Engine Reconditioning & Rebuilding

Operating Hours

Mon - Fri 07:00 - 16:30

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!

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!

Engine Re-Building | Person Working on Engine

Engine Re-building: Why It’s Necessary


In a brilliant article about engine re-building, it’s argued that an engine refurbishing and rebuilding is way more economical than replacing an entire industrial engine. With construction equipment costing a pretty sum per unit, industrial entities can save themselves great expenses further down the line by ensuring that engines are serviced at regular intervals. So, here’s why engine rebuilding is so important, how we at Eagleharm Engineering recondition and rebuild engines, and how to get in touch with an engine reconditioner in KwaZulu-Natal:

Why We Rebuild Engines

Apart from ensuring that all the vital parts of the engine are working efficiently, engine re-building is as much a preventative measure as it is a solution to existing engine issues. The worst types of engine malfunctions can be avoided through regular maintenance. More often than not a minor engine issue is exacerbated, and can cause further damage to other engine parts, when it’s not picked up in time.

By allowing a certified engine reconditioning specialist to have a look at your industrial vehicle engines on a regular basis, you’ll get forewarning of any pressing engine issues that might throw a spanner in your operations in the future. By checking key engine components, like the engine’s cooling system and oil distribution mechanisms, we prevent catastrophic engine failure down the line.

Whether for a day, a week or a month – if your industrial machinery isn’t running, you’re not making money! Here’s how we recondition and rebuild engines:

How We Rebuild Engines

Before fuel injection technology, engine reconditioning specialists would perform a ‘carb to pan’ engine disassembly. This involves removing the engine from the machinery and taking it apart down to it’s individual parts, nuts and bolts. Here are the steps in the engine re-building process:

  1. Engine parts are carefully removed, assessed for damage, and stored
  2. Once the entire engine has been stripped and assessed, an ultrasonic cleaner chemically cleans each part, removing any residual oil and dirt particles
  3. After chemically cleaning each part, they are assessed once more for damage and wear
  4. Bearing clearances are then checked and compared to the manufacturer’s factory specifications. Engine parts that aren’t in accordance with factory spec are machined to either the next oversize or undersize
  5. Once the engine’s damaged parts are repaired or replaced, and the rest of the components are thoroughly checked and cleaned, the last phase is to reassemble the engine and return it to the vehicle it belongs to.

Should your engine fail, follow this process to ensure that you get the most life out of your industrial engines and save yourself money in the long run. Don’t replace your engines, rebuild them!

Eagleharm Engineering specialises in industrial engine rebuilding and engine repairs in KwaZulu-Natal. We understand engines, and how to get the most out of them, so find out more about our engine reconditioning services – or connect with us here to speak to a human!