Spent 3 hours fighting a stripped brake bleed screw on a mountain bike

I was doing a routine brake bleed on a customer's 2022 trail bike last Friday and the bleed screw just would not budge. Tried every trick I knew - heat, penetrating oil, even a tiny impact driver. After about 45 minutes of wrestling with it, I finally stripped the hex head completely. Had to drill it out and use an extractor set, which took another 2 hours because the screw was in a tight spot near the frame. Has anyone found a reliable way to prevent these cheap bleed screws from seizing up?

2 comments

2 Comments

kai_bennett1d ago

Buddy of mine runs a bike shop and had the exact same problem on a customer's Ibis last month. He said he started putting a tiny smear of anti-seize on every bleed screw during assembly and hasn't had a stuck one since. Cheap solution that's saved him way more than three hours of drilling.

claire4431d ago

Honestly, three hours on a bleed screw? That feels like a lot. I mean, I’ve definitely fought with stuck ones before, but after 20 minutes I’d just cut my losses and order a new caliper for like 40 bucks. Seems like way less hassle than drilling and extracting in some tight spot near the frame. Tbh, unless it’s some super high end part, I wouldn’t sweat it that hard.