22 Shop Tricks Veteran Technicians Use

Some of this trade is in the service information and some of it only travels by standing next to somebody who has done the job four hundred times. Here is a set of the second kind — small, concrete, and mostly learned the hard way.

On the car

Crack the fastener before the car goes up. Lug nuts, axle nuts, crank bolts, anything that needs the weight of the car to hold it. Ten seconds now, ten minutes of improvising later.
Take a photo before you disassemble. Free, instant, and it settles every argument about where the bracket went. Do it on anything with more than one hose or connector.
Bag and label by sub-assembly, not by pile. Especially on jobs that will sit overnight or get handed to someone else.
Anti-seize on anything steel into aluminium. Exhaust studs, sensors, thermostat housings. The next tech to touch it may be you.
Heat before force. Torch and a little wax on a rusted fastener beats a bigger breaker bar, and it does not snap the stud.
Never reuse a torque-to-yield bolt. Head bolts, some suspension and axle bolts. Look it up rather than assuming.
Retorque wheels after a road test. Every time. It is the cheapest comeback insurance in the shop.
Zip-tie the caliper. Never let it hang on the hose, even for a minute.
Mark the driveshaft, the pulley, the flange. A paint pen mark before it comes apart saves a balance problem later.
Check the other side. If one lower ball joint is shot, look at its twin before the customer approves anything.

Diagnosing

Verify the complaint yourself. Drive the car with the customer’s description in hand. A third of the time the actual symptom is not what got written on the ticket.
Check the basics before the theory. Battery voltage, grounds, fluid level, obvious leaks. An enormous number of strange electrical faults are a corroded ground.
Look for a TSB before you look for a cause. Somebody has almost certainly seen this exact pattern already.
Record freeze frame and fuel trims before you clear anything. Once it is cleared, that information is gone and an intermittent fault may not return for a week.
Wiggle test with the meter connected. Intermittent connections show themselves under motion, not at rest.
Do not chase a code, chase a circuit. The code names a circuit with a fault, not a part that is bad.
Test the part before you replace it. Every parts-cannon repair started with skipping this step because the part was cheap.

Around the shop

Write the finding, not the colour. “Pads 3mm, replace at 3” sells work. “Brakes yellow” does not, and your advisor cannot fix that from the counter.
Tell the advisor early. A five-minute call when you find something big is worth more to the shop than a perfect estimate two hours later.
Road test after, not just before. The customer’s first drive should not be the first time the repair is checked.
Keep the old part until the customer leaves. Questions come up and having it on the bench answers them.
Clean the bay between jobs. The socket under the rag costs you more time per day than you think.

The one underneath all of them

Almost every item on this list is the same move: spend a small amount of thinking before the job rather than a large amount of time during it. That is most of what separates a technician who turns hours from one who works hard all day and finishes behind.