1nz Fe Engine Overhaul

[Jarrell Campbell]

Whenit comes to replacing parts or touching up your engine, there are several terms you'll hear a lot. Words like overhaul, rebuild, remanufacture, and refurbish may come up after a few years when parts of your engine require maintenance or replacement. Knowing the differences between an engine overhaul and rebuild will make your next big project more manageable and help you decide where to direct your focus.

An engine rebuild is typically what it sounds like, rebuilding the engine. Typically, engine rebuilds require using new parts and focusing on bringing your engine to an almost pristine condition. Many of the parts you replace in an engine rebuild are also part of a complete overhaul. A notable difference between a rebuilt and remanufactured engine is that the latter must use new parts from the original equipment manufacturer, so it's a rebuild without relying on aftermarket parts.

Engine overhauls are typically associated more with maintenance than rebuilding an engine. There are two different types of overhauls, in-frame and out-of-frame. In-frame overhaul kits allow you to swap out parts and vital components without removing the engine from the block, while complete overhaul (out-of-frame) kits require taking out the engine. Both kits contain essential diesel engine parts like pistons, rings, gasket sets, bearings, and washers. Most out-of-frame kits include front and rear seals as well.

When looking at the differences between an engine overhaul and a rebuild, you may wonder which one you need. Both rebuilds and out-of-frame overhauls are lengthy and expensive processes that require taking the engine out of the block. An engine rebuild is often the better option when you're planning to replace everything to get your current engine to as clean of a slate as possible. Overhauls are good when you need to update specific parts or pieces to keep things running smoothly. The better choice may come down to the current state of your engine, but it's a good idea to have an in-frame overhaul kit around in case you need to make some modifications.

To learn more about diesel auto parts and engine overhaul kits, ATL Diesel has everything you need. We have parts for heavy-duty engines, overhaul kits for various engine types, and many helpful blogs covering everything you need to know about keeping your machines in good condition. For more details, don't hesitate to contact a member of our team who will be happy to assist you with any concerns.

My IO-550N had cylinder work at 2200 hours at PowerMasters for about $13,000. Original cylinders were rehoned, same pistons with oversize rings and a valve job. (Those cylinders went another 1300 before a main bearing failed causing the overhaul.)

2150 at overhaul. No top. Cyl 5 IRANed 1 year prior to overhaul. Oil consumption was on the order of 1 qt per 1-3 hours - Oil consumption seemed to be more related to takeoffs and climb time than flight time. Religiously LOP. Shop reported engine looked very clean and crank looked new.

Something else to think about as well is downtime depending on how you use the plane. Rick how long was your plane down for the overhaul? As counter a factory reman is more expensive but the downtime was a week and the factory service center flew or had the engine on the stand for the first 7 hours. Essentially when I picked up the plane it was already back to normal oil consumption. Not one issue in 350 hours since reman. My factory reman was net $37,186 plus accessories, prop overhaul and install a couple of years ago.

Something else to think about as well is downtime depending on how you use the plane. Rick how long was your plane down for the overhaul? As counter a factory reman is more expensive but the downtime was a week.

Bill was the most expensive at $46,500 for a complete overhaul but he included accessories other shops charged extra for. I added a prop governor overhaul and paid for needed baffling upgrades and a few other items.

I dropped the plane off with 2,980 hours on the hobbs. No top, no overhaul, just one cylinder that needed replacement three years ago from excessive valve guide wear. I flew ROP for the first 200-300 hours before going to LOP and typically run around 2500 rpm.

Not a typo. As Clyde states, my early interactions with the Cirrus factory service center in 2001-2002 era affirmed that the engine would take it easily. I recall someone claiming that the IO-550N was rated for 2800 RPM and the Cirrus install could operate at 2700 RPM easily.

So we looked into the overhaul. A factory-new engine costs about $28,000, and there is simply no way it would raise the value of the airplane by that amount. A field overhaul is viewed differently by different buyers and depends so much on the records you keep, the amount of outside machine shop work done, the overhauled accessories and, frankly, who does the work.

Another hidden factor into this overhaul qoute, ls hanger rental. Some airplanes are still parked outside on the ramp. Dont get me started on working from out of the trunk of car, with the minimums of your Harbor freight tools. Just saying, l remember

Those low budjet times.

I had a low oil pressure indication in my Mooney Encore the other day and made a precautionary landing in Myrtle Beach, SC. There was debris in the oil pressure regulator causing it to fail and the shop there looked at the oil filter and found non-ferrous metal, indicating it's time for an overhaul. I had been seeing the oil blacken quickly so I knew this was coming. The engine is at about 1330 hours.

Shop there quoted me $35,000 for an overhaul including magnetos, harness, spark plugs, turbocharger and new cylinders. They plan to reuse the starter, exhaust system and wastegate controller (was just overhauled a couple months ago).

I've replaced a couple cylinders already and am pretty overwhelmed and beat up from spending money on this engine (welcome to airplane ownership, I know). Can anyone offer advice or a place to ship the engine for a better deal?

The shop there says the next step is to take the engine apart to see what's really going on. Long story short, I'm not super familiar with the overhaul process and want to feel comfortable that I'm not getting a bad deal or doing work I don't need to do.

Wouldn't finding the source of the metal be a first step before thinking of an overhaul? Pistons are aluminum and wrist pin plugs are aluminum, both are known to shed pieces. An internal cylinder inspection would be a starting point, quickly blackening oil is a sign of cylinder issues.

Well their web site gives a quote for a complete replaced engine. It'll undoubtedly be less expensive when I speak to them as a few things on the engine are recently overhauled or in working condition.

Call and talk to David or Sam. All sam does is engine rebuilds. I had him do my plane. It looks like your overhaul starts at $18k and change. There in rural MO and labor is less. I got a referral from a guy that my banker knew out of Milwaukee area that has done 2 sets of overhauls on a turbo 337 Cessna twin who was very pleased. I was in same boat as you and ended up driving my engine down there. I was set on new cylinders and he called me to tell me the barrels still were at the bottom end of new limits, not services limits but new. He said it's your money and you can waste it if you like but with a little honing and new exhaust valves and valve guides he wouldn't have to charge extra. I was sold as he actually talked me out of new cylinders because I kept the chts below 380 in flight and thought there was at least one more overhaul cycle in them.

Anyway if you want to talk pm me and I'll give you my cell and can fill you in on the rest. Neilpilot on here also has had a couple motors done by him.

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Which shop is doing the overhaul? The maintenance shop? I wouldn't do that. Al those engines overhauled in regular mechanic shops are nothing but trouble and after 500-800 hours, the cheaped-out reground lifters or cylinders go bad, requiring another overhaul.

Triad Aviation in Burlington NC is an engine (and prop shop) with a good reputation in this area. They will not be the cheapest but I would highly recommend you talk to Othman Rashed, "President & Engine Consultant".

All I can say is think twice about having them tear it down to get a closer look to figure out what the problem is. The reason is that once they have it in a million pieces on the bench, it will be very difficult for you to look around for another shop. Although I am quite happy with my recent overhaul, the shop quoted $1,500 to tear it down and another $2,000 to put it back together to the point where it could be used for a core trade-in. That money would have to be factored into the cost of a factory rebuilt or an overhaul by another shop. So the long and short of it is, if they tear it down you are pretty much committed to them for the overhaul IF you want to keep expenses to a minimum.

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