Shoutout to the guy who told me to try a bore scope on that old truck

I was working on a 1998 Ford F-150 with a rough idle, and this older mechanic at the shop kept saying I should check the cylinders with his cheap bore scope. I thought it was just a toy, you know? But after two days of swapping sensors and checking vacuum lines, I finally borrowed it. Found a huge chunk of carbon stuck under a valve on cylinder 3, clear as day. That was about six months ago, and now I use my own $150 scope from Harbor Freight at least once a week. It's saved me so much guesswork on engine noises. Anyone else have a tool they doubted that turned into a must-have?

2 comments

2 Comments

emery_craig15d ago

Honestly, the best part is how it changes how you listen to an engine. After seeing inside a few, you start to connect weird sounds to actual problems you've seen. That rattle isn't just a "maybe it's this," you picture a loose piece of carbon bouncing around. It trains your ear in a way just guessing never could.

owens.nancy15d ago

You said "cheap bore scope" but honestly, that Harbor Freight one isn't even that cheap for what it is. The real cheap ones are the $50 phone camera ones. Still, totally get the point. It's wild what you can see once you actually look inside.