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If you own an Infiniti G35 and are seeing oil seepage or smelling burning oil, a worn valve cover gasket is a common cause that you can address. Choosing the right Infiniti G35 valve cover gasket matters because the correct gasket restores a secure seal, prevents oil leaks, and helps maintain engine ventilation and performance.This guide shortlists the top valve cover gaskets for the Infiniti G35 based on fitment, sealing performance, material durability, and ease of installation. Below you will find the top picks and the criteria we used to evaluate them, followed by practical buying factors and FAQs to help you choose the right replacement.
Looking for other parts? See all Infiniti G35 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Sixity Auto Valve Cover Gasket Set for Infiniti G35 3.5L V6 (2003–2007) |  |
| Best quality Built to a higher standard if you want something more solid | BOXI Left & Right Engine Valve Covers with Gaskets for Nissan/Infiniti VQ35DE 3.5L |  |
| Best Value The sweet spot between price and what you get | Dtomi Engine Valve Cover Gasket Set for Nissan/Infiniti 3.5L and 4.0L V6 |  |
| Best budget The cheapest option that still gets the job done reliably | ZONFANT Valve Cover Gasket Set for Infiniti G35 (compatible) |  |
| Most popular A crowd favorite that many people choose with confidence | MITZONE Valve Cover Set with Gaskets, Bolts, Oil Cap, Spark Plug Tube Seals & PCV Valve for 2003–2007 Infiniti G35 (VQ35DE 3.5L) |  |
| Best Seller A high-volume bestseller chosen again and again | A-Premium Engine Valve Cover Kit with Gaskets and Bolts for Nissan/Infiniti VQ35DE 3.5L |  |
1. Sixity Auto Valve Cover Gasket Set for Infiniti G35 3.5L V6 (2003–2007)
| Material Type | Rubber |
|---|---|
| Compatible Models | Infiniti G35 2003-2007 3.5L V6 |
| Part Number | 4115989091 |
This Sixity Auto valve cover gasket set replaces the factory gaskets on Infiniti G35 3.5L V6 engines from 2003 to 2007. It is a molded rubber kit meant for routine valve cover gasket replacement during maintenance or when addressing oil leaks at the top of the engine. The set is sold as a direct replacement and includes gasket pieces shaped to fit the VQ35DE valve covers, which simplifies installation for a DIY mechanic or a technician. Molded rubber construction provides a resilient sealing surface that resists oil deterioration better than thin paper gaskets, and the kit arrives with the stated packaging and hardware to mirror factory fitment. Limitations are that this is an aftermarket single-vehicle fit part so you should confirm exact fit for your VIN and inspect mating surfaces during install; durability will depend on correct torque and cleaner surfaces during assembly. Expect a straightforward swap when replacing aged or leaking valve cover seals on the specified G35 engines.
Best for: Balanced all-round buyers who want a practical factory-replacement style gasket for routine maintenance or leak repairs on a 2003–2007 Infiniti G35 and value straightforward installation and cost-effective servicing.
Less Ideal for: Drivers seeking OEM-branded parts or long-term warranty-backed components should consider factory replacements or dealer-sourced gaskets instead.
- Molded rubber construction offers durable oil resistance compared with thin gasket materials
- Sold as a direct replacement shaped for the 3.5L V6 valve covers to simplify installation
- Includes packaging and hardware to help match factory-style fit during replacement
- Fits the VQ35DE-equipped Infiniti G35 model years 2003–2007 as specified
- Aftermarket part so fit and long-term durability can vary compared with factory parts
Verdict: A cost-effective molded rubber gasket set made to replace worn valve cover seals on Infiniti G35 3.5L V6 engines from 2003–2007.
2. BOXI Left & Right Engine Valve Covers with Gaskets for Nissan/Infiniti VQ35DE 3.5L
| Fits engines | VQ35DE 3.5L V6 |
|---|---|
| Compatible models | Infiniti G35, FX35, M35 and Nissan 350Z (specified years) |
| Includes | Left and right valve cover with gasket |
This BOXI kit supplies both left and right valve covers plus gaskets to replace the factory covers on VQ35DE 3.5L engines used in Infiniti G35 and related models. It is intended for routine replacement when covers are cracked or gaskets leak, and is installed in-line with normal head service or gasket jobs. The listing notes compatibility with 2003–2007 G35, 2003–2008 FX35, 2006–2008 M35 and 2003–2006 350Z and includes the matching gasket set so you get a ready-to-install pair. For performance-focused owners, the parts are presented as factory-spec replacements that should restore proper sealing and prevent oil leaks that can affect ignition and engine bay cleanliness. The kit does not include installation instructions, so professional installation or solid DIY experience is recommended. While the product aims to match OEM fit and function, buyers should verify the part numbers before purchase to ensure exact fitment for their engine variant.
Best for: Performance-oriented owners who prioritize restoring factory-level sealing and preventing oil-related issues on VQ35DE 3.5L engines during maintenance or performance rebuilds.
Less Ideal for: Buyers seeking a DIY kit with step-by-step instructions or those wanting upgraded performance covers with aftermarket features such as baffling or custom finishes.
- Includes both left and right valve covers plus gaskets for a complete replacement
- Designed to match factory part numbers for direct fit on VQ35DE 3.5L engines
- Helps eliminate oil leaks that can foul ignition components and engine bay areas
- Sold as a matched pair which simplifies a full-cover service without sourcing multiple parts
- No installation instructions are included, increasing reliance on professional fitment
- Manufacturer details and warranty are limited to a brief listing note rather than extended documentation
Verdict: A matched left-and-right valve cover and gasket kit aimed at performance-minded owners who need a factory-style replacement to stop leaks and restore engine sealing.
3. Dtomi Engine Valve Cover Gasket Set for Nissan/Infiniti 3.5L and 4.0L V6
| Part Number | Dto-GS-VS50608R |
|---|---|
| Fitment Type | Direct Replacement |
| Material | Rubber |
| Package | 2 gaskets |
This Dtomi valve cover gasket set supplies two rubber gaskets intended as direct replacements for a range of Nissan and Infiniti 3.5L and 4.0L V6 engines. Installation is typical for valve cover gasket work: remove the valve cover, clean sealing surfaces, fit the new elastomer-coated gaskets into the groove, and reinstall the cover. The gaskets are advertised as silicone/rubber with elastomer coating for oil and heat resistance and claim high conformability to imperfect surfaces to reduce leaks. Practical benefits include aftermarket availability for older VQ-series engines and a one-year quality support promise. Real-world notes from owners show many fits are correct and leak-free, but some users reported fitment and stretch issues where the gasket tore or required sealant. That means careful fit verification before installation and a cautious, patient install process are advisable. For DIY repairs the set offers strong value, but professional installers or rebuilds expecting perfect OEM tolerance should confirm fitment first.
Best for: Practical optimizers looking for a budget-friendly replacement gasket set to repair common oil leaks on older Infiniti G35 and similar V6 engines and who are willing to verify fit before installation.
Less Ideal for: Buyers seeking an exact factory-match part for a professional engine rebuild or those who cannot tolerate any risk of fitment variability should consider branded factory-quality replacements instead.
- Direct-replacement coverage for many Nissan and Infiniti 3.5L and 4.0L V6 applications
- Elastomer-coated rubber designed for oil, heat, and aging resistance
- Supplied as a pair to replace both valve cover gaskets during a service
- Advertised as highly conformable to imperfect sealing surfaces to reduce leaks
- Some customers reported inconsistent fit and material tearing during installation
- Material listed as plastic in one spec field which creates ambiguity about exact compound
Verdict: An economical, direct-replacement gasket set that fixes common valve cover leaks on many Nissan and Infiniti V6 engines while delivering strong value for DIY repairs.
4. ZONFANT Valve Cover Gasket Set for Infiniti G35 (compatible)
| Manufacturer | ZONFANT AUTO PARTS |
|---|---|
| Compatible Vehicles | Infiniti G35 (listed years and related VQ engines) |
| Replacement Part Numbers | VS50770R, VS50496, VS50848R and others |
| Warranty | 1 Year |
This ZONFANT valve cover gasket set is a direct-replacement style kit intended for VQ-series engines used in the Infiniti G35 model years listed by the manufacturer. It installs in the same location as the factory gaskets to seal the valve cover and prevent oil leaks that commonly develop with age. The kit claims OEM-equivalent fit and corrosion-resistant materials, which makes it suitable for a straightforward do-it-yourself replacement during routine maintenance or when diagnosing oil seepage around the valve cover. Practical benefits include a full set in one package and compatibility with common Infiniti G35 engine part numbers, so you can replace all gasket sealing points at once. Limitations are typical of value aftermarket parts: material longevity may vary versus higher-end branded replacements and exact fit can depend on prior engine condition and cleanliness during installation. Expect to verify fit against your vehicle and inspect sealing surfaces before final torqueing to ensure a reliable leak-free result.
Best for: Budget-conscious owners focused on restoring leak-free operation of an Infiniti G35 without paying for dealer parts and comfortable performing or supervising a routine gasket swap.
Less Ideal for: Those seeking the longest-lasting, top-tier factory-quality replacement or technicians wanting guaranteed fit certification for performance or show cars should consider higher-end or OEM-sourced gaskets.
- Sold as a complete valve cover gasket set for a one-time replacement job
- Designed to match factory-style sealing points for direct fit on compatible engines
- Materials described as corrosion-resistant to handle typical engine bay conditions
- Matches multiple replacement part numbers for easier cross-referencing
- Aftermarket materials may not match longevity of higher-end factory-quality gaskets
- Fit and sealing reliability can be sensitive to surface condition and installation technique
Verdict: A cost-effective full gasket set that lets G35 owners stop valve-cover oil leaks affordably, provided you accept typical aftermarket durability and ensure careful installation.
5. MITZONE Valve Cover Set with Gaskets, Bolts, Oil Cap, Spark Plug Tube Seals & PCV Valve for 2003–2007 Infiniti G35 (VQ35DE 3.5L)
| Compatible Engine | VQ35DE 3.5L |
|---|---|
| Fitment Years | 2003-2007 Infiniti G35 |
| Included Components | Valve covers, gaskets, bolts, oil cap, spark plug tube seals, PCV valve |
This is a full valve cover replacement kit intended for the VQ35DE-equipped Infiniti G35 that includes both driver and passenger covers plus gaskets, spark plug tube seals, bolts, an oil filler cap and a PCV valve preinstalled. It is designed for a straightforward swap when replacing leaking or damaged factory covers: the gaskets and tube seals come preinstalled to reduce assembly steps, and the package includes most small parts you would normally need during the job. Practical benefits include a near direct-fit for the G35 motor and the convenience of receiving a ready-to-install set that can stop oil leaks and restore proper sealing. Buyers should be aware of mixed quality notes from users: some report good fit and sealing, while others found paint overspray, loose casting debris inside the covers, or weak bolt threads that require using factory hardware. If you value an easy, do-it-yourself replacement, this kit covers the common needs but plan to inspect parts on arrival and consider swapping in your original bolts if they look better quality.
Best for: Convenience-driven Infiniti G35 owners who want a single, ready-to-install replacement package to fix valve cover leaks quickly without sourcing individual parts.
Less Ideal for: Owners seeking a showroom-finish cosmetic upgrade or a guaranteed factory-quality replacement should consider higher-end or OEM options and professional inspection before installation.
- Complete kit includes both valve covers, preinstalled gaskets and tube seals, PCV and oil cap so fewer additional parts are needed.
- Preinstalled seals speed installation and reduce time spent aligning gaskets during the job.
- Multiple purchasers report solid fit and effective sealing that eliminates oil leaks when installed correctly.
- Quality control can be inconsistent with reports of overspray, metal shavings inside covers, or imperfect castings.
- Supplied bolts have been reported as lower quality and may strip or cross-thread under torque.
- Paint finish is thin and prone to scratching during installation in tight engine bays.
Verdict: A convenient, full replacement kit that fixes common G35 valve cover leaks quickly, but inspect parts on arrival and be prepared to use better bolts or touch up the finish if you need longer-term durability.
6. A-Premium Engine Valve Cover Kit with Gaskets and Bolts for Nissan/Infiniti VQ35DE 3.5L
| Compatible Engines | V6 3.5L VQ35DE |
|---|---|
| Fitment | Infiniti G35 (2003-2007), FX35 (2003-2008), M35 (2006-2008), Nissan 350Z (2003-2008) |
| Package Includes | Left and right valve covers, gaskets, bolts, oil filler cap |
| Manufacturer | A-Premium |
This A-Premium valve cover kit replaces both left and right covers and ships with gaskets, spark plug seals, a set of bolts and an oil filler cap to address common VQ35DE issues like oil leaks and burning-oil smells. It is installed by removing the old covers, fitting the supplied gaskets and seals, and torquing the bolts to the recommended steps, which makes it a straightforward repair for a competent DIYer or a quick shop job. The practical benefit is a full sealing solution that often stops oil seepage around the cover base and ignition coil wells and restores a cleaner engine bay. Several reviews report accurate fitment and immediate improvement in leak symptoms. Limitations are typical of aftermarket cover kits: the plastic finish and long-term durability may not match factory-quality parts, and installers sometimes use RTV to keep gaskets aligned during assembly. The kit is best used as a cost-effective replacement to stop leaks and avoid more extensive engine work.
Best for: A cautious buyer who prioritizes a proven, low-risk repair to stop oil leaks on a VQ35DE-powered Infiniti G35 and prefers a complete kit that makes the job simple for their mechanic or an experienced DIYer.
Less Ideal for: Buyers seeking factory-grade materials or a long-term aesthetic match for a concours restoration should consider OEM or higher-end replacement options instead.
- Complete kit includes both left and right valve covers, gaskets, spark plug seals, bolts and oil filler cap
- Sold specifically for VQ35DE 3.5L engines used in Infiniti G35 and compatible Nissan models, improving fit confidence
- Supplied torque recommendations make installation straightforward for experienced DIYers or mechanics
- Multiple user reports of resolving oil leaks and reducing engine-bay smoke after installation
- Aftermarket plastic finish may not match factory-quality longevity
- Some installers recommend using RTV to keep gaskets in place, indicating fitment attention may be needed during install
Verdict: A full, budget-friendly valve cover kit that fixes common VQ35DE oil leaks and simplifies the repair, though it may not match factory material durability.
Choosing the Right Infiniti G35 Valve Cover Gasket: Key Factors to Consider
Material and Heat Resistance
The gasket material determines how well it resists oil, heat, and long-term compression set. Materials like multilayer rubber, high-quality silicone blends, or composite elastomers maintain elasticity at elevated engine temperatures and resist hardening or cracking over time.
A gasket that degrades with heat will allow seepage where the cover meets the head, so prioritize materials designed for continuous oil exposure and temperature cycles. Material choice also affects how the gasket conforms to surface imperfections and maintains a reliable seal after multiple heat cycles.
Correct Fitment and Dimensions
Accurate dimensions and hole placements are essential for a proper seal and to avoid interference with fasteners, PCV components, or spark plug wells. A gasket that is slightly off in shape or bolt-hole alignment can cause uneven clamping and localized leaks.
Look for gaskets specified for the Infiniti G35 engine variant you have, and check whether the product includes grommets or spark plug well seals when applicable. Proper fit reduces installation frustration and the need for repeated disassembly.
Sealing Design and Reinforcements
Gaskets differ in sealing profile, such as raised beads, molded lips, or integrated spark plug well seals. These design features concentrate sealing pressure in critical areas and help channel oil away from vulnerable joints.
Reinforcements like thicker sealing beads around bolt holes and molded corners help prevent blowouts and resist compression set. Consider designs that account for common stress points on the Infiniti G35 valve cover to improve long-term leak resistance.
Included Hardware and Installation Ease
Some gasket kits include essential items such as valve cover bolts, washers, or replacement grommets. Having the right hardware reduces the chance of reusing damaged fasteners that can cause uneven torque or poor clamping.
Kits that come with clear instructions and any necessary seals for PCV fittings make the replacement process smoother. Ease of installation matters whether you plan to do the job yourself or have a technician perform the work, because missing parts or unclear guidance can extend repair time and increase the risk of improper sealing.
Durability and Expected Service Life
Durability depends on material selection, resistance to oil and heat, and how well the gasket resists compression set. A longer-lasting gasket reduces the frequency of maintenance and the risk of intermittent leaks that can be hard to diagnose.
Consider manufacturer claims about lifespan alongside real-world feedback about how long gaskets maintain a seal under typical driving conditions. Choosing a gasket built for longevity can be more cost effective over multiple service intervals.
Compatibility with Engine Venting and PCV Components
The valve cover gasket must accommodate the engine's ventilation and PCV routing without restricting flow or allowing leaks around fittings. Proper sealing around PCV ports and breathers prevents vacuum leaks and oil mist escape, which can affect engine performance and cause external oil buildup.
Ensure the gasket design aligns with your engine's breather and PCV configuration so fittings sit flush and maintain a tight seal while preserving correct ventilation behavior.
How We Chose the Best Infiniti G35 Valve Cover Gasket
To assemble this list we focused on specifications and features that directly affect sealing performance and long-term reliability on the Infiniti G35. Key evaluation criteria included material composition and resistance to oil and heat, OEM-correct dimensions and fitment for G35 engines, design details that support crankcase ventilation and PCV routing, and included hardware or sealing enhancements such as molded bead profiles or reinforced sealing flanges. We also considered manufacturing tolerances and customer feedback related to leak resolution and longevity.Excluded from consideration were parts that did not explicitly list compatibility with the Infiniti G35 engine layout, one-off custom gaskets without reproducible specs, and products lacking clear material or dimensional data. The result is a selection of gaskets that prioritize correct fit, durable sealing under heat and oil exposure, and features that simplify a straightforward replacement.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common valve cover gasket symptoms on an Infiniti G35?
Common signs include oil seepage around the valve cover, oil pooling under the engine, a burning oil smell when the engine is hot, or visible oil on spark plug wells. Symptoms often develop gradually and may be more noticeable after extended driving or during hard acceleration.
How long does a valve cover gasket usually last before replacement is needed?
Lifespan varies with material quality and driving conditions, but many gaskets last several years under normal use. Factors such as high under-hood temperatures, frequent short trips, and exposure to contaminants can shorten service life, so check the gasket if you notice seepage or odor.
Can I replace the Infiniti G35 valve cover gasket myself?
If you have basic mechanical skills and the right tools, replacing the valve cover gasket is often a manageable DIY job. The task requires careful cleaning of sealing surfaces, correct torqueing of bolts, and attention to PCV and breather fittings. If you are unsure about torque specs or reassembly, consult a repair manual or a technician.
What causes valve cover gasket leaks besides material failure?
Leaks can result from over- or under-torqued bolts, warped valve covers, corrosion on mating surfaces, or improper installation that leaves debris in the sealing area. Ensuring clean, flat surfaces and correct fastener torque helps prevent leaks even with a good gasket.
Do I need to replace other parts when changing the valve cover gasket?
It is often wise to inspect related components such as valve cover bolts, washers, grommets, and spark plug well seals. Replacing brittle grommets or damaged hardware during the service reduces the chance of reinstallation issues and helps ensure a reliable seal.
Conclusion
When selecting an Infiniti G35 valve cover gasket, prioritize correct fitment, durable materials, and a sealing design that addresses common stress points. Consider kits that include necessary grommets or hardware to simplify installation and reduce the risk of installation-related leaks.Balance longevity and ease of installation against your comfort with DIY work. Addressing a leaking valve cover gasket promptly prevents oil contamination of engine components and helps maintain engine ventilation and performance.
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