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Here we discuss some of the problems you might run into with your ISX. The engine is a workhorse but not without its issues. The Cummins N14 was a fantastic engine and beloved by diesel fans for many years.
Like any other engine with an EGR, the system can cause some problems. This is a difficult problem to diagnose , but monitoring the coolant consumption can help. If you notice that it's using a larger amount of coolant than normal, it's probably worth investigating further.
Similarly, there might be a white residue left behind from the burnt coolant. This is another telltale sign of a leak. This kind of problem is more common on older style EGR systems, as many newer ones have tried to address and fix the issue.
The ISX also has a history of camshaft issues. In short, an ISX camshaft can flatten out. This is not because of an issue with the camshaft itself, but with the rocker arms.
According to Cummins, there was a production of rocker arms that prevented proper oil flow, starving the components. These bad rocker arms stick and smack the camshaft, causing the lobes to flatten. You can fix this failure by replacing both the affected camshaft and the rockers. If you don't correctly diagnose the problem and leave the faulty rockers, then the same thing will happen to your new camshaft.
Apart from performance issues caused by a worn camshaft cluing you in to a camshaft problem, there aren't any particular symptoms to watch for that indicate whether or not you have these rockers. This issue is usually found after a camshaft repair or overhaul, when the timing might be affected. When the engine was assembled, it was timed according to a certain procedure using timing wedges.
This turned out to be kind of a crude way to time an engine, and Cummins found that through either sloppy procedures or worn tooling, the wedges had a tendency to wear. This changed the timing of the camshaft.
The system itself is very particular, and the change in timing can upset the balance in the engine. Particulate filter: An ISX engine has a fully integrated particulate filter for uncompromised performance by reducing particulate matter.
Single overhead camshaft: Versions of the ISX engine made after have a single camshaft system with a common rail fuel operation that relies on piston pumps to inject diesel.
Variable geometry turbocharger: The turbocharger has a sliding nozzle to boost durability and reliability. Its electric actuation enhances its responses and control for adjustment.
The component also delivers a definite increase at any RPM. Cummins has mastered the engineering process by integrating each possible solution into one unit. Address any problems immediately to avoid more severe damage. Here are some tips to keep in mind before making engine repairs to your ISX engine :. Do you have a single or dual cam ISX15? Does it have an EGR system? When it comes to common ISX engine issues, some problems may not affect your engine depending on the year it was made.
Clogged inlets came about in when recirculation was occurring, also affecting HP. The turbocharger is one of the most notorious ISX15 failures and can be expensive to fix. While they are ideal for direct throttle response, VGTs often experience a buildup of carbon, soot, rust and other contaminants. You may feel no response from the engine or an extreme retort at low RPMs. The best fix is to clean the exhaust side of the VGT, replace its parts or swap it for a fixed unit.
Another sign is if you notice white residue from the burnt coolant. The rocker arms within your ISX engine may be damaging the camshafts, which causes an improper amount of oil to pass. When the rockers hit the camshaft lobes, it flattens them. This deprivation causes your marine or generator application to experience performance issues.
You can replace both the camshaft and rockers to deter the problem. Swapping rocker arms for new ones is vital. Otherwise, they will flatten the new camshaft as well. Problems with a timing wedge often happen after you repair or overhaul the camshaft. Over time, a buildup of contamination can form in the oil filter, resulting in a drop in oil pressure.
Avoid the timing wedge issue easily by simply changing the oil filter. If the problem seems to improve, you will then need to retime the ISX engine using a dial indicator. Certain ISX engines experience more problems than others, but each issue has a set of simple troubleshooting procedures. Cylinder head with valves: When a cylinder head is remanufactured to advanced conditions, it will function like new.
The new internal components are tested for air decay and are also wet tested. It has chased threads, and mechanics weld any cracks to avoid leaks.
Inframe engine rebuild kit: The rebuild kit includes new parts. The pistons are made from heat-treated steel and have a modern closed-skirt design. With induction-hardened cylinder liners, it delivers improved wear resistance.
The rod bearings are made from bi-metal for better strength, durability and fitment. Fuel injector: A remanufactured ISX fuel injector has new parts ranging from the spill valve, shim and NOP spring to screws and the actuator assembly.
Cummins injectors also include new external O-rings and filters. Inframe engine rebuild kit with re-ring and fewer pistons: The ISX15 has an inframe rebuild option for when your pistons are in good shape. It has oil control rings made with precise tangential tension for ideal control, and the gaskets are made with premium materials.
Valve camshaft: If your ISX engine has worn camshafts, they can reduce horsepower and affect the valve timing. The valve camshaft involves precise remanufacturing. ISX15 variable speed propulsion engines are perfect for recreational, commercial and government marine applications. Cummins strives to upgrade and improve each component in their ISX engine series to deliver superior dependability and performance.
The marine engine has an exceptional fuel economy compared to other big-bore engines and outstanding braking features. The ISX engine also has unmatched fuel economy, emissions, performance and cooling systems:.
Fuel economy: The ISX15 has efficient water and fuel pumps which deliver more usable horsepower to your operations. Cummins ISX fuel and water pumps use technology to generate optimized combustions and fewer regenerations of the aftertreatment system. The ISX15 undergoes better fuel economy advancements with each new version. Performance: The ISX15 has a massive range of horsepower, depending on which version suits your application.
With a max 2, lb. Cooling system: The cooling system underwent a size reduction without losing power to increase aerodynamics. A smaller cooling solution creates an open room, forming cooled air around the engine. Cummins also continues to improve the combustion chamber to result in fewer active regenerations of the aftertreatment.
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|Cummins isx motor||Paccar Truck Repair and Maintenance. Cummins also produced a hp and lb-ft version for the RV market. Integrated electronic controls: Engines produced after rely on an ECM. Besides being a superior truck engine because of its torque and horse, the engine is also durable. Like any other engine with an EGR, the system can cause some problems. Our specialists deliver cartoon baxter stockman solutions for your specific applications and needs by working with you one-on-one.|
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WebThe Cummins X-series engine is an Inline -6 diesel engine produced by Cummins for heavy duty trucks and motorcoaches, replacing the N14 in when emissions . WebJan 6, †∑ Cummins ISX used diesel engine for sale. HP, CPL tested and inspected with warranty. Call or visit our website for more info. Cummins . WebJan 3, †∑ Cummins ISX Engine History. First debuting in , the Cummins ISX engine replaced the N14 series, which had been around for many years and was an .