How to machine drum brakes.

[@mikep.6271]

Very timely video! I just put new front and rear brakes on my '91 Chevy van: new rotors, calipers, and ceramic pads on the front. New drums, brake cylinder, shoes w/all the springs and assorted pieces on the rear (which I couldn't have put back together w/out your drum brake video!). Anyway, after all that work imagine my disappointment to feel even more vibration coming out of the rear end than before! I put it back up and removed the wheels & drums to inspect and nothing jumped out as a cause for the extra vibration. The new drum surface looks OK to my eye, but I'm thinking about flipping the drum around, bolting it down to the hub and see if I can do a run-out test with a dial indicator to see if the drum is uniform or not.If that doesn't reveal the problem, I will either replace the drums with new ones or have the old drums resurfaced (if there's enough meat left). Your thoughts on the problem would be greatly appreciated!!

[@wayofthewrench]

Nice! Well first things first, figure out if it's the front or back causing the vibrations. Use your emergency brake only and see if the vibration is gone. If it is then it's the front. Yeah a magnetic dial indicator can show if it's got runout and how much. You could also mark the drum, take it off, and install it 180 degrees from where it was to see if that helps. Also check other things like possible loose lugnuts, brakes not bleed properly, brake fluid leak on the friction material causing it to grab, improper clearance on shoes to drum, springs or new parts improperly installed causing rubbing/hitting. Lot's to check so try to isolate where it's coming from. Hope that helps. Thanks for the watch and your support for the channel!

[@dmcalonan1359]

Cant find a way to email, ever think about doing correct assessment of fuel trims and diagnosing from just those readings? How about ABS sensors and vehicle speed sensor, the dreaded p0500 pain in the a** to diagnose at times, esp. when all you have is a code and everything seems to function normally.

[@wayofthewrench]

Yes those would be all good videos to make in the future. At this point though, I am focusing on the foundations of automotive theory and practice as these skills can be used to help with a lot of those issues. Simple wiring/connector tests with a multimeter, voltage input and output checks on sensors to check the part or if power gets to it. Even abs wheel speed sensors, I confirm the obd code with a Ac voltage test on the sensor with a multimeter while spinning the wheel. These all had to be done manually before obd systems and are even easier with obd pointing or leading you to the issue. Intermittent issues are very hard to diagnose but usually point to loose/corroded connections, failing wiring, or an internally failing part. Hope that helps. Expect lots more content to come in the future! Thanks for the watch and your support for the channel. If you deem me worthy, I'd really appreciate it if you could share out my channel on your social media so I can help more people. Thanks!

[@marcush1968]

Cars are cool. But VPins are cooler. 😅

[@wayofthewrench]

Both are very cool....so is welding....building stuff is awesome! Thanks for the watch and your support for the channel! New vpin video out soon!