Technical Know-How | Jaeco

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Engine Check

Technical Know-How

Correct installation is the key to ensuring your repaired/rebuild/ new units doesn't give problems in the future.

First things first, why did the original unit unit fail? Did you know that over 90% of failures are caused due to outside influence? This can be oil contamination, oil starvation, foreign object damage, as well as fuel contamination , fuel delay or starvation. Before fitting a repaired/rebuild/ new unit, you MUST find the cause of the original failure and correct it before fitting the repaired/rebuild/ new unit.

Car Mechanic with Tablet

Industry Based Videos

Learn How Diesel Systems Works , New Technologies Launched , Troubleshoot Common Problems

Causes OF Failures

Know Why A Product Fails , Causes Of Failure For Distributor Pumps , Common Rail Systems , Turbochargers

Indsutry Based Videos

Common Rail 101: Non Common Rail Technologies

Common Rail 101: Non Common Rail Technologies

For more information about Delphi Technologies injectors, visit our website! https://www.delphiautoparts.com/gbr/en/category/fuel-injection-systems For how-to non common rail technologies help, visit the Delphi Technologies Resouce Center https://www.delphiautoparts.com/usa/en-US/resource-center/common-rail-101-non-common-rail-technologies This Delphi Training video covers the non-common rail technologies, including inline or rotary distributor pump, individual control pump, and unit injection. Watch the video to find out more. Like Delphi Technologies on Facebook! https://www.facebook.com/delphitech/ Follow Delphi Technologies on Instagram @delphitech_ Follow Delphi Technologies on Twitter @delphitech

Common Rail 101: How Solenoid Injectors Work

Common Rail 101: How Solenoid Injectors Work

For more information about Delphi Technologies injectors, visit our website! https://www.delphiautoparts.com/gbr/en/category/fuel-injection-systems For how-to on solenoid injectors, visit Delphi Technologies Resouce Center https://www.delphiautoparts.com/usa/en/resource-center/common-rail-101-how-solenoid-injectors-work This Delphi Training Series video walks you through how solenoid injectors work. Watch the video to find out the dos and don’ts. Like Delphi Technologies on Facebook! https://www.facebook.com/delphitech/ Follow Delphi Technologies on Instagram @delphitech_ Follow Delphi Technologies on Twitter @delphitech

Common Rail 101: Non Hydraulic Common Rail Systems

Function of the Common Rail injection system | MAN Truck & Bus

Function of the Common Rail injection system | MAN Truck & Bus

For engines equipped with common rail injection technology, the injection pressure is generated independently of the load and engine speed. Learn more in our video! » SUBSCRIBE: https://www.youtube.com/user/mantrucksandbuses?sub_confirmation=1 MAN Truck & Bus is one of Europe's leading commercial vehicle manufacturers and transport solution providers. The company's product portfolio includes vans, trucks, buses/coaches and diesel and gas engines along with services related to passenger and cargo transport. #MANTruckandBus More from MAN Truck & Bus: Website: https://www.man.eu/ Facebook: https://www.facebook.com/mantruckandbus Instagram: https://www.instagram.com/mantruckandbus/ Twitter: https://twitter.com/man_group LinkedIn: https://www.linkedin.com/company/man-commercial-vehicles/

Causes Of Failure

Causes Of Failure

Distributor Pumps

Distributor Pumps

Common Rail Systems

Turbochargers

Turbochargers

Distributor Pumps

Causes Of Failure

Physical Damage

Improper Torque , Improper Or Faulty Pump Gear

Housing Damage.png

Causes Of Failure

Shaft Damage.png

Adulterated Fuel

Bio Diesel , Poor, Abrasive Fuel (Particles) , Poor, Inadequate Filtration

Engine Oil In Fuel System , Incorrect Or Non-approved Additives

AF 1.png

Causes Of Failure

Adulterated Fuel , Water In Fuel

Water In fuel , Heavy Rusting , Poor, Abrasive Fuel (Particles) , Poor, Inadequate Filtration , Incorrect Or Non-approved Additives

Causes Of Failure

Low Lubricity

Poor, Inadequate Filtration , Low Inlet Pressure or Negative Pressure In Fuel Line

Causes Of Failure

Incorrect Timing Lock

Over Tightening Of Timing Bolt , Heat Generation , Leakage From Shaft

Shaft seizure.png

Distributor Pumps

Common Rail Systems

Causes Of Failure

Combustion Residue Out Side Of Injectors

Injector incorrectly installed (tightened or twisted on one side) , No sealing ring , Inadequate tightening torque when installed

Compression Leakage 1.png

Compression Leakage.png

Causes Of Failure

Thermal Overload Or Injection Bore Burnt

Diesel Tuning , Incorrect Or Non-approved Additives In Fuel , Engine Oil In Intake System , Oil Thinning , Biodiesel

Nozzle Damage

Bore Burnt

Causes Of Failure

Thermal Overload

Thermal Debris Damage

Nozzle Tip Melted Or Burnt

Diesel tuning , Incorrect or non-approved additives in fuel , Engine oil in intake system , Oil thinning , Biodiesel , Aluminum Deposits In Nozzle Shaft

Blue Tint.png

Nozzle Burnt

Causes Of Failure

Foreign Particle In Combustion Chamber

Mechanical Damage To The Nozzle

External Damage.jpg

Causes Of Failure

External Particle

Particles In Fuel Or Fuel Adulteration

Poor, Abrasive Fuel (Particles) , Poor, Inadequate Filtration

Fuel Adulteration 5.png

Fuel Adulteration 3.png

Fuel Adulteration 7.png

Fuel Adulteration 2.png

Fuel Adulteration 8.png

Fuel Adulteration 1.png

Causes Of Failure

Poor Or Adulterated Fuel Or Water In Fuel

Engine Oil In Fuel System , Incorrect Or Non-approved Additives In Fuel Or Water In Fuel , Inadequate Filtration, Poor Filter Quality Or Filter Service Life Exceeded

Fuel Adulteration 12.png

Fuel Adulteration 11.png

Fuel Adulteration 10.png

Causes Of Failure

Oil Deposits In Interior

Engine Oil In Fuel System , Leak In Engine Oil Lubricated CP , Leak On Fuel Return Side Of Cylinder Head (CRIN)

oil 3.png

oil 2.png

Oil 1.png

Causes Of Failure

Electrical Failure

Short Circuit Sensors , Engine Oil In Fuel System , Incorrect Or Non-approved Additives In Fuel Or Water In Fuel

Short Circuit.jpg

Common Rail Systems

Turbo Chargers

Causes Of Failure

Foreign Objects

Turbo Wheel Damage, Caused By Small Objects Entering The Turbine Or Compressor Housing At High Speed, Leading To Imbalance.

Damage To A Compressor Wheel

Damage To Nozzle Ring Assembly

Damage To A Compressor Wheel

Causes Of Failure

Lack Of Lubrication

Turbo Fatigue Cracking And Material Transfer Created By Metal Friction And High Temperatures As A Result Of Oil Inlet Supply Restrictions, Incorrect Gasket Placement And Use Of Liquid Gaskets Or Poor Quality Lubricants Or Immediate Acceleration On Idle On Ignition.

Incorrect Shape And Position Of Gasket

High Temperature And Material Transfer From Bearing

Causes Of Failure

Oil Contamination

Turbo Bearing System Damage Caused By A High Concentration Of Carbon Suspended In Oil, Created By Extended Oil Change Intervals Or Poor Maintenance. Bearing Damage Caused By A Steel Shot Suspended In Oil Following A Major Engine Overhaul.

Worn And Scored Bearing. Material Transfer To The Shaft

Large Particles In Oil Can Cause Deep Scoring And Impacts

Worn And Scored Bearing. Material Transfer To The Shaft

Causes Of Failure

Overspeed & Excessive Temperature

Turbo Bearing System Damage Caused By A High Concentration Of Carbon Suspended In Oil, Created By Extended Oil Change Intervals Or Poor Maintenance. Bearing Damage Caused By A Steel Shot Suspended In Oil Following A Major Engine Overhaul.

Orange Peel Effect On Back Face Of Compressor Wheel Is A Clear Sign Of Over Speeding

Causes Of Failure

Large Particles Can Cause Deep Scoring And Impacts

Engine Back Compression

Oil From Exhaust Causes Shaft To Imbalance Thus Causing Play At High Speeds Leading To Damaging Of The Turbo Chargers

Turbochargers

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