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Car ignition and preheating parts

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Ignition and preheating parts for car

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Glow plug system: parts for top car models

Ignition system car parts - all important information about operating method, mounting, diagnostics and service life

Ignition and preheating systems are directly involved in starting the engine and also perform different functions. The former is used in petrol engines and is designed to produce a spark that ignites the air-fuel mixture. The latter is used in diesel engines. Its main function is to heat up the air in the combustion chambers (swirl chamber or prechamber) to make starting a cold engine easier. This is especially important at low ambient temperatures.

Design of ignition and preheating systems

The operating principle of an ignition system consists in converting the low voltage of the onboard system into high voltage and producing a spark for ignition of the air-fuel mixture. The voltage is converted by an ignition coil. The current it creates is transferred to the distributor and then, through high-voltage cables, to the spark plug of the corresponding cylinder. A high voltage discharge is produced between the spark plug electrodes. The system also includes a relay and sometimes a contact breaker, which is also involved in controlling the system. Modern cars are often equipped with a distributorless ignition system (DIS) which has one ignition coil per spark plug and is connected to it directly, without any high voltage cables.

A preheating system has a different working principle. The glow plugs used in it are electric heating devices. Their operation is controlled either by a relay or by a separate control unit. When the glow plugs are on, the corresponding indicator lights up on the dashboard.

Maintenance tips

  • Make sure all cables and connectors are properly attached. For example, incorrectly connected high-voltage cables may cause the ignition coil, contact breaker, or other components to burn out.
  • Don’t leave the ignition on for a long time with the engine shut down. This may result in overheating of the coil, a burnt-out resistor, or a loosened contact breaker spring.
  • Don’t leave the engine idling for a long time. This results in increased build-up of soot on the spark plugs.
  • Observe the tightening torque specified by the manufacturer when installing new spark or glow plugs. Don’t apply too much force if the component gets stuck. This is especially true for glow plugs, which are easy to break. To remove them, the first thing to do is to grease the thread area with synthetic oil and leave it overnight. Then start the engine or supply power to the working components to let them warm up. After that, you may try to unscrew them, but remember to follow the recommended tightening torque. If you still can’t unscrew the components, heat them up again. Use a special reamer to clean glow plug holes.
  • Only use high-quality fuel. Otherwise, your spark or glow plugs will soon be covered with soot.

Signs of malfunction

Detecting ignition and preheating systems malfunctions is not that easy, as most of them have similar symptoms. For example, difficulties in starting a petrol engine or the inability to start it at all may indicate damaged high-voltage cables, a faulty ignition coil or spark plugs, a defective distributor cap or sensors, or a faulty timing advance mechanism or electronic control unit. All these issues may come with reduced engine power and increased fuel consumption.

No matter which component of the preheating system is faulty, all diesel vehicles have problems with starting a cold engine. The engine may idle rougher than usual.

Causes of malfunction

Low-quality fuel, wear and tear of piston rings and valve stem seals, or an incorrect ignition advance angle may cause soot deposits on the spark plugs. If power leads are damaged, the ignition coil may overheat. Malfunction of preheating system components might be caused by clogged fuel injectors. Furthermore, parts of ignition and preheating systems often fail due to voltage fluctuations in the vehicle’s electrical system.

autodoc.co.uk: only high-quality automotive products

You can buy components for ignition and preheating systems at our online shop. With the wide product range presented at our catalogue, you’ll find the right parts for your vehicle quickly and easily.

Replacement of Glow plug system car parts: Video repair guide

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Top 15 of best sellers from the Ignition and preheating section

Recommended spare parts from the Glow plug system section. These are the sales hits. Buy our best sellling items or discover a vast selection of other attractive offers.

Buy Ignition coil NGK 48041 - Glow plug system parts online

Evaluation

M.Z. 08.04.2024

Migliori bobine sul mercato visto il prezzo

E.A. 04.03.2024

Best price with high performance

Show all reviews
Parts Details
  • Number of pins: 4
  • Ignition Coil: Connector Type SAE
  • Number of inlets / outlets: 1
  • NGK: Ignition coil
  • Item number: 48041
  • Condition: New
Details
NGK U5014 Ignition coil
Article number: 48041
£ 29,95
price incl. 20% VAT, excl. delivery costs
Buy Ignition coil NGK 48206 - Ignition system parts online

Evaluation

B.S. 09.05.2024

excellent performance

T.L.S.C. 21.04.2024

NGK is a know good brand

Show all reviews
Parts Details
  • Number of pins: 3
  • Ignition Coil: Connector Type SAE
  • Number of inlets / outlets: 1
  • NGK: Ignition coil
  • Item number: 48206
  • Condition: New
Details
NGK U5055 Ignition coil
Article number: 48206
£ 28,67
price incl. 20% VAT, excl. delivery costs
Buy Spark plug NGK 3199 - Ignition and preheating parts online

Evaluation

Y.B. 02.02.2024

Very good spark plugs and the are Made in Japan, not like most of the NGK nowadays

S.V. 31.01.2023

The right spark plugs they are quality and specified for the engine

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Parts Details
  • Spanner Size: 16 mm
  • Spark Plug: Platinum Middle Electrode, 4 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,5
  • Thread Size: M14 x 1,25
  • NGK: Spark plug
  • Item number: 3199
  • Condition: New
Details
NGK BKR6EQUP Spark plug
Article number: 3199
£ 10,51
(Price per item)
price incl. 20% VAT, excl. delivery costs
Buy Spark plug NGK 95875 - Glow plug system parts online

Evaluation

P.P. 08.09.2021

I allway use ngk plug they last long

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Parts Details
  • Spanner Size: 14 mm
  • Spark Plug: Ring type connector (cup-shaped), Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 1 kOhm, with gasket seat
  • Thread Length [mm]: 26,5
  • Spark Position [mm]: 5,0
  • Thread Size: M12 x 1,25
  • NGK: Spark plug
  • Item number: 95875
  • Condition: New
Details
NGK SILZKFR8D7S Spark plug
Article number: 95875
£ 11,22
(Price per item)
price incl. 20% VAT, excl. delivery costs
Spark plug NGK 97153 - Ignition system spare parts order
Parts Details
  • Spanner Size: 16 mm
  • Spark Plug: Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 1 kOhm, with gasket seat, Fixed SAE connector
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 7,0
  • Thread Size: M14 x 1,25
  • NGK: Spark plug
  • Item number: 97153
  • Condition: New
Details
NGK IZFR6P7 Spark plug
Article number: 97153
£ 11,75
(Price per item)
price incl. 20% VAT, excl. delivery costs
Ignition coil NGK 48003 - Ignition and preheating spare parts order

Evaluation

V.B. 28.06.2023

it was recommended by professional

A.R. 27.02.2023

Good price and very good product

Show all reviews
Parts Details
  • Number of pins: 4
  • Ignition Coil: Connector Type SAE
  • Number of inlets / outlets: 1
  • NGK: Ignition coil
  • Item number: 48003
  • Condition: New
Details
NGK U5002 Ignition coil
Article number: 48003
£ 26,19
price incl. 20% VAT, excl. delivery costs
Mounting Tool, ignition coil HAZET 1849-7 - Glow plug system spare parts order
Parts Details
  • Net weight [kg]: 0,15
  • Length [mm]: 135
  • Material: Chrome Vanadium Steel, Plastic
  • Surface: Chromed
  • Tool handle type: T-Handle
  • HAZET: Mounting Tool, ignition coil
  • Item number: 1849-7
  • Our price: £ 52,60
  • Condition: New
Details
HAZET 1849-7 Mounting Tool, ignition coil
Article number: 1849-7
£ 52,60
price incl. 20% VAT, excl. delivery costs
Glow plug BOSCH 0 250 403 009 - Ignition system spare parts order

Evaluation

P.H. 16.05.2024

The website showed products specific 5o my vehicle's registration number.

S.H. 14.05.2024

I need it and ur the best site ❤️

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Parts Details
  • Supplementary Info: Duraterm
  • Thread Size: M 10 x 1
  • Length [mm]: 130
  • Voltage [V]: 4,4
  • Spanner Size: 10
  • Glow Plug Design: Rod Glow Plug
  • Fitting Depth [mm]: 28
  • Connector type: PIN
  • Tightening torque to [Nm]: 15
  • Tightening torque from [Nm]: 10
  • Cone Pitch: 63
  • Supplementary Article / Supplementary Info Info 2: without pressure sensor
  • BOSCH: Glow plug
  • Item number: 0 250 403 009
  • Condition: New
Details
BOSCH GLP194 Glow plug
Article number: 0 250 403 009
£ 11,68
(Price per item)
price incl. 20% VAT, excl. delivery costs
Ignition and preheating parts - Spark plug DENSO IK20TT

Evaluation

E.B. 13.02.2024

Great product and really good price

D.M. 20.08.2023

Best for Toyota Alphard on lpg

Show all reviews
Parts Details
  • Spanner Size: 16
  • Product line: Iridium TT
  • Spark Plug: 1 - Earthed Electrode, Platinum mass electrode
  • Thread Length [mm]: 19
  • Connector type: Solid SAE
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 43
  • Country Specific Design: Japan
  • DENSO: Spark plug
  • Item number: IK20TT
  • Condition: New
Details
DENSO 4702 Spark plug
Article number: IK20TT
£ 13,57
(Price per item)
price incl. 20% VAT, excl. delivery costs
Glow plug system parts - Spark plug DENSO IWF24
Parts Details
  • Spanner Size: 20.6
  • Product line: Iridium Power
  • Spark Plug: 1 - Earthed Electrode
  • Thread Length [mm]: 12,7
  • Connector type: Removable SAE
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 52
  • for OE number: J4520IWF24
  • Country Specific Design: Japan
  • DENSO: Spark plug
  • Item number: IWF24
  • Condition: New
Details
DENSO 5380 Spark plug
Article number: IWF24
£ 12,46
(Price per item)
price incl. 20% VAT, excl. delivery costs
-18%
Ignition system parts - Spark plug BERU Z365
Parts Details
  • Supplementary Info: ULTRA
  • Electrode Gap [mm]: 0,8
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Platinum Middle Electrode
  • Thread Length [mm]: 21,5
  • Thread Size: M12x1,25
  • Connector type: HS 6,4
  • Technical Information Number: 12 F-6 LPPR2L
  • Tightening torque from [Nm]: 15
  • Tightening torque to [Nm]: 25
  • Resistor from [kOhm]: 1
  • Resistor to [kOhm]: 2
  • BERU: Spark plug
  • Item number: Z365
  • Condition: New
Details
BERU 12 F-6 LPPR2L Spark plug
Article number: Z365
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 23,31
£ 18,92
(Price per item)
price incl. 20% VAT, excl. delivery costs
Ignition and preheating parts - Ignition coil NGK 48042

Evaluation

A.C. 07.10.2023

NGK is the only brand I trust!

Show all reviews
Parts Details
  • Number of pins: 4
  • Ignition Coil: Connector Type SAE
  • Number of inlets / outlets: 1
  • NGK: Ignition coil
  • Item number: 48042
  • Condition: New
Details
NGK U5015 Ignition coil
Article number: 48042
£ 31,75
price incl. 20% VAT, excl. delivery costs
Glow plug system parts - Ignition coil NGK 48010
Parts Details
  • Number of pins: 4
  • Ignition Coil: Connector Type M4
  • Number of inlets / outlets: 4
  • NGK: Ignition coil
  • Item number: 48010
  • Condition: New
Details
NGK U2003 Ignition coil
Article number: 48010
£ 53,84
price incl. 20% VAT, excl. delivery costs
Ignition system parts - Ignition coil DELPHI GN10401-12B1
Parts Details
  • Number of pins: 7
  • Voltage [V]: 12
  • Ignition Coil: Connector Type SAE
  • Plug Type: Female
  • DELPHI: Ignition coil
  • Item number: GN10401-12B1
  • Condition: New
Details
DELPHI GN10401 Ignition coil
Article number: GN10401-12B1
£ 104,93
price incl. 20% VAT, excl. delivery costs
Ignition and preheating parts - Spark plug NGK 6893
Parts Details
  • Spanner Size: 16 mm
  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 1 kOhm, with gasket seat, Fixed SAE connector
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 7,0
  • Thread Size: M14 x 1,25
  • NGK: Spark plug
  • Item number: 6893
  • Condition: New
Details
NGK ZFR5P-G Spark plug
Article number: 6893
£ 6,79
(Price per item)
price incl. 20% VAT, excl. delivery costs

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