| General > General Technical Chat |
| Insane overengineering of a car headlight |
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| Monkeh:
--- Quote from: Gyro on February 15, 2022, 09:40:43 pm --- --- Quote from: Monkeh on February 15, 2022, 09:06:38 pm --- --- Quote from: Gyro on February 15, 2022, 08:50:26 pm ---Gradual clouding of the outer polycarbonate lenses of headlamps seems to be almost inevitable at some point as the car ages ... We may end up with a situation where sealed headlamp systems start failing vehicle inspections much sooner than we are accustomed to. --- End quote --- It's a good thing they're readily polished then? --- End quote --- Yes sure, you can attack them with aftermarket polishing and surface sealing solutions, they'll never be as good as new though. You get crazing and micro cracking in the polycarbonate that you'll never polish out. --- End quote --- 70k miles down the road nothing on the inside or outside of my car is or will ever be good as new - is this a problem? I can't speak for fancy laser headlights, but traditional ones are certainly restorable to be perfectly serviceable. |
| BrokenYugo:
--- Quote from: Gyro on February 15, 2022, 09:40:43 pm --- --- Quote from: Monkeh on February 15, 2022, 09:06:38 pm --- --- Quote from: Gyro on February 15, 2022, 08:50:26 pm ---Gradual clouding of the outer polycarbonate lenses of headlamps seems to be almost inevitable at some point as the car ages ... We may end up with a situation where sealed headlamp systems start failing vehicle inspections much sooner than we are accustomed to. --- End quote --- It's a good thing they're readily polished then? --- End quote --- Yes sure, you can attack them with aftermarket polishing and surface sealing solutions, they'll never be as good as new though. You get crazing and micro cracking in the polycarbonate that you'll never polish out. --- End quote --- And you have to polish every year or so as the UV keeps attacking the plastic. I've not tried it, but I've heard scuffing with fine sandpaper and spraying on the best gloss clear coat paint you can get (to add back UV protection) is a fairly permanent fix. |
| SilverSolder:
I saw this youtube video where the headlamps were "polished" by directing heated acetone vapor onto them... looks good in the video! |
| tooki:
I wonder how many Americans think they’ve been dealing with being blinded by modern headlamps, not realizing they’ve never, ever seen them in use? I ask because it was in the news today that just yesterday, the NHTSA announced that it will finally allow adaptive headlamps and not just “dumb” high and low beams. https://arstechnica.com/cars/2022/02/the-us-will-finally-allow-adaptive-beam-headlights-on-new-cars/ (Note also that the beam patterns in USA up to now contain a deliberate amount of upwards lighting to illuminate road signs. And that many of the headlamps that really dazzle oncoming traffic are illegal aftermarket units. And that the worst dazzling is experienced by sedan drivers, caused by SUVs both oncoming and behind them, due to the height differential.) |
| emece67:
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