What you may not know about Scotch-brite discs
Time is money! Therefore, any method of making a job easier or quicker is often employed. But, when the quality of the job is jeopardised or there is a risk of down-time, or extra expense in the future, the shortcut is simply not worth it. Such is the case with the use of Scotch-brite discs for the removal of gasket material on block, head and manifold surfaces.
Many mechanics are unaware of the damage which can be caused by using Scotch-brite discs.
Despite claims that the Scotch-brite discs are non-abrasive, they do have the ability to wear away the surface of the block, head or manifold which is being cleaned. The problem is, the disc does not wear away the surface evenly. Often it is applied to specific area where stubborn pieces of gasket material remain. This creates dips in the surface. When the disc is used near the edge of the surface or near holes such as water jackets, the corners of the surface are rounded off. Dips and rounded corners on a flat surface create gaps between the face and the new gasket when the engine is reassembled. These gaps mean that there is an improper seal which leads to gasket failure. Gasket manufacturers will void all warranty if scotch-brite discs have been used. The diagram shows an exploded view which illustrates this non-sealing principle further.
In order to remove the dips and rounded corners produced after using a scotch-brite disc, the surface has to be properly machined. Material is evenly skimmed from the surface of the object until a perfectly flat surface is achieved. In cases where these dips are deep, there is a lot of material which must be removed. An imperfection which is .008" deep means that .008" has to be skimmed from the surface of the component to achieve a flat surface. Machining large amounts of material from the top of a block can lead to piston height clearance problems and increased compression ratio.
Scotch-brite discs should NOT be used.
This picture shows the extent of the damage which can be done. The imperfections are still evident after .008" has been machined from the surface of this block.
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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