A used engine warranty is the one thing standing between you and a very expensive bad day. You can buy the right engine at a fair price, have it fitted by a good mechanic, and still get unlucky. When that happens, the warranty is what you fall back on. So it is worth knowing what one really covers before you pay, not after something goes wrong.
We sell used engines to customers all over the world, and every engine we sell comes with a 6-month limited used engine warranty. Want to see what is in stock? Head to our used engines for sale or browse the shop.
Below is a straight explanation of how a used engine warranty works, what it normally includes and leaves out, the small print that catches people, and how to make a claim without a fight.
Table of Contents
What a Used Engine Warranty Actually Is
A used engine warranty is a written promise from the seller. It says that if the engine fails because of a defect inside the engine, within a set period, the seller will do something about it. Usually that means a replacement engine or a refund. Sometimes it means paying for the repair of a specific part.
It is not insurance, and it is not a promise that nothing will ever go wrong. It covers defects that were already in the engine when you bought it, or failures of the engine’s own parts during the warranty period. It does not cover damage caused by something else, like a bad install, an overheating radiator, or the wrong oil. The general idea of a warranty is the same everywhere. The details vary a lot from seller to seller, which is why reading them matters.
Our Used Engine Warranty in Plain Words
Here is what we offer, without the legal language. The full wording is on our terms and services page, and that page is what counts if there is ever a question.
- Length: 6 months limited warranty on used engines.
- Returns: accepted within 30 days of purchase when the engine has been installed and tested following proper procedures, and the problem is confirmed to be a defect in the engine itself, not the installation.
- Arrived damaged or faulty: contact us straight away and we arrange a replacement or a full refund.
- Labor: not covered. We do not pay for fitting or removal. This is normal for a used engine warranty, but you should know it going in.
- Claims: contact our team within the warranty period and we take it from there.
The return rules are also on our refund and returns page. If anything there is unclear for your situation, ask us before you order. We would rather answer the question up front than argue about it later.
7 Facts About Any Used Engine Warranty
1. Labor is almost never included
This is the one people are most surprised by. Swapping an engine can cost as much as the engine itself, sometimes more. Nearly every used engine warranty on the market excludes labor. A few sellers offer paid add-ons that include some labor, and those can be worth it for complex engines. But the basic used engine warranty covers the part, not the work.
2. The clock usually starts on the purchase date
Not the day you install it. If the engine sits in your garage for two months before your mechanic gets to it, you have used two months of cover. Plan the fitting before you order, especially if the engine is shipping overseas and customs will add time.
3. Service items at install are often required
Most sellers expect fresh oil, a new oil filter, new coolant and, on belt-driven engines, a new timing belt and water pump at installation. Some want receipts. This is not the seller being difficult. Old fluids and an old belt are two of the most common reasons a good used engine fails in its first month.
4. Overheating usually voids it
Almost every used engine warranty excludes damage from overheating, running low on oil, or running with no coolant. A failed head gasket after the engine was cooked is not a defect in the engine. That is why fixing the cause of the old engine’s failure before the new one goes in is so important.
5. Modifications can void it
Tuning the ECU, fitting a bigger turbo, or racing the car will usually end your used engine warranty. That is fair, because the engine is no longer working as designed. If you plan to modify, enjoy it, but do not count on the warranty.
6. Paperwork is everything
Keep the invoice, the shipping documents, the mechanic’s receipt for the install and the receipts for oil and parts. Take photos of the engine when it arrives. A used engine warranty claim with full paperwork is usually quick. One without it can drag on.
7. A warranty is only as good as the seller
A 3-year used engine warranty from a seller who never answers the phone is worth less than 6 months from one who does. Look at how long the seller has been around, whether they have a real address and phone number, and whether the terms are written on their site where anyone can read them.
What a Used Engine Warranty Usually Covers
Every seller writes their own terms, so always read the actual wording. In general, a used engine warranty is aimed at the parts inside the engine that you cannot inspect from the outside. Across the industry, these are the parts most often included:
| Usually covered | Often not covered |
|---|---|
| Engine block | Labor for removal and fitting |
| Cylinder heads | Sensors and electrical parts |
| Crankshaft and bearings | Gaskets and seals |
| Pistons, rings and rods | Turbochargers and superchargers |
| Camshafts and valvetrain | Injectors, fuel pumps, starter, alternator |
| Oil pump | Belts, hoses and fluids |
That is the typical pattern, not a promise of exactly what any one seller includes. If a part matters to you, like the turbo on a diesel, ask the seller directly whether it falls under their used engine warranty. Ask us too. We will give you a straight answer for the engine you are looking at.
Specifications and Install Notes for Popular Engines
Whether an engine has a timing belt or a timing chain changes what you need to do at install to stay inside most warranty terms. Here are some engines we sell regularly, with their basic specifications and our install notes.
| Engine | Displacement | Layout | Power (approx.) | Cam drive | Install note |
|---|---|---|---|---|---|
| Toyota 1KD-FTV | 2,982 cc | I4 turbo diesel | 161 to 171 hp | Belt | New belt kit and water pump, check injectors |
| Toyota 1GR-FE | 3,956 cc | V6 petrol | 236 to 285 hp | Chain | Fresh oil and filter, check for chain rattle at cold start |
| Mercedes M272 | 2.5 to 3.5 L | V6 petrol | 201 to 315 hp | Chain | Ask about balance shaft gear on early engines |
| Nissan VQ40DE | 3,954 cc | V6 petrol | 261 to 270 hp | Chain | Fresh oil, coolant and thermostat |
| Toyota 2JZ-GTE | 2,997 cc | I6 twin turbo | 276 to 320 hp | Belt | New belt kit, keep stock tune to protect cover |
| Isuzu 4JJ1 | 2,999 cc | I4 turbo diesel | 130 to 177 hp | Gear and chain | Fresh oil, check injector seals |
| 6.7 Powerstroke | 6,651 cc | V8 turbo diesel | 390 to 475 hp | Gears | Fresh oil and fuel filters, inspect fuel for contamination |
On the Mercedes M272, early engines had a known balance shaft gear wear issue. Later engines were updated. If you are buying one, ask which version it is. Our guide to the Mercedes M272 engine for sale covers this properly.
How to Keep Your Used Engine Warranty Valid
Most claims that get turned down are turned down for the same handful of reasons. You can avoid nearly all of them.
- Use a qualified mechanic. A proper workshop with a receipt. It protects you if there is ever a dispute.
- Change the oil and filter at install. Use the grade the manufacturer specifies. The right motor oil is cheap compared to an engine.
- Replace the coolant and thermostat. Flush the radiator too. Old coolant and a sticky thermostat are a common way to cook a good engine.
- Do the timing belt on belt engines. Unless there is written proof it was done recently.
- Prime the oil system before first start. Especially if the engine has been sitting. Crank it with the fuel or ignition disabled until you see oil pressure.
- Check for leaks and watch the temperature on the first drive. Most problems show up in the first hour of running.
- Change the oil again early. After the first few hundred kilometres. It flushes out anything left over from storage.
- Keep every receipt. Put them in one folder. You will thank yourself if you ever need your used engine warranty.
How to Make a Used Engine Warranty Claim
If something goes wrong, do not keep driving. A small problem becomes a big one quickly, and continued driving with a known fault can end a claim. Then do this:
- Stop the engine and get it checked by your mechanic.
- Ask the mechanic to write down what they found and what they think caused it.
- Take photos or a short video of the problem if you can, for example a knock, smoke, or a leak.
- Contact the seller with your invoice number, the mechanic’s notes and the photos.
- Do not strip the engine down before the seller agrees. Taking it apart early can make it hard to prove what failed.
With us, you contact our team through the contact page or by email, within the warranty period. We look at what you send, may ask for more information, and tell you what happens next.
Used Engine Warranty vs Rebuilt and Remanufactured Cover
Rebuilt and remanufactured engines often come with longer warranties than used ones. That makes sense, because they have been opened up and had worn parts replaced. They also cost more, often a lot more.
| Engine type | Typical price level | Typical warranty length | Good for |
|---|---|---|---|
| Used | Lowest | Shorter, often months | Daily drivers, work trucks, tight budgets |
| Rebuilt | Middle | Longer than used | High-mileage cores, performance builds |
| Remanufactured | Highest | Often the longest | Fleets, newer vehicles, buyers who want maximum cover |
For most people, a good used engine with a fair used engine warranty is the best value. You save a big chunk of money up front, and the engines that fail usually fail early, which is exactly when the warranty is in force. If you want to compare properly, read our guides on rebuilt vs used engines and remanufactured vs rebuilt engines.
Extended Warranties and Third-Party Plans
Some buyers ask whether they should buy a separate service contract on top of the seller’s used engine warranty. Sometimes it makes sense, for example on an expensive engine in a vehicle you plan to keep for years. Read the contract carefully. Many third-party plans have their own exclusions, waiting periods and claim limits. Make sure you know who actually pays out, and whether they cover the engine you are fitting, since some plans only cover the engine the vehicle left the factory with.
Red Flags in a Used Engine Warranty
These are the things that make us suspicious when we read other sellers’ terms:
- No written terms. If the used engine warranty only exists in a chat message, it barely exists.
- Huge cover at a tiny price. Long warranties on very cheap engines often come with exclusions that make them almost impossible to claim.
- Vague wording. “Guaranteed good” is not a warranty. You want a length, what is covered and how to claim.
- Restocking fees hidden in the return section. Some sellers charge a big percentage to take an engine back. Find out before you buy.
- The claim has to be made in an impossible window. For example within 48 hours of delivery, before most people have even fitted the engine.
Buying Tips That Matter More Than the Warranty
Here is something sellers do not usually say: the best used engine warranty is the one you never need. A few choices up front reduce the odds of a claim far more than any length of cover does.
- Match the engine code. Wrong engine, wrong fit, and a claim that will not be accepted.
- Ask about mileage and testing. Our guides to low mileage used engines and tested used engines explain what to ask.
- Know the full cost. Engine, fitting, fluids and parts. Our guide to replacement engine cost puts real numbers on it.
- Buy from someone you can reach. Before you buy used engine online, call the number on the site and see who answers.
Engine Guides With Warranty Notes
These guides cover specific engines, including the problems to watch for and how buying from us works:
- Used 1KD-FTV engine for sale with warranty
- Used Toyota 1FZ-FE engine for sale with warranty
- Used Nissan TD42 engine for sale with warranty
- Used Mercedes M273 engine for sale with warranty
- Used Toyota 4GR-FSE engine for sale with warranty
- 6.7 Powerstroke engine for sale guide
A Real Example of How a Claim Goes
Here is the sort of thing that happens, with details changed. A customer fits a used V6 into an SUV. Two weeks later there is a tick from the top end at idle. He stops driving and calls his mechanic, who records a short video and notes that one lifter is noisy and oil pressure is normal. The customer sends the invoice number, the mechanic’s note and the video. The seller looks at it, asks a couple of questions about the oil used and the install, and agrees it is an engine fault covered by the used engine warranty.
Now the same story without the paperwork. No mechanic’s note, no receipt for the oil change, and the customer kept driving for another week until the tick became a knock. That claim is a lot harder, and it is not always because the seller is being unfair. Nobody can tell anymore what caused what.
The difference between those two stories is about 20 minutes of effort.
What Your Mechanic Should Check on Delivery Day
Before the engine goes anywhere near your car, give it a proper look on the floor. It takes half an hour and it can save you weeks.
- Turn it over by hand. Put a socket on the crank bolt and rotate it two full turns. It should feel smooth and even, with the same resistance on each compression stroke. A hard spot or a clunk is a reason to call the seller before fitting.
- Look inside the ports. Shine a torch into the intake and exhaust ports. You are looking for dirt, water or anything that should not be there.
- Check the oil. Pull the dipstick and the filler cap. A little dark oil is normal. A milky, coffee-coloured mix is not.
- Compare it to your old engine. Line them up side by side. Mounts, sensors, connectors, the flywheel or flexplate, the oil cooler. Anything that is different needs to be sorted now, not halfway through the job.
- Photograph everything. Engine number, all sides, any marks. Those photos are part of your paperwork.
If something looks wrong, stop and contact the seller. Fitting an engine you already had doubts about makes any later conversation much harder for both sides.
Common Problems in the First Month and What They Usually Mean
Most used engines that are going to give trouble do it early. Here is what we hear about most often, and what is usually behind it.
Oil leak from the front or rear of the engine. Very often a dried-out crank seal. Engines that sit for a while can weep from seals that were fine in the car. It is a cheap part, and a good mechanic will usually swap the rear main seal while the gearbox is off anyway.
Rough idle or a warning light straight after install. Usually a sensor, a vacuum leak or a plug that did not get connected properly. Read the fault codes with a scanner before assuming the engine is bad. The on-board diagnostics system will often point straight at the problem.
Ticking from the top end. On many engines, hydraulic lifters tick for a few minutes after a long time sitting, then go quiet once oil pressure builds. If the noise stays after the engine is warm, get it checked.
Running hot. Air trapped in the cooling system is the usual cause on a fresh install. Bleed it properly. If it keeps happening, check the radiator, fan and thermostat before blaming the engine.
Smoke on start-up. A puff of blue smoke that clears is often valve stem seals or oil that pooled while the engine was stored. Constant smoke is a different story and should be looked at.
None of this means the engine is bad. It means a fresh install needs a bit of attention for the first few weeks, which is exactly what any experienced mechanic expects.
Used Engine Warranty Questions We Get Asked
How long is your used engine warranty?
Six months, limited. It applies to every used engine we sell, wherever we ship it.
Does the used engine warranty cover labor?
No. Labor for removing and fitting engines is not covered. That is standard for used engines.
Does shipping overseas affect my warranty?
No, the cover is the same wherever you are. Just remember the period counts from the purchase date, so plan your install.
What if the engine arrives damaged?
Contact us right away, keep all the packaging and take photos. We will arrange a replacement or a full refund for engines that arrive damaged or defective.
Can I return an engine I no longer need?
Our returns are for engines with a confirmed defect. If you order the wrong engine, contact us and we will help sort it out, but return shipping may be on you. Check the code before ordering and this will not come up.
Is a longer used engine warranty always better?
Not always. Look at what it covers, what voids it and how easy it is to claim. A shorter, clear warranty from a seller who answers the phone can be worth more than a long one full of exclusions.
Get an Engine With a Used Engine Warranty You Can Read
A used engine warranty should be easy to find, easy to read and easy to use. Ours is on our website for anyone to check before they spend a cent. If you need an engine, browse our used engines, look around the shop, or send us your engine code. We will tell you what we have, what the used engine warranty covers for that engine, and how quickly we can ship it to you, wherever you are.