Are used engines for sale to be properly reliable? Going first to a certified auto salvage yard or recycling plant-most of these salvage yards will test an engine and give it a warranty. LKQ, CarPart.com, and eBay Motors are among the online shops that carry a wide spectrum of engines and vehicle compatibilities. Maybe a reputable mechanic or an auto parts shop near you can be a good source for leads or tips on refurbishing. Always ask for the history, the mileage, and the warranty on an engine before buying it. Wherever you get that engine, local or online, look for places that will allow for easy returns and that have reviews. Smart buying means buying a good engine that saves your money and gets your car back on the road!