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In the diesel world, "blow-by" is a term you’re bound to run across at some point if your line of work involves diesel-powered vehicles of any kind. What is blow-by, what causes it, and how concerned should you be? At Pressurized Performance and Off-Road in Texarkana, AR, our fleet maintenance and diesel technicians see it on a regular basis. Here we’ll take a quick look at blow-by, correcting it, and preventing it.