What indicates normal operation of a spark plug and what factors contribute to carbon fouling on Buick Regal?

A Spark Plug functions properly when it has a brown or grayish tan appearance accompanied by normal white powder residue from combustion by-products of additive-fueled engines. Carbon fouling forms as dry fluffy black soot when you use rich fuel mixture or experience leaking fuel injectors while running excessive fuel pressure or having restricted Air Filter elements or incorrect combustion. The ignition system voltage output becomes reduced when ignition coils weaken or ignition wires age or when a Spark Plug gap reaches improper dimensions. When vehicles stand still for too long or move at low speeds under minimal load the natural combustion byproducts cannot evaporate properly thus causing additional contamination inside the engine. A very white coating from oil coolant or additive substances like silicone causes spark intensity reduction through deposit fouling but normal powdery matter alone does not affect spark intensity unless it creates a glass-like layer on the electrode.

How to replace the spark plugs on Buick Regal?

Beginning the Spark Plug replacement process requires turning off the Ignition Switch followed by disassembly of the fuel injector sight shield. Start by removing the engine-based spark plugs along with disconnecting their Spark Plug Wires from the engine. A proper Spark Plug gap measurement should be taken before installation to verify the required specifications. Make adjustments to achieve the necessary gap. The installation torque for new cylinders should reach 27 nm (20 lb ft) but existing cylinders require a torque of 15 nm (11 lb ft). Plug the spark wires back in place before placing back the fuel injector shield.

OEM Buick Regal Spark Plug

Ignition Spark Plug

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Buick Regal Spark Plug Part Number: 12681664
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12568387, 25330840, 12565030, 25161444
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2004 Buick Regal | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
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Buick Regal Spark Plug Part Number: 12681658
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12617309, 12590701, 12620540
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2017 Buick Regal | Base, CXL, GS, Premium | 4 Cyl 2.0 L FLEX, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Buick Regal Spark Plug Part Number: 12681659
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12647827, 12626906
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2017 Buick Regal | Base, GS, Premium, Sport Touring | 4 Cyl 2.0 L GAS
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Buick Regal Spark Plug Part Number: 19302723
$2.81 MSRP: $5.02
You Save: $2.21 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaced by: 19354417
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2004 Buick Regal | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
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Buick Regal Spark Plug Part Number: 19300875
$7.71 MSRP: $13.76
You Save: $6.05 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 19208525, 19244468, 19158033, 19158029, 5614248, 5614235, 05614248, 19244463, 19207828, 05614235
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2004 Buick Regal | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
- 1990-1991 Buick Regal | 3.8L V6

Buick Regal Spark Plug

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A Spark Plug of Buick Regal vehicles is an essential device that is needed in the operation of the engine with the particularity of igniting the fuel/air mixture through creating electricity sparks. This is a spark plug that has central electrode, a metal terminal, ceramic insulation that is housed in a steel casing. Various kinds of spark plugs are available in the market such as copper core, platinum, iridium, and double platinum spark plugs required by the specific ignition system and engine necessities. The heat range, thread size, and reach of the spark plug are adjusted depending on the application to address the combustion process's requirements. Maintenance and replacement of spark plugs in your vehicle are crucial so as to avoid misfires, rough idle and slow acceleration so as to make the vehicles to be efficient and effective.

Buick Regal Spark Plug Parts and Q&A

Spark Plug
19300875
Q: What indicates normal operation of a spark plug and what factors contribute to carbon fouling on Buick Regal?
A:
A Spark Plug functions properly when it has a brown or grayish tan appearance accompanied by normal white powder residue from combustion by-products of additive-fueled engines. Carbon fouling forms as dry fluffy black soot when you use rich fuel mixture or experience leaking Fuel Injectors while running excessive fuel pressure or having restricted Air Filter elements or incorrect combustion. The ignition system voltage output becomes reduced when ignition coils weaken or ignition wires age or when a Spark Plug gap reaches improper dimensions. When vehicles stand still for too long or move at low speeds under minimal load the natural combustion byproducts cannot evaporate properly thus causing additional contamination inside the engine. A very white coating from oil coolant or additive substances like silicone causes spark intensity reduction through deposit fouling but normal powdery matter alone does not affect spark intensity unless it creates a glass-like layer on the electrode.
Spark Plug
12681664
Q: How to replace the spark plugs on Buick Regal?
A:
Beginning the Spark Plug replacement process requires turning off the Ignition Switch followed by disassembly of the fuel injector sight shield. Start by removing the engine-based spark plugs along with disconnecting their Spark Plug Wires from the engine. A proper Spark Plug gap measurement should be taken before installation to verify the required specifications. Make adjustments to achieve the necessary gap. The installation torque for new cylinders should reach 27 nm (20 lb ft) but existing cylinders require a torque of 15 nm (11 lb ft). Plug the spark wires back in place before placing back the fuel injector shield.