c/auto-mechanics

Watched a tech at a shop in Denver chase a misfire for 2 hours, then I spotted it in 5 minutes

Stopped by a friend's shop off Federal Blvd last Thursday to grab a part. He had a 2012 Civic with a cylinder 3 misfire, already swapped coils and plugs, still missing. I noticed the harness clip on the injector was broken and the wire was barely hanging on. Told him to wiggle it while I watched the scan tool, misfire count jumped every time. Sometimes you gotta look at the dumb stuff before you start throwing parts at it. Anyone else got a story about a simple fix that took forever to find?

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dakota160•8d ago

I switched from impact driver to hand ratchet for interior trim, no regrets

Used to zip every screw out with my Milwaukee impact, figured faster was better. Then I stripped a Torx head on a door panel in a 2018 F150 over in Salem, took me an hour to drill it out. Now I use a hand ratchet with a magnetic bit holder for anything plastic, it's slower but I haven't broken one clip since. Anyone else gone back to old school tools after a dumb mistake like that?

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walker.robert•8d ago

That salvage yard in Tacoma had a whole wall of old alternators, learned something

Stopped by Pick-n-Pull off of I-5 last Saturday just to grab a wiper motor for my 97 F-150, but ended up walking past this row of late 90s Ford alternators. All of them had the same burnt smell and melted plastic on the connector, which got me thinking about how the voltage regulator on those fails way before the brushes do. Swapped in a junkyard unit from a 2002 Explorer instead, same bolt pattern, and it's been solid for 300 miles. Anyone else find that cross-model trick saves you from paying the $180 reman price at the parts store?

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bettyh84•10d ago

Watch the lift arms on old 2-post lifts, near disaster at my shop

Had a customer's F-150 on my ancient Rotary lift in Tucson yesterday, arms shifted mid-job. The safety latch never caught, truck dropped 2 feet before I slammed the jack under it. Anyone else seen worn arm locks fail on older lifts, or should I just spend the $4k on a new one?

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kelly.parker•11d ago

Coil pack died on a highway in Tulsa, then my tow decision got questioned

I was about 30 miles out of Tulsa last Tuesday when the engine started bucking like a horse, threw a P0300 code, and died at a rest stop. My ground cable had corrosion so bad it looked like powdered sugar, and the coil pack was reading 0 ohms across the primary side. I called a buddy who said just replace the pack and drive home, but I paid $140 for a tow instead because I didn't trust the electrical gremlins. He still gives me grief about it, saying I could have limped it 2 miles to an AutoZone. Which would you do, risk the limping or eat the tow bill?

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ninanguyen•11d ago

Pro tip: stop using impact guns on lug nuts, I learned the hard way

For years I zipped every lug nut on with my impact gun, figured torque sticks were for rookies. Then last Tuesday in Austin, a customer's wheel sheared two studs clean off on the highway after a rotation. Now I hand-start every lug, torque to spec with a click wrench, and do a final recheck after 50 miles. Has anyone else seen studs fail from over-torquing, or was this just bad luck with cheap steel?

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grace_perry44•13d ago

Spent $380 on a fancy scan tool and honestly I'm torn on if it was worth it

Ngl, I bought a $380 Autel scanner 6 months ago thinking it would replace my old cheap one and save me time. It did solve a weird ABS issue on a 2014 F-150 that my other tool couldn't even read, so that part paid for itself. But then it took me 20 minutes to navigate the menus for a simple code clear, and the old one was just plug and go. I had a seasoned tech tell me 'you don't need all that, just get a $50 code reader and a good multimeter.' Half the features I paid for I never touch, like the battery test and oil reset stuff. For a solo mechanic doing basic repairs, is the extra money actually worth the saved headaches, or am I just a sucker for shiny screens? Has anyone else dropped big cash on a tool that ended up being overkill for their daily work?

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mark611•14d ago

Switched from grease guns to spray lithium for door hinges, never going back

For years I used a grease gun on every door hinge that came through my shop, even the family sedans. But last winter I had a 2014 Civic where the latch was sticking and the hinge pins were dry as a bone, so I grabbed a can of spray lithium that I kept for the tractor. It took about two minutes per door versus the whole setup and cleanup of the grease gun, and the customer came back a month later saying the doors were quieter than they'd been in years. Now I keep spray lithium on every bay shelf and only break out the gun for actual suspension work or heavy trucks. Has anyone else made the switch and noticed a difference in how fast you can turn around a simple lube job?

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rileyowens•14d ago

Snapped a breaker bar at 2AM on a frozen lug nut

I was doing a roadside tire swap off I-80 near Des Moines last month when the impact gun died on me. Broke out the breaker bar and a 6 foot pipe for leverage, which felt solid until the bar snapped right at the swivel head. I ended up using a propane torch I keep for seized bolts, heated the nut for two minutes, and it came off with a ratchet. Anyone else carry a torch as a backup for stubborn lug nuts, or is that just my old timer habit?

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xena_allen•15d ago

The torque wrench I trusted for a decade was off by 25%

Found out last Tuesday when a hub nut came loose on a customer's F-150 at my shop in Tulsa. I'd been using the same beam style torque wrench since 2014, figured it was fine because it felt right. The guy came back with a grinding noise, and when I checked the nut with a borrowed digital unit, it clicked at 68 ft-lbs instead of the 90 I thought I was setting. That whole time I was teaching my nephew the trade with that thing. Now I check every wrench against a calibration rig at the start of each month, costs me 40 bucks a visit but beats a comeback. Anyone else run a setup that long before realizing it was lying to you?

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riley860•15d ago

The $15 magnetic drain plug that had me eating crow

Picked up one of those cheap magnetic drain plugs off Amazon for my '05 Silverado, figured it was a gimmick. Three oil changes later I pulled it out and the tip was covered in a fine grey sludge, like metallic paste. Sent a sample to a buddy who runs a lab in Phoenix, he said it was normal wear but the magnet caught it before it circulated. Now I tell every customer who laughs at the $15 part to just try it once. Anyone else run these long term or see actual damage prevented?

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davidh88•18d ago

Wasted 3 years torquing oil pan bolts by feel, then a spec sheet set me straight

Tightened an oil pan on a 2012 Civic to what I thought was snug, and the gasket squished out like a wet pancake... turns out the spec was 8 ft-lbs and I'd been doing around 40 the whole time. Who else learned torque specs the hard way after trusting their wrists for years?

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angelafisher•18d ago

My toolbox drawer hit 100 sockets and I laughed out loud

So I was organizing my top drawer last Saturday, you know the one with all the random 12-points and shallow wells, and I actually counted them out of boredom. Hit exactly 100 sockets, not counting the 10mm ones I've lost to the void this year. Feels crazy because I bought my first set at a garage sale in Phoenix for like $15 back in 2019 and I swear half of these were just extra ones I grabbed from job sites. Has anyone else hit a weird milestone like that with their tools and had to stop and question their life choices?

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olivia_morgan8•19d ago

Hit 2,000 engine rebuilds last Friday, is that a good milestone or a warning sign?

I tallied my work orders going back to 2015 and landed on 2,000 full rebuilds in my shop outside Tulsa, but I keep going back and forth on whether that number means I'm a seasoned pro or just someone who's seen too many blown head gaskets, so what does hitting a big number like that actually say about your career, and have any of you hit a similar milestone that made you question the whole path?

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the_charlie•20d ago

That old timer who said to use air tools on rusted bolts was spot on

Fought a seized caliper bolt for 2 hours with hand tools last weekend, then borrowed my neighbor's impact wrench and it came loose in 30 seconds, anyone else still wasting time trying to save their compressor?

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craig.grant•21d ago

Torn between replacing a rusty brake line or patching it on a 2004 Silverado in Phoenix

Out on a job last Tuesday, my buddy's truck lost pressure when we hit a pothole near 7th Ave. The line had rusted through right at the rear axle, so we were stuck in the sun with a puddle of DOT 3 under us. He wanted to patch it with a compression fitting and get moving, but I've seen those fail on crusty metal before. I argued for replacing the whole line, which meant an extra hour and a trip to the parts store, but he kept saying it was fine for now. What do you all do when a customer or coworker pushes for the quick fix over the proper job? Has anyone had a compression fitting hold up long term on a frame rail?

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taylorm89•22d ago

Cordless vs pneumatic, I'm done pretending air tools are outdated

Everyone keeps raving about battery-powered impact wrenches, but my 1/2 inch Snap-On air gun still breaks loose lug nuts that the cordless just stalls on. After 8 years in the shop near Austin, I'll take the hose over swapping batteries mid-job any day. Anyone else sticking with pneumatics for the heavy stuff?

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nora184•22d ago

The muffler that tried to become a lawn dart last Tuesday

I was doing a quick exhaust swap on an old F-150 in my bay when the hanger clamp shot loose and the whole rear section dropped like a cartoon anvil. Thing bounced off the lift arm and rolled clear across the shop floor, nearly took out the parts guy's foot. Took me 20 minutes to fish it out from under the tire rack, and the customer walked in mid-chase asking if everything was fine. I just pointed at the dented pipe and said 'she's a little dramatic today.' Anyone else had a part go full projectile on them during a routine job?

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mitchell.nancy•22d ago

Old air ratchet vs new electric ratchet, honestly surprised myself

Been turning wrenches since 1998 and swore by my old Snap-On air ratchet through everything, but picked up a Milwaukee electric one on a Cyber Monday deal for $189 and used it on a rusty subframe job in January. That thing zipped off 16 year old bolts without me dragging the compressor hose across the whole bay, no busted knuckles either. Anyone else finally give up the air line for battery power during a big job?

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noahpark•23d ago

Is a $1500 scan tool worth it or just a fancy paperweight?

I splurged on a high end scanner for my shop about 8 months ago, thinking it would pay for itself. It nailed a weird ABS issue on a 2018 F-150 that had me stumped for two days, so that alone felt like a win. But then it sat in the drawer for weeks, and my $80 basic reader handled 90% of the daily oil change codes and brake resets just fine. Some of the guys swear you need the pricey stuff for modern modules, but others say it's just bragging rights. I'm on the fence about whether I'd drop that cash again, what's your take on expensive diagnostic gear vs. the cheap stuff?

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kai463•28d ago

TIL a customer thought their 2012 Corolla had a 'blinker fluid' leak

Guy comes in last Thursday, dead serious, says his turn signals are sluggish and he thinks the fluid is low. I stared at him for a good 5 seconds before I realized he wasn't joking. Some dude on TikTok apparently made a whole video about checking blinker fluid levels. Charged him $40 for a 'diagnostic' just to show him the manual and tell him his bulbs were fine. Has anyone else had customers fall for this stuff straight from the internet?

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lily_schmidt53•1mo ago

Spotted a trick at a local shop in Birmingham that saved me 2 hours

Honestly, I was at Jim's Auto Repair off Route 78 last week watching them do a timing belt on a 2012 Accord. They used zip ties to hold the cam gears in place instead of the fancy $80 tool I always buy. Ngl, it worked perfectly and took them maybe 10 minutes total. Anyone else got a cheap hack like this they swear by?

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mila_sullivan•1mo ago

Old timer in Denver showed me how to bleed brakes by feel

Last month a guy at a shop on Colfax said I was doing it all wrong. He just cracked the bleeder, listened for the air, and told me to stop when the sound changed. Has anyone else dumped the 2-person method for something like this?

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wells.reese•1mo ago

Broke a torque wrench on a Subaru head bolt and learned my lesson

I was doing head gaskets on a 2005 Outback last month and snapped a Harbor Freight torque wrench at 45 ft-lbs. Had to borrow my neighbor's Snap-on to finish the job, and it clicked perfectly at the same setting. Anyone else had cheap tools fail at the worst time?

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the_lucas•1mo ago

Broke a torque wrench on a rusted control arm bolt in Cleveland last winter

I was doing a front suspension job on a 2010 Ford Fusion, rust belt car. That lower control arm bolt was seized solid. I had my 1/2 inch torque wrench set to 85 ft-lbs for the final pass, but the bolt snapped at like 50 and the wrench clicked weird. After that it wont click at all. Anyone else had a torque wrench break on rusted hardware?

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