Why Use A Professional Mechanic to Start A “Dead” Car

by Mike Thies, Certified Vehicle Appraiser

Luckily, “Dead” in this case doesn’t mean gone forever.  It refers to a car that may have been running fine at some point but has been left unattended, not started, for an extended period.  Museum cars, family estate probate, life demands; the reasons fill a long list of how this can easily happen.  Members of the International Vehicle Appraisers Network encounter this fairly regularly and non-running cars are clearly not as valuable. Getting them started properly is important, yet a high risk of doing catastrophic damage.

A professional mechanic preparing a car that has been sitting for several years will approach the process with caution, beginning with a thorough visual inspection. This includes checking for signs of rust, fluid leaks, corrosion, or damage from rodents and pests that may have chewed through wires or hoses. The tires are examined for signs of dry rot, and the car is elevated to inspect the undercarriage for rust or damage. The mechanic also checks the condition of the belts, hoses, and wiring, ensuring nothing has deteriorated to the point where it could fail during startup. This initial assessment helps prevent costly damage and ensures the vehicle's safety.

The next critical step involves draining and replacing all fluids. Old oil, coolant, transmission fluid, brake fluid, and fuel can break down and become contaminated over time, leading to potential engine or system damage. The fuel system is particularly delicate since gasoline deteriorates and can clog the fuel lines, injectors, or carburetor. The mechanic will typically drain the fuel tank, clean or replace the fuel filter, and ensure the fuel pump is operational. Additionally, they will replace the oil and oil filter and may remove the spark plugs to inspect and lubricate the cylinders by adding a small amount of oil to protect the engine from damage during initial startup.

Before attempting to start the engine, a mechanic will also test the battery and charging system. If the battery is dead, it will either be replaced or temporarily charged with a jumper. Once power is restored, the mechanic may manually turn the engine using a breaker bar to ensure that it isn’t seized, and that oil can circulate properly. Only after verifying that the engine isn’t locked and fluids are at the proper levels will they proceed to start the car, allowing it to idle gently while observing for any unusual sounds, smoke, or fluid leaks. The brakes and suspension are then tested to ensure safety before any attempt to drive the vehicle is made. This meticulous, step-by-step process ensures that the car is revived without causing unnecessary harm.

Note: Some Professional Mechanics have some "secret" magic tricks they don't share, too! :-)

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