“Blown engine” covers a lot of different failures. So does “the transmission’s gone.” What they have in common is a repair quote that makes you stop and do the arithmetic. Here’s a way to do it honestly, and what each answer leads to.
What usually counts as blown
- A thrown rod or spun bearing. A loud knock that gets worse, often after low oil.
- Hydrolock. Water drawn into the engine, for example after driving through deep standing water.
- Overheating damage. A failed head gasket or a warped head after the engine ran hot.
- Transmission failure. Slipping, harsh or delayed shifts, or a car that won’t move in drive or reverse.
The diagnosis matters because the fixes range from a repair to a full replacement. Get it in writing before you decide anything.
A repair-or-sell test
You don’t need anyone’s price list to work this out. You need three numbers you can actually get:
- The repair estimate, in writing, from a shop you trust. Ask whether it’s a rebuild, a used unit or a new one, and what warranty comes with it.
- What the car would be worth after the repair, for its age, mileage and everything else that’s wrong with it.
- What else is coming due. Tires, brakes, rust, a check-engine light that was on before the engine went.
If the repair plus what’s coming due takes up most of the car’s value after repair, you’re paying to own a car worth little more than the bill. That’s usually the point where selling wins. If the car is otherwise sound and the repair is a modest share of its value, fixing it can make sense.
The options in between
| Option | Good when | Watch out for |
|---|---|---|
| Repair or rebuild | The rest of the car is sound | Estimates that grow once the engine is open |
| Used engine or transmission | A common model with parts easy to find | Unknown history of the replacement unit |
| Sell as-is to a private buyer | Someone who fixes cars wants that model | Buyers price in the repair, and it takes time |
| Scrap it | The repair outweighs what the car would be worth | Pulling parts first lowers the scrap offer |
What a dead engine does to a scrap offer
Less than people expect. A scrap offer comes from the car’s weight, the metal market that week and what’s still on it. A seized engine is still a heavy block of metal, and a failed transmission still weighs what it weighs. What lowers the number is missing material: an engine already pulled, a transmission sold off, the wheels swapped for bald spares. Our guide to how scrap car value works explains each input.
So if you’ve decided to sell, sell it complete. And don’t try to nurse it to a buyer: we come to the car with our own tow truck, and the tow is free. The page on non-running cars covers cars that won’t start at all.
The clock in your driveway
A car that can’t be driven can become a village problem. In Crestwood an inoperable car left in public view is treated as a nuisance, and towns such as Palos Hills set their own limits. Our inoperable car rules guide compares them. If a notice is already on the windshield, the decision has a deadline.
Weighing a trade-in or a private sale as well? Junk it, sell it privately or trade it in compares all three. When you’re ready, send the car’s details for a scrap offer and mention what failed, or call (773) 394-1071.