When researching an engine rebuild it can be confusing wading through industry lingo and technical jargon. This article should help clear up the differences between short blocks, long blocks, complete engines crate engines and what option is best for your situation.
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Short Blocks are a non-running engine. They consist of an engine block, crankshaft and connecting rods. A short block however does not consist of a cylinder head, liners, gaskets, rings a timed gear-train or any kind of ancillary parts including the fuel system.
Advantages: Short blocks are great for customers who have a non-cracked cylinder head but an un-useable crankshaft. Usually when a crankshaft spins a bearing the entire engine seizes up also ruining the head. Customers with a workable head can save a great deal of time and money just opting for a new block/crankshaft combo.
Disadvantages:Usually short-blocks requests are rare because the customer’s cylinder head is also un-useable. When remanufacturing an engine it might be best just to have the cylinder head work done as well. A new ported head machined back to OEM spec can be a great way to add life to an existing engine. Another disadvantage of a short-block could also be the labor costs. A mechanic will ultimately have to reassemble the engine regardless if it is a short block or a long block which includes re-configuring the old cylinder head. The labor costs to reassemble the engine will be more than a long block or complete engine without the added advantage of a new cylinder head.
A long block is a more complete version of a short block. A long block is still a non-running engine but contains more parts than a short block. The biggest difference between a short block and a long block is the inclusion of the cylinder head. A long block will typically include:
• Cylinder Block
• Complete Loaded Cylinder Head
• Crankshaft
• Camshaft
• Followers/Lifters
• Pistons
• Liners
• Rings
• Connecting Rods
• Intermediate Cover
• Timed Front Gear Group
Caterpillar Reman Longblock Engine
Depending on the rebuilder, some long-block engines will include injectors often called a 7/8 engine. It is always advised to get a build sheet before purchasing just so you are completely aware of what you are getting.
Advantages: Long-block engines are perfect for customers looking save some money but wanting the most complete internal gear-train. A remanufactured long-block engine can be as much as 50%-70% cheaper than a complete drop in option from a dealer. Other advantages of a long-block engine include less complications during installation. A longblock is built to the exact engine serial number of the engine being replaced. The flywheel and flywheel housing are already an exact match so that bolting up the engine to transmission will work every time. Longblocks are also built to accommodate the exact fuel system. Some blocks are built for inline fuel systems while others are built for rotary style fuel pumps. With a long-block all someone would have to swap over from the old engine is the water pump, oil pump, turbo, fuel system and ancillary parts such as accessory mounts. It is cheaper on the parts and labor side than a complete engine.
• Upfront Pricing
• Save money re-using good working ancillary components
• Built exactly to engine serial number
• Swap over perfect fitting ancillary components
• Perfect fit every time
• Shorter Lead Time
• More simplistic warranty terms
Disadvantages:The disadvantages to long-blocks engines are few and far between. For those looking to get back to work or on the road as quickly as possible, a long-block will require more labor than a drop-in complete engine. Long-blocks engines warranties also only cover the hard-internal parts of the engine and do not include failures to the ancillary parts which means if your injectors fail they are not covered by the builder.
When buying used diesel engine parts, I believe it is important to consider the condition of the parts, the compatibility of the parts with the engine, and the cost.
Firstly, it is essential to inspect the parts to ensure they are in good condition and will function properly.
Secondly, it is important to ensure that the parts are compatible with the engine and will fit correctly.
Lastly, you should compare prices between different vendors to ensure you are getting the best deal. In addition, it is a good idea to research the vendor to ensure they are reputable and trustworthy. You should also compare the prices of used parts with the cost of new parts to ensure you are getting the best value for your money.
Finally, it is important to read customer reviews and ask for recommendations to ensure you are buying from a reliable source.
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Overall, when buying used diesel engine parts, it is important to consider the condition of the parts, the compatibility of the parts with the engine, the cost, the reputation of the vendor, and customer reviews. Doing so will help ensure you get the best value for your money and the parts will function correctly.
When buying used diesel engine parts, don't just judge a part by its age. The mileage and usage history of the vehicle it came from can tell you a lot about its condition and performance.
Mileage matters because parts with less mileage tend to be in better shape. But not all parts age at the same pace - moving components like bearings and pistons have a harder life than the more stationary parts like engine blocks. Usage history is another piece of the puzzle.
A well-maintained vehicle that cruised through easy-going conditions is likely to be in better shape than one that survived the daily grind of harsh environments or neglect. So, when scouting for used diesel engine parts, remember that age is just a number - mileage and usage history are the real storytellers.
Firstly, you need to consider the quality of the part that you are purchasing. It is important to thoroughly inspect the part for any signs of wear and tear or damage, in order to ensure that it is still in good working condition.
Secondly, you need to consider the reputation of the seller from whom you are purchasing the used diesel engine parts. It is important to only purchase from a reputable seller who has a proven track record of supplying high-quality parts. Additionally, you should also check to see if the part comes with any type of warranty or guarantee, as this can give you added peace of mind.
Finally, you need to consider the cost of the used diesel engine part in relation to the cost of a new one. While used parts may be less expensive, it is important to factor in the potential cost of any repairs or replacements that may be needed in the future.
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