The Design Community Hub

c/auto-mechanics

13

bailey.sandra•19h ago

Threw $350 at a snap-on scan tool and it sits in my box collecting dust

Bought a fancy scanner off the truck last year thinking it'd save me hours on diagnostics. Turns out my old $80 bluetooth reader and a laptop with free software does everything I need for 90% of the jobs I take. The snap-on thing won't even talk to some of the older fords I work on. Anyone else got a tool they bought that turned out to be a total waste of cash?

4

blaker75•1d ago

Finally gave in and tried a cordless impact for suspension work

I was dead set against swapping my air gun for a battery powered one for years. Thought they didn't have enough torque for stuck bolts and rusted nuts. Then last month I was doing a strut job on a 2015 F-150 in my driveway and my compressor kept kicking on every 5 minutes. My neighbor brought over his Milwaukee high torque and I watched it snap loose a lower strut bolt that I had been soaking in PB Blaster for 20 minutes. It took maybe 2 seconds and I just stood there. I bought the same model that weekend and now I barely touch my air tools for anything under the car. Has anyone else had that moment where they finally admit battery stuff is just better?

7

rowan_thomas•1d ago

Overheard a customer saying 'it's probably just a loose wire' and it made me think

Was working on a 2015 Ford Focus yesterday at the shop in Portland and this guy walks in with his car not starting, tells the front desk it's probably just a loose wire or a bad battery. I ended up spending 40 minutes diagnosing it - turned out the PCM had a cracked solder joint from heat cycling. Made me realize how often we brush off complex stuff as simple fixes. Anyone else ever have a customer's quick guess turn into a much deeper problem?

8

tara345•1d ago

Hit 200,000 miles on my old F-150 last Tuesday

I was driving home from a shift and glanced at the odometer and there it was, 200k on a 2005 truck. It's got rust spots and the AC blows warm half the time, but that engine still starts every morning without complaint. Made me think about how vehicles used to be considered worn out at 100k, now we just keep patching them together. Anyone else got a high-mileage beater that just won't quit?

28

the_lee•3d ago

Spent 5 years torquing lug nuts in the wrong order - a customer's tire shop receipt tipped me off

I always just went clockwise because it seemed faster and never had issues. Then a guy handed me a receipt from Tire Kingdom that literally said "cross-pattern or bust" with a smiley face, and I realized I'd been warping rotors for half a decade. Anyone else have a facepalm moment where a simple paper or a customer comment made you change a habit?

22

webb.stella•4d ago

Hit 50,000 brake jobs today according to my records. That number caught me off guard.

I keep a little notebook in my toolbox, just a habit from my first mentor. Every brake job I do, I mark it down. Yesterday I flipped back through and counted. 50,013 to be exact. I started in 1995 in a little shop outside of Nashville. Never thought I would do that many. It made me think about all the different cars, the rusted bolts, the come backs. What milestone numbers have you guys hit that surprised you?

6

wendysmith•4d ago

Finally figured out my fuel pressure issue after chasing it for 3 weeks

Had a 2005 Silverado come into the shop back in March that kept dying at random times. Customer said it felt like it was running out of gas even with a full tank. I swapped the fuel pump first, didn't fix it. Then the fuel filter, nope. Even checked the relay and wiring harness. Turns out it was the fuel pressure regulator on the return line. It was bleeding pressure back to the tank slowly after the truck warmed up for about 20 minutes. Found it by hooking up a pressure gauge and watching it drop from 58 psi to 32 psi over 15 minutes. That was a tough one because the pressure only failed when the engine got hot. Anyone else deal with a pressure regulator that tested fine cold but failed hot?

2

the_eric•4d ago

Just read that modern car engines are designed to run 200,000 miles before major repairs, but most mechanics I know see failures around 150k

I was flipping through a SAE paper my buddy left on the counter and it had a chart showing durability targets for 2024 engines, but in my 22 years turning wrenches in Portland I've hardly seen a turbo or timing chain make it past 150,000 without giving trouble, so who's really testing those numbers?

7

simon_chen•6d ago

Had a moment this morning that changed how I think about brake jobs

I was reading a thread on another forum where a guy said he always replaces caliper brackets on older cars even if they look fine. That stuck with me because last month I did a brake job on a 2004 F-150 and two weeks later the customer came back with a pulsation issue. I had just thrown new pads and rotors on the old brackets. Turns out the bracket was slightly warped from heat cycles and it caused the new pads to wear uneven. I wasted my time and the customer's money because I was too lazy to spend the extra 30 bucks on brackets. Now I'm making it a rule to check brackets with a straight edge every time. Do you guys swap brackets as a matter of habit or only when they're obviously bad?

21

lucas159•8d ago

Finally fixed a 15-year-old Honda Civic AC in my driveway this afternoon

I picked up this 2008 Civic for cheap last summer knowing the AC was dead. Tried recharging it back in June but the compressor clutch never kicked in. Turns out it was just a 50 cent relay under the hood. Plugged the new one in, fired it up, and ice cold air came out after 3 years of sweating through summer drives. Has anyone else had a simple electrical fix save them from a huge shop bill?

17

james_butler•8d ago

Finally gave in and bought a cordless impact after years of fighting with hand tools, total game changer

I was that guy who swore by breaker bars and ratchets for everything. Spent $250 on a Milwaukee M18 Fuel impact wrench during a sale last month and it paid for itself in two jobs. Pulled off a seized lug nut on a rusty F-150 in 3 seconds that woulda taken me 10 minutes and a lot of swearing. Anyone else get converted late to battery tools and regret not doing it sooner?

23

vera_roberts•9d ago

Watched a guy at a local shop in Portland try to fix a brake line with vice grips and tape last Saturday

I stopped by a friend's garage to borrow a jack and saw one of his customers trying to patch a corroded brake line with electrical tape and a pair of vice grips. Said he'd been driving like that for a week. I had to step in and explain that's a straight path to losing your brakes at 60 mph. Has anyone else run into scary shade tree fixes that made you question how some people are still alive?

3

lucas159•9d ago

Used to grease u-joints every 3 months, now I just replace the whole driveshaft

Back when I worked at a shop in Phoenix, I'd hit every u-joint with a grease gun during oil changes. Now with these sealed joints on newer trucks, you can't even get a fitting on em. Had a 2022 F-250 come in last month with a bad joint, Ford wanted $900 for a whole new driveshaft instead of a $40 u-joint. Anyone else just stocking spare shafts now?

20

ray210•9d ago

Old timer at the Napa counter saved me $300 on a transmission flush

I was about to drop cash on a full transmission flush for my 2004 Silverado with 180k miles when this retired mechanic waiting in line told me to just do a drain and fill instead. He said flushes can shoot debris into the valve body on high-mileage trucks, and sure enough, my buddy's shop did a drain and fill for $80 and it's shifting smoother than ever. Has anyone else had a flush go wrong on an older vehicle?

18

janahenderson•12d ago

Got roasted by a customer for 'wasting time' and it made me a better mechanic

Tbh, I had this guy last month at my shop in Austin who was watching me do a diagnostic on his 2014 F-150. He asked why I was checking all 6 injectors when only one was throwing a code. I told him it's better to catch problems early but he called me a 'parts cannon' mechanic. That hurt but ngl he had a point. Now I explain exactly what I'm testing and why before I touch anything. Has anyone else had a customer call them out and it actually helped?

16

josephs26•12d ago

Hot take: That customer who yelled at me for 'overcharging' on a brake job actually taught me something about how I explain things.

Had a guy at my garage in Austin last Wednesday go off because I quoted him $450 for pads and rotors, then he came back 3 hours later after Firestone quoted him $700 and asked if I could still do the job, but the way he walked in with his head down made me realize most people just don't understand what labor rates actually cover. Has anyone else had a customer flip out on a quote only to come crawling back after seeing the real price somewhere else?

5

grant569•14d ago

Surprised to learn how many people skip oil changes by 2,000+ miles

I was reading through some industry data last night and found out something that really surprised me. Almost 40% of drivers delay their oil changes by over 2,000 miles past the recommended interval. Do you think modern synthetic oils make that a safe gamble, or are we just seeing a lot of blown engines waiting to happen?

-2

henderson.hugo•14d ago

Tried using brake cleaner on an O2 sensor and it actually worked

I had a customer's car throwing a P0135 code last week and figured I'd swap the sensor, but decided to try cleaning it first with CRC brake cleaner on a whim. Five days later the code still hasn't come back - has anyone else had luck cleaning sensors instead of replacing them?

11

holly_flores79•18d ago

The week I replaced a timing chain on a 2003 Dodge Ram and everything actually went right

Back in 2018 I had this Dodge Ram 5.7 Hemi come in with a rattling timing chain. I figured it would be a two day nightmare with broken bolts and fighting the oil pan gasket. But somehow every bolt came out clean, the timing marks lined up on the first try, and I had it buttoned up in about 6 hours. That never happens to me, you know? Has anyone else had a job that just clicked perfectly for no good reason?

15

the_shane•19d ago

I keep seeing guys torque lug nuts with impact guns around here

At the shop in Cincinnati we found three wheels warped last month from overtightening, and one came off on the highway because it was too loose. Why are people skipping the torque wrench step on customer cars?

3

betty_ward•21d ago

Dropped $80 on a cheap timing light and it threw off my whole tune

Bought a no-name timing light off Amazon for $80 and it was off by 4 degrees from the start, wasted half a day chasing a miss on a '92 F-150. Anyone else find that the cheap tools just ain't worth the headache?

16

logansullivan•21d ago

My torque wrench lied to me on a Subaru head gasket job yesterday

I was torquing down the head bolts on a 2010 Outback and snapped one clean off at 55 ft-lbs when spec says 58. Turns out my Snap-on torque wrench was 12 ft-lbs over from sitting in my damp toolbox all winter. Has anyone else had their calibration drift from storage conditions like that?

19

finley_walker57•22d ago

Tried a torque wrench calibration on my own for the first time

I've been putting off calibrating my 3/8 torque wrench for like 6 months lol. Finally decided to rig up a test with a weight and a measured bar in the shop yesterday. Turned out it was off by 8 ft lbs at 50 ft lbs setting, which is way worse than I thought. Anyone else found their torque wrenches drifting more than they expected?

5

christophermurray•23d ago

Spent 4 hours chasing a no-start on a 2012 F-150 before realizing the PATS system was just having a bad day

Went through all the usual suspects fuel spark compression and even swapped the crank sensor before the dealership guy next door walked over and said 'did you check the security light' and sure enough two key cycles later it fired right up has anyone else had their brains turned to mush by a simple immobilizer issue

13

janahenderson•24d ago

PSA: My impact gun died mid-job on a lug nut today

I was rotating tires on a 2018 F-150 this morning and halfway through the third wheel my Ingersoll Rand 2235 just quit. No warning, no weird noise, just stopped spinning. I had one lug nut left on each wheel so I broke out the breaker bar and finished by hand in the driveway. Took me 30 extra minutes and a lot of cussing. Turns out the brushes were worn down to almost nothing after about two years of daily use. Has anyone else had a battery or electric tool fail at the worst possible time?