What does a bad plug look like?

What does a bad plug look like?

Black, dry soot on the electrodes and insulator tip indicates a carbon-fouled plug. This can be caused by a dirty air filter, excessive driving at low speeds, too rich of a fuel/air mixture or idling your vehicle for too long.

Which type of spark plugs are used for heavy duty?

Denso Iridium Saver Spark Plugs Denso’s heavy-duty Iridium Spark Plugs bring quality, reliability and tremendous value to a wide range of industrial and CO-GEN applications.

What is the best type of 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.

When should I replace my NGK Spark Plugs?

NGK recommends that all spark plugs of a vehicle are removed for inspection every 10,000 km.

Are expensive spark plugs worth it?

If you want long-lasting plugs that will reduce the work you need to do replacing plugs and don’t mind paying extra for that luxury, yes. If you are designing an extremely high performance car where the plugs will be subjected to extreme conditions, they are probably a good idea.

How much should I spend on spark plugs?

The cost depends on the expected life and material used on the electrode. Platinum- or iridium-tipped plugs using laser technology cost the most: as much as $25 each. You can pay between $16 and $100 for a set of spark plugs, depending on the type of plugs you need and the number of cylinders your engine has.

Is it worth getting Iridium plugs?

It is estimated that iridium spark plugs will last for at least 60,000 miles. However, they’ve been known to go up to 80,000 miles, or even 120,000 miles, depending on the vehicle. So, an investment in these spark plugs would surely be worth it for this. You may never actually have these spark plugs go bad on you.