Preheating candle (diesel)

Diesel Glow Candle: Indispensable for a car without a diesel license

The Glow plug Diesel is an essential part in the start of Cars without a diesel license. It is specifically designed to help diesel engines to reach a temperature conducive to combustion as soon as it is started, especially in cold weather. Without preheating candles in good condition, startups are laborious, more important exhaust fumes and accelerated engine wear.

Operation of the preheating candle in a diesel engine

The glow plug acts by heating the air of the combustion chamber before fuel injection. In a diesel engine, the fuel does not light up by spark as in gasoline engines, but by compression. So that the air mixture-Diesel ignites properly, the combustion chamber must already be heated. This is the role of the glow plug.

Main role

• Heat the combustion chamber to facilitate cold start.
• Reduce white smoke emissions in first engine laps.
• Improve the reactivity of the engine and limit the critics during repeated starts.
• Allow more complete combustion and less fuel loss.
• Preserve the life of the injectors and the injection system.

Diesel engines commonly concerned

The glow plugs proposed on Pro VSP address diesel engines such as Lombardini, Kubota, Yanmar, Mitsubishi and Perkins. Each engine uses a specific candle type (length, thread, resistance). Check compatibility is essential before any replacement.

When to control or replace your preheating candles

There are several signs that show that one or more candles are faulty. Regular checking makes it possible to avoid failed starts or additional damage to the motor.

Electrical or start-up signs

• Very slow or impossible start to cold.
• Abundant white smoke at the exhaust at startup.
• Preheating indicator that stays on longer than usual.
• Battery that empties quickly after startup.
• Odor of unburned fuel.

Mechanical or visual signs

• Candles fouled or with carbon deposits.
• Resistance out of tolerance during a multimeter test.
• damaged threads or traces of overheating.
• Oxidized or loose connectors.
• Irregular combustion at the first motor moments.

Maintenance and diagnosis of preheating candles

A good maintenance of the preheating system contributes to the longevity of the diesel engine and optimal operation. The diagnosis can be done-even or entrusted to a professional.

Diagnostic steps

• Visually check each candle.
• Measure the cold resistance with a multimeter.
• Check the preheating relay and its diet.
• Check the battery voltage.
• Observe the engine behavior at cold start.

Moment favorable for replacement

• When the engine requires several attempts to start.
• In case of large white smoke at startup.
• If one or more candles are off tolerances.
• After a high mileage or before winter.

Replacement of preheating candles

Replace the preheating candles properly is crucial for not damaging the engine or cylinder head threads.

Precautions before assembly

• Disconnect the battery.
• Cool the engine before disassembly.
• Use a suitable key and respect the tightening torques.
• Check that new candles match the engine specifications.
• Clean the candle well if necessary.

Assembly and test after replacement

• Mount the candles respecting the recommended torque.
• Reconnect the connectors correctly.
• Test preheating and start cold.
• Check for excessive smoke or failure.
• Check the battery voltage after startup.

Catalog Pro VSP : Diesel preheating candles

Pro VSP proposes Glow plugs Compatible with the main car diesel engines without a license: Lombardini, Kubota, Yanmar, Mitsubishi and Perkins. Our cards specify the dimensions and characteristics for a choice without error.

Associated parts

In case of replacement, also consider checking the preheating relay, the cables and the battery. For gasoline models, see our selection of Ignition candles.

Budget & Costs

The price of a preheating candle varies depending on the engine and the quality of the room. Add your hand-and possibly the replacement of the connectors or the relay if necessary.

Typical expenses

• Glow candle set.
• New connectors or cables.
• Preheating relay if faulty.
• Hand-to disassemble/wound.
• Start test after intervention.

Tips for extending life

• Keep the battery in good condition.
• Avoid unnecessary repeated starts.
• Clean the connectors to prevent oxidation.
• Replace complete play candles for homogeneous operation.
• Test the preheating relay regularly.

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