toyota spark plug gap chart


  • Ota 4.0 Liter Spark Plug Gap

    Gap 1.0 – 1.1 mm (0.039 – 0.043 in) Torque 20 Nm (15 lb-ft) DENSO K20HR-U11 NGK LFR6C-11 NOTE: Spark plug number, gap and torque may vary by model year. Confirm with your owner’s manual or shop manual

  • Ota 4.0 Liter Engine Specifications

    Cylinder block material Aluminum Cylinder head material Aluminum Fuel type Gasoline Fuel system Fuel injection Configuration V Number of cylinders 6 Valves per cylinder 4 Valvetrain layout DOHC Bore, mm 94.0 mm (3.7 in) Stroke, mm 95.0 mm (3.74 in) Displacement, cc 3,956 cc (241.4 cu in) Type of internal combustion engine Four-stroke, naturally asp...

  • Ota 4.0 Liter Engine Oil Specifications

    5W-30 Engine oil capacity, liter 5.2 (5.5 quarts) Oil change interval, mile 6,000 (10,000 km) or 12 month

  • Ota 4.0 Engine Applications

    Toyota 4Runner/Hilux Surf Toyota FJ Cruiser Toyota Hilux Toyota Land Cruiser 200 Toyota Land Cruiser Prado 120/150 Toyota Tacoma Toyota Tundra Toyota Fortuner Lexus GX 400

Do spark plugs need to be adjusted?

While plugs are pre-gapped from the factory, the gap may need to be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that higher compression or forced induction will typically require a smaller gap setting (to ensure ignitability under higher pressure).

Do spark plug gap sizes affect ionization?

Since the gap size has a direct effect on the voltage necessary to jump the gap and ionize (light) the air-fuel mixture, careful attention is required. While plugs are pre-gapped from the factory, the gap may need to be adjusted for the vehicle that the spark plug is intended for.

How do you index a spark plug?

Indexing is done by placing (usually copper) washers of varying thickness on the spark plug shoulder, so that when the spark plug is tightened, the plug will rotate a certain amount, and gap will point in the desired direction. In most engines, performance will improve when the spark plug gap opens toward the intake valve (s).

What size do Denso spark plugs come pre-gapped?

Some other Denso spark plug models do come pre-gapped to 0.9mm (0.354"). Did you get Denso SK16R11 or IK16 spark plugs, which are supposed to be pre-gapped to 1.1mm (0.433")?

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