Spark Plug Heat Ranges

Video Transcript

"Hi. My name is John and I'm with expertvillage.com and we're changing spark plugs today. Now, we've removed our spark plugs and we've talked about how our spark plugs should look. It should look like this. It's a little darker than it should be and the edge, it should be a little more brown to grayish tan right here on the electrode, but it's okay. It's an older car; that's what you should expect. Now, when the spark plug is out, take your spark plug out, unless you know how your car runs, unless you're doing other modifications, look at your spark plug. You can learn a lot. Now if it's how it should look, then you should buy a spark plug with the same heat range. Now, a heat range, if you have a turbo on your car or a super charger, you want to get a spark plug that creates less heat. So, in this case, I don't have a turbo or a super charger and it's not getting hotter then it should, it doesn't tend to overheat, I can tell. So I'm going to put in the exact same heat range in my spark plug."