what is the difference between a hot and cold spark plug?
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*When a spark plug is referred to as a “cold plug”, it is one that transfers heat rapidly from the firing tip into the engine head, keeping the firing tip cooler. *A “hot plug” has a much slower rate of heat transfer, which keeps the firing tip hotter.
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Cold starts cannot be avoided when the engine is cold and you need the car. However a cold start causes more wear than a warm start, and you cannot rev the engine too high unless the oil is warm enough. ... This will most certainly ruin your car over time.
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Spark plug sockets come in two sizes: 5/8 inches and 13/16 inches. Most spark plug sockets have a rubber insert that holds the plug snugly in place. You may also need a universal joint if your spark plugs are difficult to reach.
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The difference is Heat Range, RCJ8Y is Hot, RCJ6Y Cold. Heat Range indicates the ability of spark plug to reach self-cleaning temperature to prevent carbon fouling. ... If the engine manual recommends a RCJ6Y, but the only replacement available is RCJ7Y, I would use it.
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Spark plugs in automobiles generally have a gap between 0.6 and 1.8 mm (0.024 and 0.071 in). The gap may require adjustment from the out-of-the-box gap. A spark plug gap gauge is a disc with a sloping edge, or with round wires of precise diameters, and is used to measure the gap.
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Conventional spark plugs need to be replaced every 30,000-50,000 miles. Long-life (iridium- or platinum-tipped) spark plugs need to be changed between 60,000 and 150,000 miles, depending on the vehicle.
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The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. ... The letter “J” indicates a 12 mm x 1.25 size with two ground electrodes. The “P” indicates a projected tip spark plug design that moves the spark deeper into the combustion chamber.
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A block heater warms the engine coolant, which warms the engine block and the oil. Plugging in your car before you start it can also lower your car's emissions — and your gasoline bill, says Natural Resources Canada. At -20C, a block heater can improve your fuel economy by as much as 10 per cent, the NRC says.
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But not all spark plugs are the same. There are several different types on the market, and you'll need to ensure that you're getting the right type. Additionally, your vehicle might have more than one spark plug per cylinder (some high-performance engines have two).
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When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification. ... A: No, cleaning your old spark plugs is not recommended. Dirty, fouled spark plugs may also have broken or chipped insulator tips, worn electrodes, or worn or missing side wires.
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Introduction. Changing spark plugs takes about an hour (for a four-cylinder engine) and will save you at least a hundred bucks in labor if you do it yourself. In most cases it's a simple job that will help to maintain peak performance and the highest possible gas mileage.
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How can you tell when your spark plugs need changing? Most modern spark plugs are made from ceramic and iridium or platinum, and should last for 60,000 miles or more. However they should be inspected every 30,000 miles or so, which will give you an idea of the health of the engine.
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Wet spark plugs means the spark plugs are not firing. The spark plugs are coated with unburned gasoline, which allows the ignition voltage to short circuit to ground instead of jumping across the electrode gap normally. Wet fouled spark plugs can be caused by flooding the engine when attempting to start a cold engine.
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Long-life platinum and iridium spark plugs will typically last up to 100,000 miles or longer provided the engine isn't using oil or doesn't spend a lot of time idling. Replacing spark plugs at 100,000 miles can be troublesome on some applications.
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Do Spark Plugs Always Have to Be Gapped? Not always. In the past, it was necessary to gap spark plugs, but today spark plugs are usually pre-gapped. It is advisable to double check that the gap is correctly set to the vehicle's recommended setting when installing spark plugs.
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Typically the heat range for NGK Spark Plugs varies from 2-11. This number indicates the thermal characteristics of a spark plug, or how 'hot' or 'cold' a spark plug is. ... This means the spark plug will heat up easily and reach its optimal operating temperature.
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Platinum and Iridium plugs perform at a lower level than copper spark plugs, because they are less conductive and they tend to overheat. However, the overall longevity of these two types of metal is better than copper plugs. In reality, copper has the best performance of all three and the worst longevity.