Frequently Asked Questions (FAQs)
Q. What is a remanufactured engine?
A. A remanufactured engine is exactly that – an engine
which has been returned to the manufacturer’s specification to provide
levels of performance, reliability and life similar to that of the original
It is not a "replacement", "exchange" or "rebuilt"
The British Standard Automobile Series Code of
Practice BSI AU 257:2002 fully details how for spark and compression
ignition (diesel) engines, components shall be inspected and checked against
manufacturers tolerances. Key components including piston assemblies, big
and small end bearings / bushes, gaskets, seals , timing chains and drive
belts are renewed whilst items such as tensioners and dampers are checked
and replaced where necessary.
operations such as crack testing machined components or deburring reworked
oilways ensure original performance is achieved with reliability.
As well as having all key clearances, tolerances and end floats checked
after assembly complete engines are also required to be checked for oil
pressure and compression.
Finally, remanufactured engines
offer the additional advantage of having their own unique serial number
stated in the accompanying documentation which details renewed components,
completion date, test records and relevant instructions.
Is a remanufactured engine different from a rebuilt one?
A. Yes. A remanufactured engine has gone through a rigorous programme of
cleaning checks etc. A rebuilt engine, although perhaps suitable for some
applications, will not be to the same standard.
Q. Why is a remanufactured engine better?
A. Because it has been built to a much higher standard with new components
and tolerances to the manufacturer’s specifications.
Q. Can all engines be remanufactured?
A. Generally yes, but it depends on the damage that may have been done to
the engine. For example, if a conrod has gone through the side of the block
than the block cannot be reused.
Q. How long does it take to remanufacture an engine?
A. This depends very much on the engine size and specification, but
typically 3 to 5 days.
Q. When a engine is remanufactured, is it my own engine that I get back?
A. This depends on what you have agreed with the member. In most situations
it will be your engine. The member, however, will consider the work that
needs to be done and work out a cost for this. In some cases it may be a
less expensive option to have an exchange engine. In this case you will not
get your own engine back.
Q. What is an exchange engine?
A. An exchange engine is just that. Within the industry there are companies
that remanufacture engines on a production line basis. This gives them
economies of scale that allow them to market engines at prices lower than
taking an engine and remanufacturing it from scratch. In this instance your
engine is sent to them on an exchange basis for them to remanufacture.
Q. Is that a good thing?
A. A very good thing. Remanufacturing engines is a very ‘green’ thing to do.
From the collecting of the raw materials, to making the steel, to making the
engine itself, an enormous amount of energy goes into this process. It goes
without saying , therefore, that a huge amount of energy is saved by
remanufacturing. Good for the pocket and good for the planet.
Q. Is it only the engine that is remanufactured?
A. No. It is possible to remanufacture a cylinder head or a short engine.
Both would be remanufactured to the same standard as a complete engine.
Again, exchange units are available if that is better for the situation.
Q. What else should I consider when having my engine remanufactured?
A. You will need to consider that if, for example, your vehicle is eight
years old, when you fit the remanufactured engine it will be as good as new
and work as efficiently as new. Not so the other parts and ancillaries to
the engine, which are still eight years old. The classic example is the
water pump. When a remanufactured engine has been fitted and connected to
the water pump it will probably be driving harder that when the engine was
taken out. This could lead to failure and subsequent loss of coolant, which
in turn could cause damage to your newly remanufactured engine. Make sure
you speak to your supplier and ask his advice on what else should be done to
ensure the best job. Remember, if you are paying to have the engine
remanufactured it pays to be sure everything else will keep up with it.