Used Engine Warranty Explained: What's Covered
June 5, 2026 • Used OEM Engines
A warranty is your safety net when buying a used engine. But not all warranties are equal, and what they cover (and exclude) matters. Here is how a used engine warranty actually works.
What's typically covered
A standard used engine warranty covers internal mechanical failure of the long block under normal use — the block, crankshaft, pistons and heads. Many sellers offer a 12-month term, with extended coverage available.
What's usually NOT covered
- Labor (unless you buy a labor warranty)
- Accessories not supplied with the engine
- Damage from improper installation
- Neglect, overheating or running low on oil
How to protect your warranty
Install professionally or follow the install checklist, replace wear items, prime the oil system, and keep your receipts and service records. These steps keep your coverage valid.
Frequently asked questions
How long is a used engine warranty?
Commonly 12 months on the long block, with extended terms available on many engines. Always get the terms in writing.
Does a used engine warranty cover labor?
Usually not by default. Labor coverage is sometimes available as an add-on — ask before you buy.
What voids a used engine warranty?
Improper installation, skipping required wear-item replacement, overheating, or running the engine low on oil can void coverage.
The bottom line
Buy with a written warranty and follow the install steps to keep your coverage intact. Call 999-999-9999 or request a quote with your year, make, model and VIN for a guaranteed-fit price.