Engine Blueprinting

Back in the days prior to the computer age, an engineer would draw an engine design on blue draft paper - hence the name blueprint.  The blueprint is the original design specifications of an engine.  Blueprinting is an exact science which involves modifying the engine to comply with its original manufacturers design tolerances and/or any newly developed specifications which increase the engines operational efficiency.

All engines are manufacturered to fall within a range of tolerances which are set by the design engineer on the blueprint.  A certain degree of precision can be lost when a vehicle comes from a production line, as there are greater tolerances (a greater range from which the component is measured to compy with) allowed during this process.  You may have heard stories where people have bought identical brand new vehicles yet one runs better than the other.  The better efficiency and/or performance often means that the engine was slightly better built, i.e. the engine design met the exact design parameters more accurately.  Because such a fine line can create a big difference, engines are "blueprinted" to take advantage of the greater efficiency and performance which is able to be achieved.

A standard engine will run perfectly fine operating within manufacturers' tolerances.  However, it is an entirely different story for an engine rebuilt for race or performance applications.  When rebuilding a high performance engine, it is important to take into consideration, a performance or race engine will be subjected to extreme conditions while it is being operated.  The components of the engine need to operate within precise tolerances and measurements to perform this type of operation effectively.  Close enough is not good enough. Having the engine meet the exact design parameters with which it was designed and eliminating any discrepancies in tolerances, gives the engine a performance and efficiency advantage.

At Galloway Engines, we believe that precision work can only be achieved on quality machines.  We have maintained a continuous machinery update policy since 1978 to ensure only the best work is produced.

Introducing our Rottler F67A CNC Machine.  This machine offers state of the art machining capabilities, specifically designed for high performance blueprinting operations.

The Rottler F67A CNC Machine blueprinting capabilities include operations such as:


Deck squaring to the main and cam centreline

The deck is machined perfectly parallel to the main bore centreline, while correcting any deviations in deck angles. The deck is also height matched, with both decks exactly the same distance from the main centreline.  For more information on surface finish, click here.


Boring cylinders to main and cam centreline

The CNC boring fixture machines each cylinder bore, not only to the desired diameter, but corrects any alignment issues as well, in terms of bore centreline location and bore angle


Line boring

The patented Rottler right angle drive on the cutting head delivers a more accurate, straighter cut than boring using the traditional boring bar method.


Bore centre corrected to blueprint specifications

CNC probing records existing cylinder bore location.  This dimension can then be compared to design data, instructing the machine to then bore to correct centerline and angle if needed.


Lifter bore corrections

Machining factory lifter bores true to the camshaft centreline can create smoother running and therefore increase horsepower.  For more information on lifter bore modifications, click here.

Galloway Engine's have a fully equipped workshop with machinery which can carry out other blueprinting processes, such as:

Dynamic Engine Balancing   

See the article "Spin Doctors" for more information on this process.

Torque Plate Simulation Process  

For more information on the perfect bore finish, see the article "Finishing Touch" .


Line Bore Honing    

For the perfect finish for the mains tunnel.

Blueprinting an engine is a detailed process which represents a major investment in your engine.  Part selection is critical and it is essential that processes are undertaken to ensure the perfect parts are selected to be installed into your blueprinted engine.

Magnetic Crack Testing

The slightest imperfection will effect your engines performance and reliability greatly.  There is simply no margin for error.  This crucial set of conditions requires far more detail than what can be seen by the naked eye.  For more information on crack testing, click here.


 Ultrasonic Testing

An engine consists of many inaccessible areas where tools of measurement are simply unable to reach.  For more information on ultrasonic testing, click here.


 Digital Hardness Testing

Aluminium has different chemical properties to cast iron and it is known that it expands and contracts quicker when it heats up and cools down.  This quicker cycle of expansion and contraction can cause the material to become stressed. For more information on digital hardness testing, click here.


Contact us for more information on how we can assist you to meet your engine performance and efficiency requirements.

   What's Happening


  WE MADE THE FINALS!   Galloway Engines has been named as a finalist in the Peel CCI business excellence awards for 2016 in the category of 5-10 employees. We are up against some tough competition from around the Peel region but...


Frequently Asked Questions

How do I know if my engine needs reconditioning?

Tell-tale signs that your engine requires attention are that it has lost performance or efficiency, it blows excessive smoke or it has developed an unusual noise.  However, a vehicle needn't have these symptoms to benefit from a reconditoned engine.  A complete and comprehensive recondition of your engine will increase power, fuel efficiency and extend the life of your vehicle.

Do you remove and refit engines?

Galloway Engines is a precision workshop which deals in machining and reconditioning engines.  This ensures we are specialists in our field and only a quality job of the highest standard will be delivered.  We can arrange engine removal and fitment or contact your regular vehicle servicing centre for this service.

Can I supply my own parts?

Yes. You are quite welcome to supply your own new parts should you have a preference for a particular brand name.  However, our parts prices are very competitive and our high standards ensure that only quality parts are fitted to any job.  We have liaisons with many Australian and international companies allowing us to have access to world-wide sourcing of parts.

Do you offer a warranty?

Any reputable product will come with a warranty as proof of its quality.  Galloway Engines are no exception.  We offer a full warranty on all of our work.  Contact us for more information on the terms and conditions of our warranty.

Why should I use Galloway Engines?

Galloway Engines supply a quality engine which is completely reconditioned to comply with original manufacturers specifications and are in accordance with Australian Standards AS4182 for petrol engines and AS4427 for diesel engines.  Our up-to-date equipment produces quality precision work and our team of specialised technicians are dedicated to detail.  This ensures you are getting the best job possible.

Can you recondition any engine?

Yes. Whether it be a Caterpillar engine from a giant earthmoving machine or a small three cylinder Suzuki engine, we have the equipment to be able to meet your needs.  Contact us to see how we can meet your requirements.

Do you offer engines which suit LPG?

As LPG has different properties to unleaded fuel, an engine can experience problems when converted to LPG.  We can offer options which can enhance the performance and reliability of an LPG engine.  Galloway Engine Reconditioning also stock a range of exchange heads which are modified to run on LPG.  

Do you have EFTPOS?

We have full EFTPOS facilities available and are able to accept payment via Credit or Debit Card.


  • Address:

    Galloway Engine Reconditioning,
    25 Baker St,
    Pinjarra WA 6208
  • Phone / Fax:

    08 9531 1366
    08 9531 2321
  • Email: