801, 801.4, 801.5, 801.6, 801.8, 802, 802.4, 802.7, 803, 804, 805, 1CX, MINI CX, ROBOT, TELETRUK, TLT Forklifts
3CX, 4CX, JS Excavators, Loaders (depending on engine version)
A glow plug is a key component of a diesel engine's cold start system. Its function is to heat the combustion chamber to a temperature that allows for the self-ignition of injected fuel. If your machine is very hard to start in low temperatures, cranks for a long time, or emits white/grey smoke and runs rough for a while after starting, these are classic symptoms of a faulty plug. A malfunctioning pre-heating system leads to excessive wear on the battery and starter, and can completely prevent the engine from starting on frosty days.
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Original Equipment (OEM) Quality
Guarantee of durability and reliability
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Reliable Cold Starting
Fast and effective pre-heating
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High Durability
Resistant to engine operating conditions
A new plug eliminates problems with starting in low temperatures, ensuring your machine is ready for work every day.
An easier start means less strain on the starter motor and battery, significantly extending their service life.
A functional pre-heating system ensures smoother cold engine operation and reduces white smoke emissions after start-up.
Before starting any work on the electrical system, for your own safety, always disconnect the negative (-) terminal from the battery.
Glow plugs wear out at a similar rate. Replacing only one faulty plug is uneconomical and leads to uneven engine operation and another failure in a short time.
Before screwing in new plugs, thoroughly clean the bores and threads in the cylinder head of any carbon build-up. This ensures proper heat transfer and facilitates future replacement.
Glow plugs are delicate. Always tighten them with a torque wrench to the manufacturer's recommended specification. Overtightening risks shearing the plug off in the cylinder head.
Answer: It is the primary suspect. Other causes include a weak battery, a faulty starter motor, low engine compression, or a fuel system issue.
Question: How do I check if my glow plug is faulty?Answer: The easiest way is to check its resistance with a multimeter. A burnt-out plug will show an open circuit. You can also check if voltage is present on the power lead when the ignition is turned on.
Question: How often should I replace glow plugs?Answer: There is no fixed interval. They should be replaced when starting problems occur. The best practice is to replace the full set to ensure even heating of all cylinders.
If you are unsure whether the selected product is suitable for your machine, contact us and we will help you choose the right part and provide practical advice in minutes.
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