Spark Plug Replacement Rock Springs WY

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Green River & Rock Springs
(307) 875-8118
392 1%2F2 E%2C Fl aming Gorge Way
Green River, WY
Services
Auto Service & Repair, Auto Engine Rebuilding, Auto Transmissions
Hours
24 Hours 7 Days

Checker OReilly Auto Parts
(307) 362-1284
1265 Dewar Drive
Rock Springs, WY
Services
AC and Heating Repair,Clutch Repair

City Auto Sales
(307) 362-3741
960 Elk Street
Rock Springs, WY
Services
Clutch Repair

Wyoming Trucks Wholesale
(307) 352-6500
1503 Dewar Drive
Rock Springs, WY
Services
Clutch Repair,SUV Repair,Used Car Dealers,Auto Dealers

Wyoming Trucks & Cars
(307) 352-6500
Wyoming Trucks & Cars, 1503 Dewar Dr.
Rock Springs, WY
 
Overland Trail Transmission Company
(307) 352-6000
2515 Foothill Boulevard
Rock Springs, WY
 
Oasis Emission Consultants
(307) 382-3297
2730 Commercial Way
Rock Springs, WY
Services
Mufflers Repair

Plains Tire Company
(307) 382-5840
1155 Dewar Dr
Rock Springs, WY
Services
Car Washes, Car Detailing, Tire Shops

AAA Signs & Graphics
(307) 362-5762
110 Mesa Dr
Rock Springs, WY
Services
Auto Body

MacY''s Truck Repair Inc
(307) 362-6794
925 Stagecoach Dr
Rock Springs, WY
Services
Automotive Transmission

Removing and Replacing Spark Plugs

By Bill Siuru, PhD, PE   

Replacing the spark plugs are key part of a tune-up. Indeed, in modern vehicles with electronic fuel injection and electronic ignition systems, it may be the only procedure in a "tune-up." If your "CHECK ENGINE" light comes on, and an engine diagnosis indicates a "misfire", changing plugs is the first, and cheapest, place to start.

New spark plugs are pretty inexpensive, and unlike ones on older vehicles, can go many tens of thousands of miles before they should be replaced. Add to this the difficulty getting to spark plugs in today's engines, it is best to replace them, rather than clean and re-gap like in the old days.

Before removing sparks plugs, clean out any dirt or debris around the base of the plug that might fall into the combustion chamber and do damage to the engine. If available, use compressed air. If not, you can blow out the crud using a drinking straw or a small length of hose or tubing. Make sure to wear goggles to protect your eyes.

If the plugs have not been removed for a long time you might find one or two that are a bit tough to loosen. Allowing the engine to cool down often helps especially with aluminum cylinder heads. You might also soak the plug base with penetrating oil.

Using the correct size spark plug wrench, apply a steady pressure rather than jerky hammering to remove a stubborn plug. Be careful not to apply too much torque or too much impact force. You can shear off the top of the plug or strip the threads resulting in some real problems.

If the spark plug is especially difficult to screw out by hand after it is loose, carbon might have collected in the threads in the cylinder head. This condition is more common in older engines. The threads should be cleaned with a thread chaser before installing the new plug. The seat should be cleaned to insure good seat contact when you reinstall the plug.

Inspect each plug to detect any engine problems. They should have no more than a light gray or golden brown coating. Oil-soaked or sooty plugs are an indication of more serious mechanical problems such as a faulty fuel injection system or worn piston rings.

When replacing plugs you might consider precious metal spark plugs, for example platinum. While more expensive, they can go 50,000 miles or more before the next replacement. They are just the ticket for engines where a couple of the plugs are very difficult to get to.

Before installing new plugs, check the electrode gap to see if it is within specifications. The specs can be found in the owner's manual or on later models on the decal usually located on the underside of the hood. Use a wire-type spark plug gap-measuring tool.

If you use a bit of anti-seize compound, on the threads the plugs will be much easier to remove next time. It also ensures proper tightening and helps transfer heat between the engine and plug. If you have plugs with a sealing washer type gasket, make sure it is on the plug. Also make sure the...

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