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   What is a hot spark plug?

   • A "hot" spark plug has a longer insulator that prevents heat transfer into the water jackets. It keeps more heat in the tip of the spark plug, which helps burn off combustion chamber deposits. But if there's too much retained heat, the engine will experience preignition.

   10 Factors That Affect Correct Spark Plug Heat Range - MotorTrend

   www.motortrend.com/how-to/10-factors-that-affect-spark-plug-heat-range/

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   What is the difference between a hot and Cold Spark Plug?

   • A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. As a result, more heat stays in the ceramic firing end and less is dissipated to the engine. A colder heat range spark plug has an insulator design with a shorter heat flow path to the metal shell of the plug.

   Understanding Spark Plug Heat Range - NGK Spark Plugs

   ngksparkplugs.com/en/resources/understanding-spark-plug-heat-range

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   Do spark plugs have a heat range?

   • One of the most misunderstood aspects of spark plugs – is the heat range. One misconception is that the heat range is related to the spark temperature or intensity. Another common misconception is that the spark plug is designed as a heat sink to “remove” heat from the combustion chamber. These ideas are both false.

   Understanding Spark Plug Heat Range - NGK Spark Plugs

   ngksparkplugs.com/en/resources/understanding-spark-plug-heat-range

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   What does a spark plug do?

   • Spark plugs act as a heat exchanger, pulling thermal energy away from the combustion chamber and transferring it to the engine’s cooling system. What is Spark Plug Heat Range? A spark plug’s heat range is the degree to which it disperses heat.

   Choosing the Right Spark Plug Heat Range - Champion Auto Parts

   www.championautoparts.com/Technical/Tech-Tips/choosing-the-right-spark-plug-heat-range.html

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   What is a Cold Spark Plug?

   • A "cold" spark has a shorter insulator and retains less heat at the tip end—but if it's too cold, deposits accumulate and eventually the plug will short out (known as "fouling"). Spark plug heat range is the relative temperature of the spark plug's core nose. Critical factors involved in choosing the correct spark plug heat range include: 1.

   10 Factors That Affect Correct Spark Plug Heat Range - MotorTrend

   www.motortrend.com/how-to/10-factors-that-affect-spark-plug-heat-range/

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   What is a colder heat range spark plug?

   • As a result, more heat stays in the ceramic firing end and less is dissipated to the engine. A colder heat range spark plug has an insulator design with a shorter heat flow path to the metal shell of the plug. As a result, less heat stays in the ceramic firing end and more is dissipated to the engine.

   Understanding Spark Plug Heat Range - NGK Spark Plugs

   ngksparkplugs.com/en/resources/understanding-spark-plug-heat-range

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2. ngksparkplugs.com › en › resourcesUnderstanding Spark Plug Heat Range - NGK Spark Plugs

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   A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. As a result, more heat stays in the ceramic firing end and less is dissipated to the engine.

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3. www.championautoparts.com › Technical › Tech-TipsChoosing the Right Spark Plug Heat Range - Champion Auto Parts

   www.championautoparts.com › Technical › Tech-Tips

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   A spark plug's heat range is the degree to which it disperses heat. Find out what the appropriate heat range is for your particular spark plug!

   Automotive & Small Engine	General & Industrial Engines
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4. Videos

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     4:28

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     Cold vs Hot Spark Plugs - What's the difference? | Ignition & Beyond

     Oct 11, 2021

     28.1K Views

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     4:32

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     Hot vs Cold Spark Plugs (Explained)

     Jun 10, 2018

     9.8K Views

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     5:34

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     Spark Plug Heat Range Explained. Hot or Cold Plugs??

     May 3, 2019

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5. www.onallcylinders.com › 2018/05/11 › ask-away-jeffHow to Determine Correct Spark Plug Heat Range - OnAllCylinders

   www.onallcylinders.com › 2018/05/11 › ask-away-jeff

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   May 11, 2018 · Hot vs. Cold Spark Plugs. Let’s first define what is a hot versus a cold plug. Looking at a spark plug center ceramic insulator, if the area between the ceramic and the spark plug outer steel shell is deep, that is a hotter heat range plug.

6. www.motortrend.com › how-to › 10-factors-that-affect10 Factors That Affect Correct Spark Plug Heat Range - MotorTrend

   www.motortrend.com › how-to › 10-factors-that-affect

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   • Author: Marlan Davis

   • Video Duration: 4 min

   • Air/Fuel Mixture: Lean air/fuel ratios raise cylinder-head temperatures, requiring a colder plug. Rich air/fuel ratios require a hotter plug to prevent fouling.
   • Spark Advance: Ignition timing has one of the greatest effects on heat-range choice. Advancing timing raises combustion temperatures, calling for colder plugs.
   • Compression Ratio: Increasing the mechanical compression ratio raises cylinder pressure, resulting in higher cylinder temperatures. The higher the compression ratio, the colder the spark plug needs to be.
   • Gasoline Quality: With leaded fuels, the lead is attracted to the hotter (core-nose) part of the plug, causing glazing; running a slightly colder plug helps prevent this.

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8. www.autolite.com › media › wysiwygUnderstanding Spark Plug Heat Range - Autolite

   www.autolite.com › media › wysiwyg

   Autolite engineers have developed plugs in many heat ranges to suit all engine applications. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. Rules for selecting the correct plug are to follow manufacturer’s specifications. COLD MEDIUM HOT

9. wheelsbyjason.com › how-to-determine-spark-plugSpark Plug Heat Range: A Comprehensive Guide to Optimizing ...

   wheelsbyjason.com › how-to-determine-spark-plug

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   Oct 1, 2024 · A hot spark plug has a longer insulator nose and thicker insulator, resulting in less heat transfer from the combustion chamber, while a cold spark plug has a shorter insulator nose and thinner insulator, allowing for more heat transfer.

10. cartroubleshooters.com › what-is-the-heat-range-ofUnderstanding the Heat Range of a Spark Plug: Myths vs ...

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    Jun 28, 2024 · Discover the mysteries behind spark plug heat ranges in vehicles! Unravel how they impact heat dissipation, combustion efficiency, and engine durability. Learn to choose the right range to prevent pre-ignition troubles and enhance performance.