Engine Reconditioning & Rebuilding

Operating Hours

Mon - Fri 07:00 - 16:30

Why line boring machines aren’t boring


Line boring: a fascinating trade with an unfortunate name. For those who are complete strangers to the concept, line boring machines are used to enlarge holes that have already been cast or drilled into a variety of substances. Large-scale boring is commonly used when drilling underground subways, and in the Eagleharm Engineering workshop we use our line boring machine to refurbish damaged engine blocks. Let’s take a look at a few facts that might just take the ‘bore’ out of line boring:

  1. They’ve been around since the 1700s

It was John “Iron-Mad” Wilkinson who, way back in 1775, introduced the concept of precision boring. Wilkinson was an industrialist in England at the time, and was a pioneer of cast iron goods during the Industrial Revolution. His precision boring invention, that changed the world of machining forever, is considered to be the first-ever machine tool.

  1. There’s more than one type of boring

Two main types of boring are used today, namely line boring and back boring. In back boring, the bar is supported on one end. When it comes to line boring, the bar is supported from both ends – and line boring only works if the existing hole is a through-hole (back boring works even if it’s a blind hole.

  1. There are multiple machines that bore

Line boring devices are many, and come in various different shapes and sizes. For example, Eagleharm Engineering’s new TS-1000 CNC line boring machine from T&S Machines uses a right angle line boring system for precision boring. Then there are tools like lathes, milling machines, boring mills, and jig borers.

  1. They have multiple purposes

Something countless people ask, once you grab their attention with a snazzy-sounding title like TS-1000 CNC, is what the machine can actually do. We use ours to refurbish engine blocks from a range of industrial vehicles, including trucks and earth-moving equipment. Line boring machines are also used for excavator buckets, turbine casings, gearboxes, and others.

At Eagleharm Engineering, we ask one question: why replace when you can repair? Our machining capabilities enable us to refurbish any engine block – no matter the size – to manufacturer specification. We’re a trusted name in the industry, and we’ve been around for over 50 years. Also, with our new programmable TS1000 CNC, engine block line boring is literally twice as fast. Get in touch with Ryan or Todd to start a project with us!

It’s official: We’re better at engine block boring services!


The recently relocated Eagleharm Engineering workshop has a new machine: a huge TS1000 CNC boring mill from T&S Machines and Tools, Inc. This thing truly defines next-generation industrial engine boring, and reduces the time it takes to finish most machining jobs by more than a bit. Like with any new machine, we decided to take some photographs, which we have on display if you carry on reading. It was a big investment, but the TS1000 CNC has completely enhanced our engine block boring capabilities, and we believe that it will help us deliver better customer service, too.

Meet the TS1000 CNC

Aptly named BlockMaster by its distributors, the TS1000 was designed with one goal: to machine any block. It has the ability to put the cylinders at perfect centre-to-centre positions, from whichever datum plane preferred (dowel pin, bell housing surface, main thrust surface, etc. It has a probe that automatically displays the size of the bores, which means no measuring for the operator. As a bonus, the TS1000 is able to engrave parts with no special programming tools needed. Our workshop is located at 44 Hillclimb Rd, Westmead, Durban .

Why it’s better

Imagine being able to bore the blocks on earth-moving machines, where the hardest part of the job is physically lifting it onto a platform. We can offer block boring services to clients in the road freight (transport trucking) industry now, as well as the earth moving industry. If it’s an engine block, and it needs machining, our machine can do it. Since starting to use ours, the TS1000 has meant that we can do block boring jobs in one fifth of the time it took us before. The quality of work has also been nudged up somewhat, with automation bringing algorithmic precision to each and every project.

What we can do with it

The TS1000 is perfectly programmed for the jobs that our Eagleharm Engineering workshop undertakes. We can bore almost any block from any engine, and we can do it quicker than ever before. We believe that you shouldn’t replace something if you can repair it, and we know that this machine is going to help us save our clients tons of money going forward. Whether you need line boring, re-boring or re-skimming, we’re fully equipped to see to your block machining needs.

PS: We’re also the only workshop in KwaZulu-Natal that has a TS1000! To offer our services to clients across the province, we are able to collect and deliver any parts you need machined. Get in touch with us to arrange a service, or to find out more about the TS1000’s capabilities.

Eagleharm Engineering is Moving!


Different Location, Same Service Excellence…

After offering engine reconditioning services in Durban for 50 years, operating from Springfield Park, EAGLEHARM ENGINEERING is relocating to WESTMEAD, PINETOWN.

Our new location allows us to continue offering you, our valued clients, exceptional engine refurbishing services at the competitive rates we are known for.

We’ll be opening our new workshop doors on the 2nd of April, 2019. Please find our new physical address below:

Unit 5

44 Hillclimb Road




>>>Find us on Google Maps right here<<<

We hope to continue delivering excellent engine reconditioning services for you and your company, and we look forward to seeing you at our new headquarters soon!



Ryan & Todd Harmsworth

An Engine’s Critical Parts & Their Functions


While every engine part plays a role in keeping your car healthy, certain parts play an especially important role. Your car is a complicated system that requires each major working part to function at an optimal level. Replacing worn or damaged parts will not only keep your car in better shape; it will also keep you and fellow road users safe on the road.

Keep reading to find out more about the most essential engine parts and their roles.

Critical Engine Parts & Their Functions

Some of the most critical engine parts and the function they serve within your car include the following:


This part is the system responsible for the operation of your car’s valves. Essentially, this part is comprised of components that help to optimise the timing and your performance of your engine. It includes smaller parts such as valves, rocker arms, pushrods, lifters, and camshaft, this system regulates your fuel intake, ignition, compression and waste by opening and closing your engine’s valves. Over time, the consistency and movements of the valvetrain start to decrease as the parts begin to wear. Badly timed valve openings can affect your car’s performance and even cause major damage to your engine, making this a highly important part to replace as soon as it begins to wear.


Connecting rods

Forming the link between crankshaft and pistons, connecting rods transfer fuel and forces to the crankpins on the crankshaft. This part pushes and pulls the piston in and out of the cylinder. The eye of the connecting rod on the piston side acts as a mount for the piston pin. This bit is often fitted with a connecting rod bush. These rods are also mounted with bearing shells that sit on the crankshaft pins. The large connecting rod eye splits in order to make it more easily mounted on the crankshaft. A drilled oil channel provides lubrication to the piston pins. These parts are vital to keeping your car running smoothly and need replacing if they bend or fracture or if there is damage on the bearing holder of the rod. Connecting rods can be replaced individually if no other rods are damaged.



These may seem like small parts, but engine gaskets are also essential in the smooth running of your car. These parts keep your engine running in optimal conditional. They help to prevent leaks from joined objects. Over time, they begin to experience wear and tear. When this happens, they get brittle and are more likely to crack. Your car is then far more prone to leaks. Keeping your gaskets replaced is one of the most effective ways to prevent this type of damage from affecting your car’s performance.


Breather hose

Situated within the engine, this pipe releases gases that are trapped within the car’s inner components. When fuel begins to build in a way that is allowed to build pressure, performance is jeopardised. Breather hose parts offer a way to release these gases, routing them back into the carburettor and keeping the gases from being released into the atmosphere.

Looking for quality parts that you can always trust? Contact us today to find the very best replacement engine parts in Durban and surrounds.

Eagleharm Engineering: How to Break In a Rebuilt Engine

How to Break In a Rebuilt Engine


The two most commonly used methods to break in a rebuilt engine are dynamometer or load bank testing. However, these methods of engine testing aren’t always possible. If a rebuilt engine isn’t broken in correctly issues can arise including high oil consumption, excessive smoking and overall poor engine performance. This blog article looks at how to break in a rebuilt engine without the use of a dynamometer or load bank…


Why Should You Break In a Rebuilt Engine?

The process of breaking in an engine involves forcing rings and cylinder bores to conform to each other, sealing the combustion gasses within the cylinders. Unfortunately, idling the engine for a period of time will not create the pressures needed. Without serious force, piston rings may not seal properly – resulting in poor oil control and diminished engine performance overall.


Dangers of Not Breaking In a Rebuilt Engine

Improper or inadequate breaking in of rebuilt engines causes what is known as ‘glazing’, which prevents piston rings from ever sealing correctly. Glazing refers to how hard oil and fuel deposits collect on the cylinder walls of an engine. Once this happens, the only way to rectify the issue is to dismantle the entire engine again and break it in correctly.


Just Rebuilt an Engine? Here’s How to Break It In:

Apply Make-Shift Loads

Most engine rebuilders agree that to correctly seal the piston rings, you need to focus on getting around 75% of full load on the rebuilt engine for a few hours – keeping idle time to a minimum. Ways of breaking in vehicular engines include:

  • Attach a heavy trailer, find a long steep hill, and drive up it once or twice.
  • Drive up to the speed limit as fast as you can then, while still in gear, release the throttle and let the vehicle coast to a complete stop.


Utilise Break-In Powders

They might be a little old-school, but many engine rebuilders still swear by them! We’re talking about break-in powders, like Caterpillar’s 7F5225 powder. Here’s how to correctly utilise a break-in powder when breaking in a rebuilt engine:

  • Reassemble and start the engine,
  • Loosen air cleaner on each bank of cylinders (leaving a gap between flange and inlet manifold),
  • Run engine at 800RPM and allow powder to be sucked slowly through gap (1.25 teaspoons per cylinder,
  • Tighten air cleaner, idle engine for 30 minutes, and it should be ready for service.


Call the Professionals

Still unsure if you’ve rebuilt your engine correctly and you’re concerned about proper breaking-in procedures? When in doubt, call a certified engine reconditioning specialist and get advice directly from the professionals. They should advise you on the best way forward, ensuring that you provide your rebuilt engine with the careful attention it deserves!


Engine Rebuilding Professionals in Durban

Eagleharm Engineering has been refurbishing engines of all makes and sizes for near on 50 years. We’re held to high standards of service efficiency, and therefore utilise only the most effective techniques to break in our rebuilt engines. Contact us today for more information on the fine art of engine reconditioning!

Repairing Engines Before Shutdown: Why It's Necessary

Repairing Engines Before Shutdown: Why It’s a Good Idea


Regardless of where or how internal combustion engines are used, they all need some TLC eventually. With a year-long maintenance plan, keeping both vehicular and machinery engines in good condition is effortless. Unfortunately, repairing under-performing engines is low on most priority lists come the final quarter of the year. This article looks at three reasons why repairing engines before shutdown is a seriously good idea…

The Benefits of Repairing Engines Before Shutdown

Pinpoint Critical Issues in Advance.

The first major benefit of repairing your vehicle or machinery engines before the year-end shutdown is that you’re able to pick up on any potentially critical issues before they become serious.

By assessing the condition of your engines before going on holiday, you can adequately prepare for any engine-related financial outlays you might be facing due to faulty components requiring replacement.

This is especially important should you be preparing to take on any large-scale, important projects in the first quarter of the new year.

Prevent Loss of Productivity.

Another serious benefit of repairing engines before shutdown is that you’re able to prevent future loss of productivity with pro-active maintenance work.

Too often engine failures are only picked up when there is a critical malfunction – sometimes leaving the item of machinery or vehicle out of action for weeks and even months in some cases.

By seeing to these engines before shut-down, and assessing their general condition, you can action the necessary remedies so long – preventing a future loss of productivity.

Maintain Engines at Cheaper Rates.

A final benefit of sorting out your engines before shut-down is that – in some cases – you can save thousands of Rands by doing so!

Many engine reconditioning experts and engine repairs providers will increase their prices on an annual basis. This increase is usually implemented from January of the new year.

So, by repairing your engines before you and your staff head off for a well-deserved year-end break, you stand to save a pretty penny should your engine repairs provider be increasing their prices in 2019.

Machine, Car & Bakkie Engine Repairs in Durban

Eagleharm Engineering has been repairing and reconditioning engines of all makes, shapes and sizes for near on 50 years. We are accredited engine remanufacturers, and take pride in each and every engine repair we perform. Benefit from pre-shutdown engine repairs by contacting us today!

Popular Engine Parts and Where to Find Them


Automobiles, like most mechanical devices, require maintenance from time to time. If we’re lucky, all we need is an oil change and the replacement of a few filters, and our vehicles are good to go. Other times, however, something critical goes wrong – damaging engine components and rendering the car immobile. When this happens, replacement engine parts are required. Here’s a list of popular engine parts people are always looking for, why buying refurbished engine components is a good idea, and where to get replacement engine parts in a jiffy…


Replacement Engine Parts That Are Always in Demand

Conrod Bearings: Connecting rod bearings are mounted in the big end of the connecting rod, facilitating the rotating motion of the crank pin.

Gaskets: Sealing devices within an engine that include timing cover gaskets, intake manifold gaskets, and exhaust manifold gaskets.

Engine Mountings: Pieces of strong angled metal attached to a vehicle’s shell that hold it’s engine in place.

Manifolds: Essential for the even distribution of air and fuel within each cylinder, as well as mounting the carburetors and fuel injectors (on modern engines)

Pipes & Hoses: Mainly used in older engines, these transport fluids and hot air in and out of the engine – as well as absorbing vibrations between engine and radiator.


Why Buy Refurbished Engine Parts?

Source Rare Engine Parts

Sourcing replacement engine parts from workshops that service engines means you gain access to refurbished parts that the shops don’t sell anymore. You could dig around your local scrapyards, or you could contact engine rebuilding workshops that service cars like the one you need a part for.

Save Money on Maintenance

Most people, when taking their car for maintenance work, will trust that the mechanic is sourcing the best replacement engine parts for the best price available. This, however doesn’t happen in every case. By sourcing your own engine parts, you can ensure you aren’t being overcharged.

Get Access to Professional Advice

By talking to engine refurbishers about your specific engine issue, not only can you get replacement engine parts for less – you’ll receive sound mechanical advice from people who make it their business to know the ins and outs of vehicular engines. Besides, a second opinion never hurt anyone.


Where to Find Replacement Engine Parts

Aftermarket part outlets, like Midas and Goldwagen, sell aftermarket vehicle parts for a range of makes and models. Most engine parts are new, and often require ordering directly from the vehicle’s manufacturers.

Online Engine Part Stockists

You can order popular engine parts online like most other things these days, and there are more than enough providers to ensure you’ll find what your looking for. Make sure you check the part serial numbers to ensure you’re buying the right thing.

Engine Refurbishing Workshops

Another way to find the engine replacement parts you’re looking for is to call your local auto mechanic workshops. They’re always servicing all sorts of cars and engines, and might have a refurbished version of the part you need.


*Looking for rare engine parts in Durban? Visit Eagleharm Engineering at our engine reconditioning workshop today!

Accredited Engine Remanufacturers

Why Choose Accredited Engine Remanufacturers?


While people like Dutch physician Christian Huygens were experimenting with internal combustion engine technology as early as the 1600s, the first gasoline engine that could be run continuously through spark-ignition was developed circa 1859. Since then, the engine remanufacturing and reconditioning industry has grown alongside that of engine manufacturing. So, when faced with the choice between getting your engine refurbished by accredited engine remanufacturers and the back-yard guy down the street, here are a few things to consider…

High Standards.

One serious benefit to using accredited engine remanufacturers is that each and every engine overhaul is performed by adhering strictly to that specific engine manufacturer’s specifications. Accredited engine reconditioners will ensure that each engine part matches the manufacturer’s specs. Should it not be possible to machine engine parts to the next oversize or undersize, due to damage, they are thrown away and replaced.

Peace of Mind.

When using accredited engine remanufacturers associated with national motor industry regulatory bodies, like the Retail Motor Industry Organisation of South Africa, you can rest assured that you – and your engine – are in safe hands! This is because they are able to offer you a warranty on the engine remanufacturing work completed, something few back-yard engine repairers offer.


Arguably the biggest benefit to choosing accredited engine remanufacturers is that, should something go wrong, you’re able to follow up and ensure that the engine remanufacturer is held accountable for their service delivery. An engine is a very temperamental piece of machinery, and one small mistake in the reconditioning process could spell disaster. By choosing accredited service providers, you aren’t left in the dark should the worst happen.

Accredited Engine Remanufacturers in Durban

Eagleharm Engineering was founded in 1970 by Ivan Harmsworth, father to current owners Ryan and Todd Harmsworth. Eagleharm is accredited with the Retail Motor Industry Organisation, the RMI Engine Remanufacturers Association, and the Motor Industry Ombudsman of South Africa. For engine reconditioning done to manufacturer’s specifications, contact Eagleharm Engineering today!

how to tell when your engine needs attention - Illuminated Engine Light

How to Tell When Your Engine Needs Attention


An engine, regardless of size, is a complex mechanism of moving and fixed parts that work together to achieve a specific purpose. So, when one part starts to fail, the whole engine system begins to suffer – affecting overall performance. Without regular engine maintenance, poor performance is the least of all worries – the engine could seize up entirely! This article takes a look at some tell-tale signs your engine might not be as healthy as you thought. Here’s how to tell when your engine needs attention…


Power loss.

As with any internal combustion engine, the fuel provided is used to create power via a combustion cycle (4-stroke, 2-stroke). If you’re noticing a serious loss of power, this could mean that there’s an issue at one of the stages of the combustion cycle.


Strange noises.

Some might argue that engines make strange noises at the best of times but listen closely. If your engine is making knocking/ticking noises, backfiring from the exhaust pipe, hissing or spitting liquid – turn off your ignition and immediately call an engine reconditioning specialist!


Engine stalling.

Anyone who has done their drivers license test more than once probably knows exactly what a stalling engine sounds like. A stalling engine is most often caused by an issue with the initial ignition phase of the combustion cycle. Checked your spark plugs and they’re fine? Call a professional.


Strange smells.

Another sure sign of engine trouble is when strange smells start to come from your exhaust. This happens when the exhaust stroke of the combustion cycle is failing, and gives off noxious fumes that only get worse. This isn’t critical if left for a few days, but try and get a professional to take a look sooner rather than later.


Not starting.

Without a doubt, the biggest sign that your engine requires some serious attention is when you turn your key in the ignition and nothing happens. This could be your ignition, your battery, or a number of other engine issues. Not sure who to send it to? An engine repair centre can help!

Industrial Engine Reconditioning in Durban

Eagleharm Engineering has been diagnosing and repairing large engines in Durban for over 45 years! We understand engines, and take pride in our ability to skilfully recondition faulty engines. Connect with Eagleharm Engineering and make underperforming engines a thing of the past!


engine reconditioning process - Engine Parts Closeup

Eagleharm 101: Our Engine Reconditioning Process


Any industrial engine mechanic can take an engine apart and put it back together, but what about reconditioning an engine to an almost ‘good as new’ level? When it comes to industrial engines, down time equals money lost. Want to see how an industrial engine should be reconditioned? Here’s our Eagleharm Engineering engine reconditioning process…

Step 1: Engine Dismantle

The first step in our engine reconditioning process is one of the most important. This is where we carefully dismantle the industrial engine, looking at the condition of each and every engine part as it is removed. Once the engine has been stripped, each individual part is carefully stored for step two – the cleaning process.

Step 2: Cleaning Engine Parts

Once the industrial engine parts have been assessed for wear and damage, they are ready for the cleaning phase. Each part is placed in our Eagleharm Ultrasonic Cleaner which utilises Ultrasonic technology to remove oil, dirt and grime – leaving each part almost good as new. Once thoroughly cleaned, the industrial engine parts are assessed once more.

Step 3: Bearing Clearances

The next phase in the engine reconditioning process is to check bearing clearances. Here, our qualified artisans inspect the engine parts and compare them to the manufacturer’s factory specifications. Parts that are too damaged to salvage are discarded and replaced, and parts that can be saved are machined back to factory specification.

Step 4: Engine Reassembly

Once we’ve machined the salvageable parts to factory spec, and replaced the non-salvageable parts with new ones, it’s time to put the industrial engine back together again. Before this happens, each part is assessed once more to ensure they meet the manufacturer’s requirements.

Step 5: Testing the Engine

Probably the most important step in our engine reconditioning process, the final phase is to test the reconditioned engine. Here we listen carefully for any irregularities and run the engine to ensure it is functioning optimally. If nothing serious comes up, the industrial engine is ready for work once more!


Our Eagleharm Engineering engine reconditioning process is thorough, which means that if there’s an issue with your industrial engine – we’ll find it and fix it! We understand engines, and how to recondition them correctly, so find out more about our engine reconditioning services – or connect with us here to find out more!

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