Showing posts with label Diesel. Show all posts
Showing posts with label Diesel. Show all posts

Monday, January 2, 2012

Damaging Effect of Soot on Diesel Engines!

!: Damaging Effect of Soot on Diesel Engines!

There has been a continuing problem with diesel engine trucks emitting soot from their exhaust pipes and causing environmental pollution. In recent years, there has been significant effort and advancement by truck manufacturers and oil companies who are doing research to produce oil that will meet the ever-increasing standards to help reduce, or even eliminate, airborne contaminants in the environment.

What is Soot?

Generally speaking, soot is comprised of the impure particles of carbon that result from the incomplete combustion of a hydrocarbon. Formation of this contaminant depends largely on the composition of the fuel; therefore, manufacturers recommend the use of improved oil to help prolong the life span of the engine and to decrease oil change intervals.

It is very important to monitor and analyze oil contaminants to prevent premature oil degradation and failure of a truck's diesel motor. Although soot contamination is not considered a symptomatic contaminant, it can be a root cause of new motor failure occurrences. In other words, it is very capable of causing premature engine failures - or worse.

Presence in Engine

The presence of this contaminant in an engine is normal. It is expected, however, that the manufacturer's recommendations about mileage and service hours of the oil would be consulted. This would help in understanding that soot comes from the exhaust and when highly concentrated, it would be completely abnormal. This type of contamination may cause the following issues with a truck's engine:

The generation rate directly affects combustion efficiency. A high soot load can be caused from excessive ring clearance, restricted air filters and poor ignition timing. An oil change may not necessarily be the solution for this combustion problem. Deposits on the surfaces of motors that interfere with the efficiency of combustion as well as the economy of oil consumption. Rapid wear of rings and cylinder walls, which can be caused by buildup in the grooves behind piston rings. During cold start conditions, carbon jacking can severely damage the rings. If soot and sludge separates and is deposited on areas such as the valve covers, oil pans, and rocker boxes, this may risk the reliability of the motor. High viscosity and other corresponding problems during a cold start as well as the risk of oil starvation can be due to a high concentration level. Newly manufactured diesel engines are designed for lower emissions. This means that the injection pressure is higher which increases the sensitivity of abrasive wear caused by soot. Also, the amount of disturbing production is amplified with some of the new exhaust gas recirculation (EGR) systems.

This contamination can cause engine failure to develop over varying amounts of time. Usually, fuel/oil with moderate levels of contamination can cause sudden-death motor failure with its combination effect. While massive concentrations can cause sudden-death failures - and more problems - in this type of case, it can actually shorten the life span of the engine by almost 60%. This means that your motor's lifespan could be decreased from 750,000 miles to 300,000 miles of lifespan with controlled soot contamination.

The positive and negative side effects of a better filtering system in an engine have been an ongoing discussion among many manufacturers and oil companies. Oil filtering systems can help remove impurities from the lubricants even while allowing soot to mix with the oil which does not help in protecting the engine. Therefore, it is very important to monitor and analyze soot emission from a truck's engine in order to maintain a longer lifespan for that vehicle. Don't let soot damage your diesel engine!


Damaging Effect of Soot on Diesel Engines!

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Wednesday, December 28, 2011

Used F250 6.0 Turbo Diesel Engine

!: Used F250 6.0 Turbo Diesel Engine

Everyone is aware that the Ford Motor Company has been one of the most respected automotive companies of the world for the last 50 years. Among other things, the company is engaged in manufacturing full size pickup trucks also. Among the F series pickup trucks, the aim of launching F 250 is to bring out a truck with great features, design, power and specifications. F 250 are the Super Duty Pickups launched by Ford.

F 250 trucks are quite popular for their creditable torque capacities, towing rating and also for their payloads. The performance levels of the engines of F 250 trucks are much more than those of F 150 trucks. In general, all pickup truck drivers may wish to have enhanced boost for pay loads and this desire is completely fulfilled in these trucks with a great engine power.

The Ford F-250 6.0L engine has a long life as is the case with all diesel engines. This is a Power stroke engine with an overhead valve design. Each cylinder has four valves. This is an iron block motor with an electro-hydraulic "generation 2" fuel injection, otherwise called the Split Shot Hydraulic Electronic Unit Injectors system (HEUI). The compression ratio of this engine is 18.0:1. The horsepower produced by this V 8 engine is 325 at 3,300 rpm and the torque is 570 lb.ft. at 2,000 rpm. The measurements of bore and stroke are 3.74 inches by 4.13 inches. There are two options in transmission, with both six-speed and five-speed automatic transmissions available. Options of both four-wheel drive as well as a two-wheel drive are available. The maximum payload and the gross vehicle weight rating of this 6.0 liter are 2,700 lbs. and 9,600 lbs. respectively. The steering used is power recirculating ball steering with an overall ratio of 20.16:1. The engine uses a variable geometry turbocharger and intercooler. The turbo configuration is Single Variable Vane Geometry, otherwise called as the VGT Configuration.

The 6.0 Power Stroke engine was first used in the year 2003 and it was a replacement to the previous the 7.3 liter engine. At the time of launching, it produced a horsepower of 325 and a torque of 560 lb.ft. In the year 2005, the company modified the 6.0 L 32-valve pushrod-actuated Power Stroke single-turbo diesel engine and the torque was boosted to 570 lb.ft. But, there was no change in the power of the engine.

This engine was used on super duty trucks till model year 2008 which ended in 2009. The previous 6.0 liter engines that were used prior to 2003 were totally unreliable. In fact, the company was said to have incurred huge losses due to them because many users opted for warranty repairs. There were many recalls also. So, the company resorted to a huge rectification process and the suitable modifications were effected from model year 2005, after which the reliability of these 6.0 L engines has been terrific. The design modifications done were excellent, thanks to the intensive training given to the technicians.

The 6.0 liter engine also faced the EGR valve carbon deposit issue. The problem was that the valves had to be replaced due to clogging of carbon in them and this used to happen during the powertrain warranty period. The company conducted serious research about this and found that extended idle times were responsible for the carbon buildup. The factor behind this was that the combustion efficiency of diesel engines at idle speeds was usually low. By updating the programming of the powertrain control module, the company could solve this issue.

When you opt to buy a used F250 6.0 Turbo Diesel engine for your vehicle, you should search with patience or otherwise, you run the risk of choosing a wrong engine. It is not that you should approach this issue with a dose of skepticism but you should adopt utmost caution. Choosing the right dealer who can guide you properly and having your own mechanic along with you for inspecting the engine are the right prescriptions for having the right motor for your vehicle.


Used F250 6.0 Turbo Diesel Engine

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