Using car tools safely means supporting the vehicle on stands or ramps, never working under a jack alone, and following each tool’s instructions exactly.
Car work looks straightforward until a jack slips or a fastener strips. The four rules that govern every job are simple: pick the right tool, follow the maker’s instructions, support the vehicle properly before going underneath, and never trust a jack to hold weight by itself. South Australia’s vehicle-hoist guidance spells out the ground rules — jacks need a firm, level, secure surface, and nobody should be under a vehicle supported only by a jack.
The First Step: Read The Tool’s Instructions
Every tool arrives with rules about how it should be used. For torque wrenches specifically, the manufacturer’s directions cover torque direction, lubrication requirements, and whether accessories are permitted. Snap-on’s technical guidance says to wear safety glasses, grasp the wrench in the center of the handle, and apply torque slowly and steadily. Stop immediately when the wrench signals the target torque — pulling past the click for “extra certainty” risks over-tightening the fastener and damaging the tool’s calibration.
Before any job, inspect the tool and any sockets or fasteners. Replace worn or cracked parts rather than hoping they hold.
Lifting The Vehicle: Jacks Versus Stands
Treated a jack as a lifting device only. Once the vehicle is raised, it belongs on jack stands or ramps before any work begins. A jack is not a support device, and no body part belongs under a vehicle held up by one.
The rules for stands come from occupational-safety guidance:
- Use jack stands in pairs, never alone.
- Place stands on firm, level, secure ground.
- Chock the wheels before raising the vehicle.
- Lower the vehicle onto the stands, then confirm it’s stable before going underneath.
If you’re assembling a starter toolkit, a solid set of stands and a torque wrench are the pieces worth buying first. Our tested roundup of top-rated car tools for beginners covers what actually earns its place in a home garage.
Torque Wrench Basics: Set, Pull, Stop
Torque wrenches exist because hand-tightening can’t hit a precise specification. The procedure is straightforward when you follow the sequence. Set the wrench to the specified value for the job, attach the proper socket, and keep the wrench square to the fastener. Pull steadily and slowly — jerking or pulling at an angle throws off the reading and can damage the tool.
Three mistakes cause most beginner failures:
- Using a cheater bar or handle extension. Unless the manufacturer explicitly allows it, an extension changes the leverage and invalidates the reading.
- Using the wrench to loosen fasteners. Click-type wrenches should only tighten. Removing a tight bolt can affect calibration or damage the mechanism.
- Ignoring the job’s exact sequence. Torque direction, tightening order, and lubrication requirements all affect the final result. Follow the vehicle’s service spec, not a general rule.
Storing Tools So They Keep Working
Storage matters more than most beginners expect. A click-type torque wrench should be stored at its lowest marked setting — never below the minimum scale marking. Leaving it tensioned at a high setting keeps the internal spring compressed and can throw off calibration over time.
That habit, plus one more, keeps your tools honest: keep the torque wrench set at zero when it’s not in use, and store all tools somewhere dry to prevent corrosion.
References & Sources
- SafeWork South Australia. “Vehicle Hoists, Jacks, Ramps and Stands.” Sets the rules for firm surfaces, chocking, and never working under a jack-supported vehicle.
- Snap-on. “Torque Wrench Use and Care.” Covers proper technique, calibration intervals, and prohibited uses.
- Thompson Rivers University. “Blocking and Jack Stands.” Details the 50% capacity rule and paired-use requirements for stands.
FAQs
Can I work under my car with just a hydraulic jack holding it?
No. A hydraulic jack is a lifting device, not a support device. Hydraulic seals can fail without warning, and the vehicle can drop suddenly. Always lower the car onto jack stands rated for its weight before putting any part of your body underneath.
Do I really need to recalibrate my torque wrench?
Yes, if you want accurate readings. If your wrench has been dropped, knocked, or used to loosen a tight fastener, have it checked sooner.
Is it okay to use a breaker bar on a torque wrench for extra leverage?
No. Handle extensions and cheater bars change the leverage and invalidate the torque reading. They can also damage the wrench’s internal mechanism. If a fastener is too tight to turn with the wrench, stop and use a breaker bar or impact tool instead.
