What kind of engine failure you actually have
A blown head gasket shows up as coolant loss, white exhaust smoke, overheating, or oil that looks like a milkshake. On many engines this is a $1,500–$3,000 repair, and on transverse V6s and anything requiring engine removal it goes higher.
Rod knock or main-bearing failure is the deep, rhythmic knock that tracks engine speed. That means internal wear in the rotating assembly and the fix is a rebuild or a replacement engine — usually $4,000–$8,000 installed on a mainstream car.
A seized engine won't turn at all — often the result of running dry of oil, or a timing failure that let valves meet pistons. Hydrolock is the same outcome from ingesting water. In both cases the engine is scrap; the rest of the car is not.
Repair versus replace versus sell
Run the numbers honestly. Look up what your exact year, make, model, and mileage sells for in good running order. Subtract the installed repair quote. If what's left is close to — or below — the salvage offer on the car, repairing is a way of spending money to break even.
The repair sometimes does make sense: newer vehicle, high remaining value, a well-documented body, and a failure confined to one component with a known fix. A five-year-old truck with a bad head gasket is usually worth fixing. A fifteen-year-old sedan with rod knock is not.
Watch out for the middle path that eats the most money — a used engine of unknown history installed by the cheapest shop. You get a car with two unknown drivetrains' worth of risk and no warranty, and you've spent the salvage value to get there.
How a dead engine changes the offer
Less than most sellers expect. The engine is a fraction of what a recycler is buying — the shell, wheels, glass, panels, interior, electronics, and catalytic converter are all untouched by whatever happened inside the block.
What does move the number: the transmission's condition, because a good transmission is a high-value used part; the model's parts demand; and the catalytic converter, which is one of the highest-value single components on the car.
If the engine failed from overheating, mention it — a cooked engine sometimes takes the radiator, fans, and hoses with it, and buyers price known-good cooling components separately.
Don't part it out first
Selling the good transmission, the wheels, and the converter yourself and then scrapping the shell looks profitable on paper and usually isn't. You lose the parts premium in the offer, the shell becomes a hard tow, and you spend weekends on it.
It also creates a problem at pickup: an offer written for a complete car doesn't hold for a stripped one, and that conversation happens with a driver in your driveway.
If you genuinely want to part it out, do it fully and knowingly before you get an offer — then describe the car accurately as a stripped shell.
Getting it collected and paid
A car with a dead engine still rolls, so a standard flatbed handles it. Make sure the tyres hold air if possible and the car isn't boxed in; both make the collection quicker.
Have the title signed at pickup and your ID ready, clear the car out, and pull the plates unless your state keeps them with the vehicle. Payment happens at the handover.
Cancel insurance once the car is physically gone, and file the notice of sale or release of liability if your state has one.