Glow plugs are essential for starting and running a diesel engine efficiently. ClickMechanic offers mobile glow plug replacement with a lead time of 24-48 hours, depending on part availability. The service includes OEM-standard glow plugs, fitting, and disposal of old parts with a 12-month parts and labour warranty. Costs vary based on vehicle type and manufacturer specifications. If additional issues are found, a mechanic will provide a no-obligation quote for the correct repair.
What Do Glow Plugs Do? Originally used to assist in cold starts, glow plugs now heat the fuel/air mix to improve efficiency and reduce noise during engine warm-up.
How Do Glow Plugs Work?
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Each cylinder has one glow plug, controlled by a relay or vehicle’s computer module (BCM).
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When the ignition is switched on, current is sent to activate the glow plugs.
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A pre-heat plug warning light on the dashboard indicates the glow plugs are working.
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In some modern vehicles, glow plugs also include pressure sensors.
Signs That Glow Plugs Need Replacing:
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Glow plug warning light flashing when ignition is switched on.
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Engine management light (EML) on.
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Difficult cold starts.
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Increased fuel consumption during engine warm-up.
What Happens During a Glow Plug Replacement? A mechanic will:
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Pre-soak glow plug threads with penetrating oil to reduce the risk of breakage.
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Carefully remove the old glow plugs.
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Install new glow plugs.
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Start the engine and clear any error codes.
Important Notes:
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Glow plugs can be difficult to remove and may break.
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If a plug breaks, cylinder head removal may be required, which is not covered in the standard repair cost.
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If in doubt, contact ClickMechanic before booking.
What Does This Repair Cover? ✔ OEM-standard glow plugs and penetrating fluid ✔ Mobile fitting service (if applicable) ✔ Disposal of old glow plugs ✔ VAT (if applicable) ✔ 12-month parts and labour warranty
FAQs:
Can I Supply My Own Parts?
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No, unless they are brand-new from a dealership with proof of purchase.
What If the Mechanic Finds a Different Issue?
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The mechanic will offer a no-obligation quote for the correct repair.
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If you decline the repair, the booking will be changed to a diagnostic call-out.
What Happens If a Glow Plug Breaks?
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If a glow plug breaks during removal, cylinder head removal may be necessary, which is not covered in the repair cost.
Can I Prevent Glow Plug Breakage?
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Yes! Apply WD40 or penetrating oil around the glow plugs one day before the booking.
Can ClickMechanic Remove a Previously Broken Glow Plug?
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No, this is a complex engineering task, and we cannot provide a standard price for it.
How Do I Know If My Glow Plugs Have Sensors?
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If your vehicle has automatic stop/start, it likely has sensor-type glow plugs.
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If we suspect your vehicle requires them, you must complete a manual quote request form.
Does a Flashing Glow Plug Light Mean They Need Replacing?
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Not always! Some manufacturers use this as an engine fault warning.
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On Ford or Jaguar X-Type models, this can indicate low fuel pressure instead.
Associated Repairs:
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Glow plug relay replacement
How Much Does Glow Plug Replacement Cost? Pricing depends on your vehicle and manufacturer specifications. Get a custom quote here: 🔗 Glow Plug Replacement Quote
Alternative Ways Customers May Ask This Question:
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How much does it cost to replace glow plugs?
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What are the signs of faulty glow plugs?
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Can I get my glow plugs replaced at home?
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How long does glow plug replacement take?
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What does glow plug replacement include?
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Can glow plugs break during replacement?
For further assistance, visit ClickMechanic Help Centre.
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