However, the technology onboard is historic. But has the L5P lived up to all the hype? For the most part, yes. With that said, thanks to aftermarket wizardry, we now know that rwhp is attainable on the stock injectors, injection pump and turbocharger.

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In March ofDuramax production reached the two million milestone in the form of the L5P engine shown above. A new, gray iron casting combined with heat-treating is said to have improved block strength by percent, and according to GM, the new block is capable of coping with cylinder pressure in excess of 2, psi or bar.

Big cross sections lead to shorter port distance from the intake valves and drastically revised intake ports bring not only more air, but equal airflow into each cylinder. A stronger aluminum casting permits the combustion area of the heads to withstand the higher cylinder pressures the L5P sees and beehive valve springs with ultra-light, LS-style solid rollers also making it into the valvetrain mean this engine will have no problem handling high rpm.

An added benefit of the new cap design is the added clearance it provides between the crankshaft. Given the failures that plagued the LBZ and LMM and with the LML utilizing pistons fairly similar to those two enginesthis is a step in the right direction as far as piston longevity is concerned.

The pistons themselves are taller, thicker walled for added strength and as a result are heavier than previous versions. The percent horsepower improvement the L5P enjoys over its LML predecessor would only have been possible with a higher-flowing turbocharger—and the L5P has one. Instead, an electrically controlled and actuated BorgWarner unit handles boost production up to 28 psi in stock formprovides quicker variable vane response and doubles as a turbo brake to help bring heavy loads to a halt.

The pump is still located at the front of the lifter valley, but the HP4 uses three high-pressure cylinders vs. On top of all of these standard benefits, the HP4 pump is capable of operating at 36, psi without issue. The aftermarket is going to have a lot of fun with this pump.

The L5P engine reverts back to solenoid-style injectors instead of sticking with the piezoelectric units we saw in the LML. The difference here is that these solenoid style injectors are highly advanced, G4S Gen III units from Denso and are said to flow approximately percent more fuel than the LML injectors. The injectors are equipped with seven-hole mini-sac nozzles, which aid fuel atomization to reduce emissions. Each injector can carry out as many as seven injection events per combustion cycle, which means multiple pilot events to quiet the engine and more than one post event to further aid in emissions reduction.

It took the aftermarket more than two years to figure out how to infiltrate it. Specifically included with the L5P Duramax, the hood scoop is used to drive cool, dry air into the engine and provide controlled intake air temperature for the engine under all operating conditions. With the front-ends of the HD pickups and all diesel trucks for that matter perpetually growing in order to accommodate more and more heat exchangers stacked in front of the engine, something had to be done to introduce more fresh air into the equation, right?

The one downside to the system that we can see is that the expansion chamber, designed to trap larger debris and air born particles, will require periodic servicing or cleaning. Denso Injectors The L5P engine reverts back to solenoid-style injectors instead of sticking with the piezoelectric units we saw in the LML. Want to get the most out of your diesel engine? Take a look at our budget diesel mods! Recommended For You. Duramax History, Lesson 1: LB7.

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Order : OK. Ready to Ship. Genuine transfer pump cover for Denso HP4. Contact Supplier. HP4 Fuel injection pump Original HP4 Fuel Pump Repair kits for HP4 pump Common rail Denso Hp4 fuel pump injection pump. HP4 pump repair kit W elcome you to visit our factory and cooperate in the futur e. Production process using advanced computer control and digital display systems, production technology, strong technical force.

High quality, high technical performance, with micro-controller and digital functions. Products are sold more than countries and regions of all world. We can supply both original and aftermarket auto parts. What is your terms of packing A: For original, the package is original box, For after market parts.

Sometime send for train to the Middle Asia market and Russia market. S sensor tester common rail injector tools. The popular high pressure CRP common rail hpo pump tester simulator. About product and suppliers: denso hp4 products are offered for sale by suppliers on Alibaba. A wide variety of denso hp4 options are available to you, There are 94 suppliers who sells denso hp4 on Alibaba. Related Search: 4a common rail diesel fuel injector calibration test bench bosch cp1 cp2 cp3 bosch eps common rail test bench common rail diesel injection test benches hand pump for denso common rail pump injector test bench bosch denso fuel pump china rail test china manufacturers common china cr test electronics common rail pump denso hp0 tester common rail pump test tool injection tester common rail china common rail tester china common rail tester supplier personal protective equipment market output by.Enter the Product Name of the product you are interested in and we will provide more information.

DENSO Diesel technology provides an effective solution for every generation of diesel engine — offering efficiency, performance, reliability and minimal emissions. This is demonstrated by DENSO Common Rail Systems which deliver the highest injection pressure in the world; resulting in low fuel consumption, low emissions and impressive performance without any compromise on quality.

Originally designed for trucks and heavy good vehicles, diesel common rail systems consist of elements of high pressure pumps, ECUs and sensors to deliver maximum engine performance and reliability with a minimum level of noise and emissions.

The common rail type pump has been developed to meet strict exhaust gas regulations in the 21st century. This system consists of a supply pump, common rail, electronically controlled injectors, various sensors to detect the running condition of the engine and a computer ECU to control these devices. The supply pump is driven by the engine and produces high-pressure fuel.

An injector is mounted on each cylinder of the engine and the high-pressure fuel from the supply pump is distributed to each injector by the common rail.

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Find your automotive parts E-Catalogue. Find product information Products. Back to Diesel Components DENSO Diesel technology provides an effective solution for every generation of diesel engine — offering efficiency, performance, reliability and minimal emissions. Common rail fuel injection pump supply pump The common rail type pump has been developed to meet strict exhaust gas regulations in the 21st century.

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Duramax History, Lesson 6: L5P

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VDO COMMON RAIL

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Denso HP3 / HP4 Pump

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Changes will take effect once you reload the page. SKU: HP Additional information Weight oz Free Shipping. Reviews There are no reviews yet. Related products. Add to cart Show Details. Select options Show Details. About Us. Follow us on Facebook.The Duramax suffers from a high pressure fuel pump issue unique to this year range.

Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Below we will discuss the reasons for this failure, how to diagnose a pump failure, and show you the parts you need to properly fix your vehicle. The short answer: lack of lubricity. Lubricity is most commonly defined as the ability of a fluid to minimize the degree of friction between surfaces in relative motion under load conditions. The CP4 injection pump creates higher pressures with less volume than its predecessor, the CP3 pump.

Although this makes it a more efficient pump, the lack of volume creates a lack of lubrication since these pumps rely on the diesel fuel to act as a lubricant. Some fuel resellers mix lubricity-increasing additives into their fuel prior to sale, but this is not consistent and not well-regulated. Using a commercially available diesel fuel additive can be helpful, but cannot be guaranteed to prevent CP4 pump failure. The LML and LGH CP4 pumps most commonly fail due to this lack of lubrication which causes internal metal parts the drive cam, cam follower or pump piston, as well as the housing itself to rub against each other and begin to shave off small metal particles.

These particles are immediately distributed throughout the fuel system causing catastrophic failure. Some pumps actually seize up completely and burst the aluminum housing open as a result of this failure. Remove the CP4 pump and then the fuel pressure regulator for inspection. If the body casing of the pump is cracked, as in the picture, or you find metallic debris on the fuel pressure regulator screen pictured right this is indicative of a pump failure.

Simply flushing the fuel system is inadequate, and could lead to residual contaminants in your fuel system. Contamination is the number one cause of repeat injector failure, and replacing all of the fuel system components is the only way to prevent recurring contamination issues. We offer this kit in a few different convenient configurations to meet your needs, by default it includes:. Trying to negotiate warranty with General Motors.

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Thank you for your assistance. Good morning — We will send over a copy of the tech bulletin text right away. Thanks for stopping by!

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Hey Brother, just bought a Chevy Silverado Only has miles on it. Would you please send me the tech bulletin? Do you think a formal recall will come about? We have sent the bulletin your way.

Unfortunately, we have not heard of any formal recall coming into effect.

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Read article in TrailerLife. Had no idea this was a problem. Have 82,00km on truck. Do you think GMC would cover this as a preventative measure, keeping good will of customer?

Would you please send me the Technical Bulletin.