What is the brand/model of the stock spark plug for an 04 V6 4 runner? Heat range? Gap?

hi they come preset u shouldn't have to set them if u buy from a dealer

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Inspect the electrodes and ceramic insulator.

• Burned or worn electrodes may be caused by:
  
  
  
  
  
  
  • Advanced ignition timing
  
  
  
  • Loose spark plug
  
  
  
  • Plug heat range too hot
  
  
  
  • Insufficient cooling
  
  
  
  

• Fouled plug may be caused by:
  
  
  
  
  
  
  • Retarded ignition timing
  
  
  
  • Oil in combustion chamber
  
  
  
  • Incorrect spark plug gap
  
  
  
  • Plug heat range too cold
  
  
  
  • Excessive idling/low speed running
  
  
  
  • Clogged air cleaner element
  
  
  
  • Deteriorated ignition coils
  
  
  
  

2.


Check the electrode gap (A). If the gap is over the standard, adjust the gap with suitable gapping tool.







Electrode Gap




Standard (New):


1.0-1.1 mm (0.039-0.043 in.)












3.


Replace the plug at the specified interval, or if the center electrode is rounded (A). Use only the spark plugs as listed.







Spark Plugs




NGK:


ZFR6K-11




DENSO:


KJ20DR-M11

Hello Nigel,

Here is a video for a spark plug replacement on a 1998 vauxhall astra mk4 sport 1.8 16v.

It should provide you with some good tips even though it is not the
exact same model as your inquiring about.
How to change spark plugs Vauxhall Astra Mk4

the gap is about 25th i say about as some modern vehicles use a a high tension compared to older models ,having the gap a bit either side will not cause any problems as such but an excessive wide gap will cause hard starting from cold ,and too closer gap can cause a slight sort of hesitancy

There is no best,you install what the manufacturer recommends

Check your owners manual and under the hood you may find the plug # on the
emission label as well as the plug setting (gap)

Any brand as long as it is the correct heat range and OE Configuration,not some
4 prong over advertised parts

Nowadays, I've seen spark plugs last 100,000 miles. The center electrode in a spark plug will wear down, causing a wider gap between the center electrode and side electrode. This wider gap causes harder starts, and if wear is too excessive, it will cause a no start. Hope this helps, Gary

The gap depends on which motor you have and what kind of plug. Irecommend staying with the original brand and number. My 2002 Impala w/ 3.8L has a 0.060" gap on it's plugs. According to Autozone, the gap for the 2005 3.4L or 3.8L is also 0.060".

For Mazda Car 2005-06 Spark Plugs...

Inspection
Inspect the electrodes and ceramic insulator.Burned or worn electrodes may be caused by:

Advanced ignition timing Loose spark plug Plug heat range too hot Insufficient cooling
Fouled plug may be caused by:
Retarded ignition timing Oil in combustion chamber Incorrect spark plug gap
Plug heat range too cold Excessive idling/low speed running Clogged air cleaner element Deteriorated ignition coils
Do not adjust the gap of platinum tip plugs; replace the spark plug if the gap is out of specification. The gap should be 0.049-0.053 in. on all models except Mazdaspeed6 or 0.028-0.031 on Mazdaspeed6 models.

1. Replace the plug at the specified interval or if the center electrode is rounded.
2. Apply a small quantity of anti-seize compound to the plug threads, and screw the plugs into the cylinder head finger-tight.

Removal & Installation

1. Before servicing the vehicle, refer to the precautions section.
2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Remove the plug hole plate by lifting off and removing the plug hole plate from the installation areas (rubber and clips) as shown in the illustration.
   
5. Remove the front suspension tower bar (joint).
6. Remove the ignition coils.
7. Remove the spark plugs.

To install:

1. Installation is the reverse of removal, tighten the plugs to 8-10 ft. lbs. (10-14 Nm).

2.3L (L3) Engine

1. Before servicing the vehicle, refer to the precautions section.
2. Disconnect the negative battery cable.
3. Remove the ignition coils.
4. Remove the spark plugs.

To install:

1. Installation is the reverse of removal, tighten the plugs to 8-10 ft. lbs. (10-14 Nm).

Mazdaspeed6

1. Before servicing the vehicle, refer to the precautions section.
2. Disconnect the negative battery cable.
3. If equipped with a turbocharger, remove the charge air cooler.
4. Remove the ignition coils.
5. Remove the spark plugs.

To install:

1. Installation is the reverse of removal, tighten the plugs to 79-177 inch lbs. (9-20 Nm).

Good luck(remember rated and comment this help).

Depending on what kind of brand you want, you can get the Bosch Platinum +2 for 4.99 a piece from autozone. Part #4301

383 is a modified engine...since it's not stock, you need to learn to "read" spark plugs. In reality the # used in any engine is a starting point for experimentation. Begin with factory plug, If too white or too black change heat range 'till you find a # that gives mostly white porcelan with light tan tinge. That will be a good plug to run.