Borrowed a borescope vs buying one for a cylinder inspection

I needed to check some cylinder walls on a Continental IO-520 last week. My buddy let me borrow his cheap USB borescope from Amazon, the $40 one. The picture was so fuzzy I couldn't tell carbon buildup from a crack. Ended up driving 45 minutes to borrow a Snap-on one from another guy at the hangar and the difference was night and day. Has anyone else found a decent mid-range borescope that actually works for cylinder work?

2 comments

2 Comments

uma_patel193d ago

Man that $40 Amazon one sounds exactly like my experience. I borrowed a cheap one from a coworker to check spark plug threads on my lawn tractor and I swear I could have been looking at a blurry photo of Mars. It's the same pattern I see with everything from work gloves to multimeters. You buy the budget tool thinking it'll do the job, but then you waste more time and gas chasing a decent one anyway. For cylinder work specifically, I'd say the sweet spot is around $150. That gets you a brand like OTC or even the higher end Innova models. Your mileage may vary of course, but I learned that lesson with a crappy torque wrench once. Never again.

tessawebb3d ago

How are you defining "decent" though? Because @uma_patel19 mentioned the $150 range, but I've seen guys swear by the $100 Autel ones and then turn around and say the same thing about fuzziness. Is it really just about the brand name, or is there a specific feature like resolution or light quality that makes the difference? I wasted a whole afternoon with that cheap Amazon piece of junk and it cost me more in gas than if I'd just bought something decent upfront. So I'm wondering if there's a specific spec you look for now, like 720p vs 1080p, or if it's more about how the camera handles the tight spaces inside a cylinder.