How much does it cost to get spark plugs fixed when they blow?

Answer 1

It is can be extremely expensive to have a blown spark plug fixed, and depends on a couple factors; 1) Since spark plugs don't physically "blow", (other things can fail, like the threading of the cylinder head), the person telling you this either doesn't know what they are doing, mechanically, or they think you don't know enough, mechanically, to call them on this fictitious "blown" spark plug problem. 2) How much money you are willing to spend on with a person who doesn't, mechanically, know what they are doing, or how much the mechanic feeding you this fictitious "blown" spark plug story thinks he can get out of you.

You should continue to investigate the variety of problems that can cause a spark plug to fail to conduct sufficient energy to it's spark gap point, be it dirt, corrosion, carbon build up, etc. Many photos and short tutorials that demonstrate characteristics and failures of spark plugs can be found out here on the net. When no longer cleanable, new spark plugs are commonly obtained for a few dollars, maybe even the tens of dollars if you buy the gold/platinum/superfangled versions. In the placement of some engines, the accessibility to the plug itself may factor into the labor costs involved in a spark plugs replacement.