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What is the difference between a Rebuilt Engine and a Remanufactured Engine? |
| Throughout
this website you may have noticed
the statement that Dr
Motorworx uses only quality
remanufactured engines to extend
the life of your vehicle. We use
engines from sources with
excellent reputations such as Jasper,
GM
Goodwrench, and ACDelco,
to name just a few. When
considering engine replacement,
you may have noticed the terms "rebuilt"
and "remanufactured"
but thought the terms referred to
the same process.
There are major differences in engines that are rebuilt or remanufactured. Typically, a rebuilt engine will have a much shorter life than a remanufactured unit because the process is much less precise and therefore, less predictable. Rebuilding is done in local shops and depends upon the judgment and skill of the individual mechanic. Parts believed to be serviceable are cleaned and reused; only worn or broken parts are actually replaced. If reused components subsequently fail or break, diagnosis and repair can be very costly. Remanufacturing is a very exacting factory process where engine and component parts are completely disassembled, thoroughly cleaned, carefully inspected, and conditioned and machined to OEM tolerance specifications. The finished engine is tested using state-of-the-art computerized equipment. Remanufacturing is similar to building a new engine; simple replacement of parts, or rebuilding, will not result in the same high quality product that is produced by the remanufacturing process. How
is it done? The remanufacturing
process begins with a
sound, undamaged engine "core"
The
cleaned and reconditioned or new
parts are reassembled to what is
known as the "long
block" assembly.
The
Among the new parts in a quality remanufactured engine are piston and pins, piston rings, connecting rod bearings, main and camshaft bearings, pushrods, the timing gear and chain (where applicable), valve lifters, gasket and seals, freeze plugs, and oil pumps. Valves, springs and guides, along with crankshaft and connecting rods are either remanufactured or replaced. Cylinder heads are cleaned and resurfaced, cylinders are bored and valve seats are resurfaced. Once assembled, a remanufactured engine must also meet factory specifications during oil pressure, compression, and vacuum testing. If your vehicle is in good shape but your engine isn't, replacing your engine with a remanufactured one is probably the only way you will have "new car" performance. We at Dr Motorworks recommend remanufactured engines because they insure greater customer satisfaction than rebuilding the old one. Not only is a quality remanufactured engine restored to original specifications, due to improvements added by the manufacturer the end product can be better than a new engine of the same type. |
that
is dismantled to the smallest
component and then carefully
cleaned, conditioned, and machined
to OEM tolerance specifications.
Each reusable part is machined to
original manufacturer tolerances.
Throughout the process, the parts
are continuously inspected for
hidden damage and removed from the
process if tolerances are not
maintained. A core is shown to the
right.
long
block is the heart of the engine and
when installed, is connected to
the other parts of the vehicle,
such as the exhaust, fuel systems,
and electrical systems. A long
block assembly is shown to the
left.
