Softness Of Aluminium Heads

Aluminium heads are common components in modern engines mainly due to the weight advantage they have over cast iron heads.  The weight of the vehicle is a major factor a manufacturer will consider in design.  A lighter vehicle requires less force to drive it and is therefore more efficient to run.  Try picking up an aluminium head and then a cast iron head - you will certainly notice the difference!

A change in construction material of a component means that different elements need to be considered when reconditioning the engine.  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.  Particularly in cases where the engine has experienced extreme temperatures, such as when it has been overheated, the aluminium changes its characteristics and becomes "annealed" (loses its hardness).  It is vital that a "soft" aluminium head is not reused as it is impossible to achieve a correct seal between the head and the block.  This is basically due to the fact that the metal in the head has lost its strength, and subsequently, its ability to clamp effectively. An improper seal means head gasket failure which could cause considerable damage to your engine.  The cost of rebuilding an entire engine is not worth risking for the simple process of checking the head first.

At Galloway Engines, we use a digital hardness test to ensure that aluminium heads meet the vehicle manufacturers' specifications.  Manufacturers use a variety of metals and composites in their castings and consequently heads anneal at different temperatures.  If your engine has been overheated, your head is showing signs of being "soft" or you would like the reassurance of knowing that you are not going to have future problems, call in and see us at Galloway Engines, and we can perform a quick test to determine the condition of your aluminium head.  Piece of mind is as easy as that!

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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: