Glow Plug

FridayParts Glow Plugs for Reliable Diesel Engine Starting

FridayParts is your trusted source for OEM-quality engine parts for off-road machinery. Our selection of glow plugs ensures your diesel engines start smoothly and operate efficiently, even in the coldest conditions. It can also be used for afterheating, which improves fuel and emissions performance. Now explore our diesel glow plugs at a lower price for routine maintenance or upgrades for enhanced performance.

The Crucial Role of a Diesel Glow Plug

A glow plug, a heating device, is used in diesel engines to aid in starting, especially in cold weather. It preheats the combustion chamber to ensure efficient ignition of the diesel fuel. When the engine is started, the glow plug heats up rapidly, providing the necessary temperature to ignite the diesel fuel. This rapid heating process is precisely managed by components like the glow plug controller and the glow plug timer, which work together to activate the glow plug relay at the correct moment. This helps the engine start smoothly and quickly, even in low temperatures. Plus, they can reduce cold start times, improve fuel efficiency, and minimize emissions.

Common Issues of Diesel Glow Plugs

Please note that these signs may cause your engine to break down:

1. Hard Starting: Particularly in cold weather, hard starting is an important sign that the glow plugs are malfunctioning or worn out.
2. Rough Idling: If the engine starts but idles roughly or inconsistently, this could indicate that not all cylinders are firing properly due to the plug being faulty.
3. Increased Emissions: The bad one can also cause incomplete combustion, leading to higher emissions and potentially failing emissions tests.
4. Decreased Fuel Efficiency: Incomplete combustion can also reduce fuel efficiency, causing the engine to use more fuel than necessary.
5. Engine Misfires: The engine may misfire during startup or when cold, indicating that some cylinders are not receiving adequate heat from the glow plugs.

Buy Diesel Engine Glow Plug at FridayParts

FridayParts knows the essential role of the glow plug in your engine, so we aim to offer the right and compatible engine spare parts. In this catalog, you can find our plugs tailored to meet the demands of various off-road machinery brands including Nissan, Bobcat, Hitachi, Kubota, Isuzu, Komatsu, etc. Whether you're working with a loader, an excavator, a forklift, or a tractor, you can use them with confidence.
Now explore more OEM-quality aftermarket parts solutions for your equipment. If you need other engine spare parts, you can view our category with 30,000 items for your consideration.

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Glow Plug FAQs

Can you drive with bad glow plugs?

You can drive short distances with a faulty glow plug, but it’s not recommended. It can cause cold starts, poor performance, lower fuel efficiency, and misfires. A flashing glow plug indicator on your dashboard signals a serious issue. Please drive carefully or tow.

What are the common brands of glow plugs?

Some of the most common and trusted brands for diesel glow plugs include: Bosch, NGK, Beru, Denso, Champion. Many of these brands are also Original Equipment Manufacturers (OEM) for major car companies.

Do all diesel engines use glow plugs?

No. Though most diesel engines in passenger cars, SUVs, and light trucks rely on glow plugs for cold starting, many diesel engines in large trucks and heavy equipment do not. They may use air intake heaters or simply start directly from high compression.

How often should glow plugs be replaced?

Glow plugs don’t have a set replacement interval. They usually last 60,000–100,000 miles (100,000–160,000 km) and are replaced when one fails—ideally all at once.