V35A-FTS Spark Plug Replacement Guide – V35A-FTS spark plug change

Date October 26, 2025
Category
Car Tips, Auto Repair, Automotive Tips, Car Engines, Uncategorized
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V35A-FTS Spark Plug Replacement Guide – V35A-FTS spark plug change

V35A-FTS Spark Plug Replacement Guide – Replacing Spark Plugs & Buying V35A-FTS Engines

Being a mechanic or a do-it-yourself, you would realize that engine maintenance is what keeps it running in its top condition and providing life-long service. In V35A-FTS engine, one such very crucial maintenance job is spark plug changing of its. From buying a new V35A-FTS engine to engine repair, the manual has it all in between — be it replacement guides or specs. V35A-FTS spark plug change

We also stock V35A-FTS engines that can be purchased and installed as a new engine. Keep reading to find out how to make your V35A-FTS run like new and where to purchase a replacement engine that’s genuine.

1. An Introduction to the V35A-FTS Engine

V35A-FTS is Toyota’s 3.5-liter twin-turbo V6. It powers the majority of luxury vehicles, including Lexus LS500, Toyota Land Cruiser, and Lexus LX600. It is fuel-efficient and powerful, as much as raw power is involved, and it also features the latest tech and strength materials.

V35A-FTS Engine Specifications

SpecificationDETAIL
Engine CodeV35A-FTS
ConfigurationV6 Twin Turbocharged
Displacement3.5 Liters (3,445 cc)
AspirationTwin Turbo (Intercooled)
Fuel SystemD-4ST Direct & Port Fuel Injection
Horsepower409–420 HP @ 5,200–6,000 rpm
Torque479–520 Nm (354–405 lb-ft) @ 2,000–3,600 rpm
Compression Ratio10.5:1
ValvetrainDOHC, 24-Valve Dual VVT-i
Cooling SystemWater-cooled
Fuel TypePremium Unleaded Gasoline
Transmission Compatibility10-speed automatic
Weight~220 kg (dry)

The V35A-FTS engine is greatly acclaimed to be in perfect sync so far as power, smoothness, and fuel economy are concerned. Through the assistance of twin turbochargers and advanced D-4ST injection system, it delivers smooth throttle response without sacrificing good fuel economy.

We offer brand new and remanufactured V35A-FTS engines, tested for quality and performance, for direct replacement or performance improvement.

2. Why Spark Plug Maintenance Is So Important to the V35A-FTS Engine

Spark plugs are a cheap piece of hardware that are a vital component in your V35A-FTS engine. Spark plugs fire the air-fuel mixture, which creates the metered explosion that drives each cylinder. Spark plugs eventually wear out from heat, deposit, and electrode wear.

Worn-out spark plugs can cause:

  • Rough idling or misfire
  • Poor gas mileage
  • Slow acceleration
  • Tough starting
  • More emissions

Replacing your spark plugs at regular intervals (about every 60,000–80,000 km in the V35A-FTS) will have your engine running smoothly, with a good combustion and peak fuel efficiency.

3. Warning Signs of Worn or Failing Spark Plugs

The following are some of the typical signs that show that your V35A-FTS engine spark plugs have to be replaced:

  • Engine Misfires: Misfire and vibration on run due to impaired ignition.
  • Low Gas Mileage: Since the mixture is not being ignited by spark plugs, additional fuel is required.
  • Hard Cranking: When many cranks are required to spin over the engine, low-quality spark plugs are usually the cause.
  • Power Loss: Poor plugs siphon power away from responsiveness and acceleration.
  • Check Engine Light On: The V35A-FTS on new cars will certainly diagnose misfires and illuminate a warning light.

4. Spark Plug Replacement Tools and Materials Needed

Prior to going ahead with the process of replacing spark plugs, you may possibly need required materials and equipment:

Tools Needed

  • 10mm ratchet and socket
  • 14mm magnetic spark plug socket (optional)
  • Torque wrench
  • Extension bar
  • Feeler gauge
  • Anti-seize lubricant (optional)
  • Dielectric grease
  • Compressed air for cleaning

Replacement Parts

  • 6 spark plugs (recommended OEM: Denso FK20HR-A8 or equal)
  • Ignition coil bolts (left in position if still in good condition)
  • Coil pack seals in case you wish to replace them

5. Step-by-Step V35A-FTS Spark Plug Replacement Process

Replace your V35A-FTS spark plugs easily with this step-by-step process:

Step 1: Preparation

  • Position the car on a level surface and let the engine cool down entirely.
  • Disconnect the negative battery cable to prevent short circuiting by accident.
  • Disconnect the engine cover to reveal the spark plug wells and ignition coils.

Step 2: Remove Ignition Coils

  • Locate the ignition coils at the top of the cylinder head (three per bank).
  • Unplug each coil’s electrical connector.
  • Remove the 10mm screws retaining the coils with a loosening motion, followed by slow screw removal.

Step 3: Clean Spark Plug Wells

Use compressed air to blow out the spark plug wells. This is in an attempt to prevent the dirt from entering the cylinders when the plugs are removed.

Step 4: Remove Used Spark Plugs

  • Put spark plug socket and extension bar into spark plug well.
  • Back out used plugs counterclockwise.
  • Inspect used spark plugs for oil fouling or soiling — indications of potential engine problem.

Step 5: Spark Plug Gap Adjustment

Check gap on spark plug with feeler gauge before installation. V35A-FTS would normally be 0.044-inch (1.1 mm) gap. Adjust accordingly.

Step 6: Installing New Spark Plug

  • Apply light anti-seize coating on spark plug threads (optional).
  • Hand-install new spark plugs to avoid cross-threading.
  • Torque at 18 lb-ft (25 Nm) using torque wrench — don’t overtighten!

Step 7: Reinstalling Replaced Ignition Coils

  • Add small amount of dielectric grease to coil boot for extra insulation.
  • Install ignition coils and tighten 10mm bolts.
  • Install all coil electrical connectors.

Step 8: Final Assembly

  • Install engine cover.
  • Install negative terminal battery.
  • Start engine and verify for smooth, stable idle.

Everything is in good shape now, your V35A-FTS engine should be throttle-sensitive, smooth, and fuel-efficient.

6. Top Spark Plug Models for V35A-FTS

OEM high-quality components at spark plug replacement time are best. The following-recommended spark plugs are compatible with the V35A-FTS engine:

  • Denso FK20HR-A8 (OEM)
  • NGK ILZKAR8H8
  • Bosch Iridium Fusion (Premium Replacement)

These plugs come with an iridium tip, better ignition efficiency and longevity, and over 100,000 km life under ideal conditions.

7. Torque Specification and Plug Gap Summary

ComponentTorque SpecificationGap
Spark Plug18 lb-ft (25 Nm)0.044 in (1.1 mm)
Ignition Coil Bolts62 in-lb (7 Nm)—

Use correct torque. Over-torquing will ruin threads, while under-torquing will result in compression leaks and misfire.

8. Checks after Replacement

Installing your V35A-FTS engine spark plug:

  • Start engine and check idle speed.
  • Scan for misfire codes using an OBD2 scanner.
  • Road test vehicle for free throttle response and acceleration.
  • If vibration or check engine light is sensed, recheck plug torque and coil connections.

9. Maintenance Tips to Maximize Engine Life

Your V35A-FTS engine maintenance is not complete with spark plug replacement. Some tips to extract the best out of it are:

  • High-Quality Oil Only: 0W-20 or 5W-30 full synthetic oil with Toyota/Lexus spec. only.
  • Replace Air Filter: Clean burn with clean air.
  • Check Turbo Health: Twin turbos require clean oil and regular maintenance.
  • Avoid Low-Octane Fuel: Top-end unleaded (at least 91 RON) in all circumstances.
  • Run Regular Diagnostics: Run undercover performance issues diagnostics using an OBD2 scan tool.

10. Where to Purchase the V35A-FTS Engine

In case your V35A-FTS engine requires something more than spark plug replacement, or you want to replace, no worry, we are here.

We have 100% original and re-manufactured V35A-FTS engines, which are straight from Japan and re-manufactured according to OEM specification. Our engines are most suitable for Lexus and Toyota models and come tested and ready for installation.

Why Choose Us?

  • ✅ Your first choice for the top OEM Genuine V35A-FTS Engines
  • ✅ Compression-Tested and Inspected
  • ✅ Warranty Included
  • ✅ International Fast Shipping
  • ✅ Total After-Sales Services

Whether rebuilding an existing motor or moving to twin-turbo high-performance setup, our available V35A-FTS engines are your best bet.

Contact us now and grab the best offer on new rebuilt V35A-FTS engines — ready for immediate shipment!

11. Conclusion

The V35A-FTS spark plug replacement is easy using the correct tools, time, and information about your engine model. Keeping your spark plugs in check at the right time will assist in obtaining maximum performance, fuel mileage, and extended engine life.

And if your V35A-FTS engine needs more than a tune-up — no problem, we’ve got it covered. We’re seasoned V35A-FTS engine sellers, rebuilders, and international exporters, so you can be back on the road once more or rebuild again with ease.

Want to Sell Your Engine or Upgrade?

🚗 Purchase our V35A-FTS engines for sale today — high-performance, quality-checked, and ready to ship.

Reach out to our sales team via e-mail for technical support and quotes. Your engine needs the best — demand V35A-FTS quality and reliability today.

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