What is a solid spark plug?

The top of a spark plug contains a terminal, which serves as a connector to the ignition system. … Plugs with a solid terminal nut can only be used with the larger, snap-on connector type. The terminal is part of the plugs design and cannot be removed.

What is an NGK solid spark plug?

NGK Spark Plugs – Solid Tip. Multi-Ground Electrodes Improve Ignition Capabilities and are Less Sensitive to Increased Voltage Requirements Due to Gap Growth. Designed to Specific Manufacturer Ignition Requirements, NGK’s Multi-Ground Plugs Maintain All the Features of Their Standard Plugs.

What are the two types of spark plugs?

Spark plug types

  • Copper spark plugs. Copper spark plugs have a copper core and use a nickel alloy on the working end of the electrode–the part that generates a spark. …
  • Platinum spark plugs. …
  • Iridium spark plugs. …
  • Pulstar spark plugs. …
  • Reducing emissions with every spark plug.
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Do you need to lubricate spark plugs?

Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.

Are all spark plug terminals the same size?

Replacement spark plugs must be the same size as the original (same hex size, diameter, thread pitch and length), and have a similar “heat range” (hot enough to resist fouling when the plug is cold, and cool enough to resist pre-ignition when the plug is hot).

What goes on top of a spark plug?

At the top of the spark plug sits the connector, or terminal. This is where the spark plug wire attaches. The terminal connects inside the plug to the copper core of the center electrode, which is surrounded by insulation. Next comes the hex head.

What is on top of a spark plug?

A central electrode that carries the current runs the entire length of the spark plug. The spark plug wires (if applicable – older technology) or the ignition coil connects to the top of the spark plug’s electrode. A ceramic insulator separates the electrode from the rest of the spark plug.

Which is better iridium or platinum spark plug?

Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.

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How do I know if I have iridium spark plugs?

5 Signs That Your Spark Plugs Are Fake

  1. Look at the top of your spark plug. There is a slight hollow in the top of NGK spark plugs. …
  2. Check your spark plugs’ threads and stamps. …
  3. Check the alignment of the brand name. …
  4. Check for a number on the hex nut. …
  5. Look closely at the packaging.


What’s the best spark plugs for horsepower?

Best Spark Plugs for Horsepower

  • Denso (4504) PK20TT.
  • NGK 3403 G-Power.
  • ACDelco 41-962.
  • NGK Iridium IX.
  • ACDelco 9748RR Wires.


Can Vaseline be used as dielectric grease?

Vaseline can work as a substitute for dielectric grease, the big differences are that it can degrade rubber and plastics over time, and it’s combustible – but I’ve used it in the past on car bulbs, wiring and battery terminals and it hasn’t been a problem yet.

What happens if you don’t gap your spark plugs?

While a gap that is too wide may not allow the ignition system to fire the plug at all. Spark plugs that are not gapped properly will cause the engine to either skip firing, or ignite too soon in the compression stroke. Properly gapped spark plugs also remove heat from the cylinder ignition chamber.

How tight should you tighten spark plugs?

Tighten the spark plug finger-tight until the gasket reaches the cylinder head, then tighten about ½ – ⅔ turn more with a spark plug wrench. (Taper seat: About 1/16 turn more.)

Does spark plug size matter?

A plugs hex size determines the socket required for installation. Remember to take into consideration not only the diameter of the cylinder head, but also the added thickness of the plug socket needed for installation. …

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Can a spark plug wire be too long?

The resistance of a longer wire isn’t really an issue. Unless you were mounting the coil at the other end of the vehicle. Ideally you want to keep them as short as possible.

Does it matter what spark plug wire goes where?

Connect all the spark plug wires

It can be different and it will be if your car has more than 4 cylinders. Anyway, the point and the step are always the same. You need to connect the wires according to the firing order on the distributor. The first spark plug is already connected.