A rebuilt engine is one (usually with low mileage) that has been dismantled, cleaned, inspected, and its parts repaired or replaced to meet current manufacturer’s specifications. Rebuilding an engine takes a lot of time by skilled technicians. However, it is still less expensive than purchasing a new replacement engine–or buying a new car. Because the rebuilding process means some parts may be brand new, slightly used, or original to the engine that has been rebuilt, most manufacturers offer a warranty on their rebuilt engines, but not covering the same time frame as a new engine. Installing a rebuilt engine in your car will extend its life. It is a very cost effective solution if you know you have serious problems with your current engine.
To qualify as “rebuilt” or remanufactured, the engine will be worked over by a mechanic who will either save, replace or fix the parts based on current wear or damage. Whether the engine is for a car or a boat, only the original manufacturer can “remanufacture” it. Very specialized machining ensures that every part works well. A rebuilt engine is next in quality to one that is remanufactured. This is very different from an overhauled engine which may only contain a few replacement parts and rarely involves machining any of the older parts.
If you need a rebuilt engine for your car, be careful about what you purchase! Look for companies that provide engine parts and services at competitive prices. You also want them to have technical engine expertise, and outstanding customer service so that you receive the best value package available. You can get a wide range of engine products and services–from main bearings and master overhaul kits–to complete replacement engines.
Quality remanufactured engines should include:
- New main bearings and cam bearings, rod bearings, oil pumps, freeze plugs, lifters, valve guides, timing components, gasket sets, rings, and pistons
- Connecting rods that are resized and honed to O.E.M. requirements after being checked for bend or twist
- The crankshafts are reground to original specs, polished, with oil hole chamfered to rigid specifications
- Valve seats are three-angle cut to provide optimum sealing
- If all new valves are not installed, the valve stems are centerless ground, butt-cut, and chamfered for optimum clearance and oil control
- The blocks should be magnafluxed assuring that unseen cracks don’t cause premature failure, and shot blast cleaned
- All blocks must be Line honed, the block deck and cylinder heads resurfaced, insuring a proper seal
- New cams installed on flat tappet OHV applications
- All rebuilt engines must have been 100% functionally tested
- Quality replacement parts should be used throughout
A good rebuilt engine is comprised of only premium parts. Reputable companies remanufacturing engines will provide a warranty on their products. Many companies feature a 3 year/100,000 mile manufacturer’s warranty. Some even extend an extra 2 years’ labor warranty coverage as an added bonus.
Any knowledge you acquire prior to your purchase will help you to make a wise decision when the time comes to choose your rebuilt engine. Online sites such as Best Rebuilt Engines and Precision Engine provide information on what to look for to ensure you engine purchase lasts like a high quality rebuilt engine should. Once your rebuilt engine is purchased and installed, you can begin enjoying a like-brand-new car again!
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