Engine Reconditioning & Rebuilding

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How to choose the right engine reconditioning workshop


There’s no doubt that an engine reconditioning workshop is going to charge less to repair an engine than you’d have to pay to replace it. However, this isn’t always the case. Inexperienced engine reconditioners, who don’t have the correct precision machining equipment for the job, could end up costing you just as much as a new engine in damage control. It’s pretty important to choose the right engine repair workshop, but you don’t find them on every street corner, which makes this challenging. So, if you’ve searched the internet for “engine reconditioning workshop near me” and you’re deciding between a few options, here’s what to look for in an engine rebuilding service provider:

Years of experience

Engines have changed quite a bit since the first internal combustion engine fitted into the first-ever automobiles. In the last 50 years since Eagleharm Engineering has been open, we’ve seen petrol and diesel engines evolve. By choosing an engine reconditioning workshop that has been around for a while, you’re partnering with automotive machinists and engine rebuilders who know engines better than most others – and who know just how to get the best performance out of the engines they work on.

Service capabilities

The last thing you want, when looking for an engine repairer for your earth-moving equipment, is to arrive at a workshop that only has the machinery to recondition passenger vehicle engines. Machinery of this nature, like engine block boring equipment, comes in different sizes for different engine refurbishing projects. The ideal engine reconditioning workshop to partner with would be one that has the ability to service any engine you bring to them – regardless of size or condition.

Client testimonials

Choosing an engine repairer is tough. How do you know if the workshop is going to do a good engine reconditioning job before they’ve even grabbed a spanner? There’s only one way, and that’s to look at and read the company’s testimonials. What experiences have past clients had with the workshop? Are there people who swear by the company? Before making your choice of workshop, chat to some people who’ve had positive experiences.

Sector knowledge

Engine reconditioning workshops might claim to be the experts in their field, but how can you verify this? One thing to look for is a depository of industry information, often in the form of a “blog” page on the company’s website. Are they sharing informative articles about their trade? The more information a workshop shares about their industry, the more they likely know about it, which should render them a serious contender for your next engine reconditioning project.

Expert engine reconditioning workshop in Durban

Eagleharm Engineering has been operating in Durban for over 50 years, servicing and rebuilding petrol and diesel engines of all shapes and sizes. We’re the only engine reconditioning workshop in Durban that has machinery big enough to machine some of the largest engine blocks. We’ve collected countless positive testimonials from clients since first opening our workshop doors, and we share much of our sector knowledge on our engine reconditioning blog. Get in touch with our owners, Ryan or Todd Harmsworth, to arrange expert engine reconditioning in Durban!

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!