, updated tensioners, guides and sprockets |
| Inspect the VVT gears | Renew them where the engine is VVT-equipped and wear is visible |
| Verify and reseal | Turn the engine over by hand, then refit the cover with new seals and RTV |
The front cover is sealed with a combination of gaskets and RTV, so cleanliness and a correct sealant pattern matter as much as the timing itself.
What to check while the front cover is off
With the VQ35 front cover off, the extra checks are quick and cheap compared with the labour already spent. The plastic guides should be inspected for cracking or wear and renewed as part of the kit. The tensioner, oil pump drive and any VVT gears should be checked, and the old sealant surfaces cleaned carefully before the new RTV is applied.
If the engine has a history of low oil pressure or has been run with dirty oil, the oil pump and galleries are worth checking too. A new timing kit will not last if the oil supply that lubricates and tensions it is weak, which is why the VQ35’s oil-change history matters so much to the life of its timing system.
Key takeaways
The Nissan VQ35DE is a smooth, strong V6, but its timing chain, tensioner and plastic guides wear on higher-mileage cars, producing the characteristic rattle. Matching the kit by engine code and VIN, renewing the guides with the chain, and using the correct locking tools are the keys to a reliable repair.
For a high-mileage 350Z, Maxima or Murano, addressing a rattle early is the cheapest way to protect an engine that would otherwise risk severe valve damage.
Quick reference: the VQ35 timing service
Use this checklist when planning a VQ35 timing chain service:
- Confirm the rattle and read any timing codes.
- Record the engine code and VIN to confirm the correct kit.
- Renew the chain, tensioner, guides and sprockets as a complete kit.
- Inspect and renew the VVT gears on the VVT-equipped variants.
- Use the correct locking tools and torque sequence.
- Turn the engine over by hand before the first start.
A complete, correctly fitted service restores a quiet, correctly timed engine for years to come.
Frequently asked questions
Does the VQ35DE use a belt or chain?
It uses a timing chain, with a hydraulic tensioner and plastic guide rails.
What causes the VQ35 rattle?
Usually a worn tensioner or brittle, worn guide rails allowing the chain to slap.
Is the VQ35 chain a common failure?
The chain, tensioner and guides are a known wear point on higher-mileage VQ35 engines.
Should I replace the VVT gears with the chain?
On the VVT-equipped VQ variants, the gears are inspected and renewed if worn while the timing system is open.
Is the VQ35 an interference engine?
Yes, so a jumped chain can cause severe valve damage.
Which Nissans use the VQ35DE?
Mainly the 350Z, Maxima, Murano, Pathfinder, Navara and Skyline, plus several Infiniti models.
Why are the VQ35 guides a common failure?
The plastic guides become brittle with heat and age, cracking and allowing the chain to slap.
Is a VQ35DE kit the same as a VQ35HR kit?
No. The DE, HR and VHR variants have different timing layouts and hardware, so the kit must be matched by engine code and VIN.
Should I check the oil pump during the timing service?
Yes, especially on a high-mileage engine or one with a poor oil-change history, because the chain and tensioner depend on a healthy oil supply.
How long does a VQ35 timing chain service take?
It is usually a full-day job in a workshop, depending on the model and access, because the front cover and several accessories must be removed and the engine correctly resealed.
Can I reuse the old VQ35 chain guides?
No. The plastic guides are a known wear point and should be renewed as part of the kit whenever the timing system is opened.
What should I do if I hear the rattle for the first time?
Book a diagnosis promptly rather than waiting. Early attention to the chain, tensioner and guides is far cheaper than a jumped chain on an interference engine.
Is the VQ35 timing service a DIY job?
It is advanced and needs the correct locking tools, so most owners buy the kit and have a Nissan specialist fit it.
Shop the parts mentioned in this guide
- Timing Chain Kit for Nissan Teana J31 / J32 VQ23DE / VQ25DE / VQ35DE
- Timing Chain Set for Nissan 3.5L V6 VQ35 Maxima / G35 / 350Z with RTV
- 2x Intake Camshaft Sprockets for Nissan / Infiniti VQ35DE 3.5L / 4.0L V6
- Nissan Navara Duplex Timing Chain Kit 2.5 YD25 D40 / D22 — eBay
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RunningRoo Auto Parts – Based in Melbourne, Australia 🇦🇺
📞 Free 24/7 Pickup Available (Contact 0425890125)
💬 Any questions? Message or Call us anytime! We’re here to help.Why Choose RunningRoo?
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Sources and further reading
- Nissan VQ engine — Wikipedia
- Timing chain — Wikipedia
- RACV — car maintenance and repair guidance
- CarsGuide — Australian motoring advice
RunningRoo Auto Parts – Based in Melbourne, Australia 🇦🇺
📞 Free 24/7 Pickup Available (Contact 0425890125)
💬 Any questions? Message or Call us anytime! We’re here to help.Why Choose RunningRoo?
✅ Aussie Owned & Operated | 🚚 Fast Shipping | 🤝 Friendly Support