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Altima Catalytic Converter
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 NISSAN Altima 2002 3.5L Catalytic Converter  US $230.00
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 NISSAN Altima 2005 3.5L Catalytic Converter US $230.00
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 NISSAN Altima 2004 3.5L Catalytic Converter US $230.00
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 NISSAN Altima 2003 3.5L Catalytic Converter US $230.00
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 07-09 Altima 2.5 Engine Pipe Flex Catalytic Converter W/Gasket US $239.00
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 2007 to 2010 Nissan Altima 2.5L Front Manifold Catalytic Converter US $359.00
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There is no doubt in my mind and the minds of most automotive engineers that hydrogen is the most promising fuels of the future. The only questions that we are all asking are how and when America's automobile manufacturers will make the transition to this clean, renewable energy.
Some companies are convinced that the when is soon and the how is by way of a systematic transition from today's fossil-fueled vehicles to cars and trucks engineered for hydrogen propulsion. One such company is ECD Ovonics. ECD Ovonics and its partners have successfully completed a demonstration project to modify a commercial gasoline/electric hybrid vehicle to run on hydrogen make use of a new low-pressure, metal hydride hydrogen storage system developed and manufactured by Ovonic Hydrogen Systems, LLC.
According to the Environmental Protection Agency (EPA), hybrid-electric vehicles are the most fuel-efficient cars on the road today. "Combining the best features of an internal combustion engine with an electric drive system can significantly improve fuel economy without sacrificing performance or driving range" notes the EPA in its Fuel Economy Guide. A hydrogen fueled hybrid vehicle builds on this underpinning to create a plausible bridge to the future.
Most automobile industry experts agree that the ultimate goal is hydrogen-powered fuel-cell vehicles. Regrettably, the technology required to reach this goal is still in its infancy. However, while the hydrogen hybrid runs on hydrogen just like a fuel-cell vehicle, it can be available much sooner and at a much lower cost. Exhaust emissions are reduced below the current standards and no greenhouse gases are produced. It can share the same refueling equipment and follow codes and standards intended for implementation when fuel-cell vehicles arrive, thereby accelerating infrastructure build-up. This vehicle will also heighten consumer awareness of hydrogen's safety.
The key change to the hybrid vehicle is the installation of the Ovonic Solid Hydrogen Storage System developed and manufactured by Ovonic Hydrogen Systems, LLC...
The major components of the Ovonic system are:
- Two metal hydride fiber-wrapped tanks with a total internal volume of 66 liters that store 3.5 kg of hydrogen at an operating pressure under 300psi;
- Integrated heat exchange system. During refueling, an off-vehicle coolant supply system is connected to dissipate heat from the hydrogen storage tank. When driving, heat from the engine's cooling system is routed to the hydrogen storage tank to facilitate release of hydrogen fuel from the storage tank.
Other modifications to the vehicle were:
- Removal of the original gasoline tank, fuel lines, and catalytic converter;
- Fitting the new hydrogen fuel storage system where the original gasoline tank was, with appropriate vents and leak detectors to ensure safe operation;
- Installation of hydrogen fuel lines equipped with pressure and temperature sensors, four gaseous fuel injectors, an exhaust air-fuel-ratio sensor, and a control computer to operate the new fuel injectors;
- Addition of a turbocharger.
A hybrid hydrogen vehicle with an Ovonic metal hydride onboard hydrogen storage system demonstrated excellent potential for meeting both fuel cost and driving range targets established by the Department of Energy (DOE). Alternative storage methods such as liquid hydrogen inside a super-insulated cryogenic tank and gaseous hydrogen stored at extreme pressures show markedly less potential of meeting future goals than the ECD Ovonics approach.
ECD Ovonics began efforts to perfect metal-hydride technology many years ago and the company has established a dominant position in the field. The Ovonic metal-hydride system engineered by Ovonic Hydrogen Systems, LLC, comprises powdered metallic alloys capable of rapidly absorbing hydrogen.
A metal hydride is formed when gaseous H2 molecules dissociate into individual hydrogen atoms and bond with metal atoms in the storage alloy. Removing heat drives this absorption process, while adding heat reverses the chemical reaction, causing the hydrogen atoms to reform as H2 molecules inside the storage vessel.
This metal-hydride approach offers several advantages in powering hydrogen-fueled vehicles over other types of systems. Storage density is significantly higher than high-pressure gaseous alternative. The technology needed to store hydrogen within metal hydrides has gone through hundreds of refilling cycles with minimal performance degradation. Finally, the metal-hydride system is fully scalable and can be adapted for a variety of mobile tanks as well as larger scale systems for filling-station storage.
The hybrid vehicle modified by ECD Ovonics has a driving range of nearly 200 miles and requires about 8 minutes for refueling using a filling pressure of 1500 psi.
The only thing that ECD Ovonics is not talking about is the cost. As with any new technology, the cost of either converting or manufacturing these types of vehicles has to be weighed against the cost of operation, at even the worst case scenarios, of fossil fuel powered vehicles. For example, the difference in cost between a Chevrolet Volt and a gas powered Nisan Altima could buy you enough gas at today's prices to drive 313,000 miles. Neither vehicle could be expected to last long enough to recoup the price difference.
Tom Price is a contributing editor at Improve Your Gas Mileage. More of his work can be found at http://improveyourgasmileage.com which is a site dedicated to researching driving methods, maintenance tips and other fuel saving ideas. Improve Your Gas Mileage also tests and reviews all types of fuel saving products. We can tell you which work and which ones are just a waste of money.
Consumers Believe Following Gas-saving Tips Can Help
Due to inadequate supply of gas in the world market that is caused by its increasing demand, gas prices continue to increase up to the point the consumers are now very cautious in their buying decisions just to minimize gas usage. And because the auto industry does not want to loose profits, it abundantly supplies the public with pieces of fuel economy advice who want to save a few dollars at the gas pumping station. Most of the time, drivers are advised to increase their vehicles’ fuel economy by minimizing the use of air conditioning, regularly changing the filters, periodically checking tire pressure, keeping fuel injectors clean, and using a fuel additive to increase the performance of the engine.
But are the consumers really using these tips to save money at the pump?
A recent Kelley Blue Book Marketing Research study on fuel economy revealed that 6 out of 10 consumers respond they would be likely to alter their filters at scheduled intervals and/or check their tire pressure periodically in order to achieve greater fuel economy or save money. Moreover, 7 (68 percent) out of 10 consumers say that they would save up to $200 annually by following some or all of the suggested gas-saving maintenance tips to their car.
According to Jack Nerad, the executive editorial director and executive market analyst for Kelley Blue Book's kbb.com, prices of gas have now reached the points where consumers are forced to take steps which they may not have when these prices were relatively lower to enhance fuel economy and save little money. He said that if the heavily burdened consumers actually perform all the recommended tips for economizing gas, most probably they could save up to 15 or 20 percent of their entire yearly fuel costs.
On the result of the study, however, only very few or 23 percent say that they would be willing to lessen the use of air conditioning. Even few (17 percent) say that they would be willing to regularly clean their vehicles’ fuel injectors as well as to use a fuel additive in each fill-up to improve engine performance (5 percent).
Twenty-six (26) percent or more than a quarter says that in order to achieve greater fuel economy or save money, they would employ all the recommended fuel-saving tips from Kelley Blue Book; while only 5 percent say they would do none.
In order to improve their fuel economy or monetary situation, 69 percent of the respondents are likely to change the vehicle they drive. Twenty-two (22) percent respond that they would purchase a hybrid version of a vehicle they already have. Some (14 percent) say they would acquire a vehicle with a smaller engine or an engine with less power (because smaller or less performing engines require only few amounts of fuel). Twelve percent say they would purchase a diesel vehicle, while 31 percent say they would not change their next vehicle to improve fuel economy.
In its second generation now, the Toyota Prius is approaching its fifth model year and it still dominates the hybrid market. But this does not make the Prius belong to the Kelley Blue Book's Kbb.com Editors' Top Picks for Best Fuel-Efficient Vehicles due to the car’s unfitness to every lifestyle. The list is composed of fuel-efficient favorites filled with something for consumer.
Jack Nerad, the executive editorial director and executive market analyst for Kelley Blue Book's kbb.com, said that they certainly think that today and tomorrow’s market has and will still have an important place for the hybrid vehicles. He added that the present market offers a wide array of vehicles that both satisfy the individuals' needs and provide really excellent fuel efficiency.
The Blue Book list includes the editors’ top choices which include Honda Civic Hybrid (small sedan category), Mercedes-Benz E320 Bluetec (luxury sedan), Nissan Altima Hybrid (mid-size sedan), Toyota Tacoma (compact pick up), Chevrolet Silverado and GMC Sierra that is packed with GMC catalytic converter (full-size pick up), Audi TT (coupe), Ford Escape Hybrid (small SUV), Toyota Highlander Hybrid (mid-size SUV), GMC Acadia (large SUV), Mazda MX-5 (convertible), Honda Odyssey (minivan), MINI Cooper (hatchback), and the Toyota Matrix and Pontiac Vibe (wagon).
About Kelley Blue Book (kbb.com)
Kelley Blue Book, The Trusted Resource®, has been providing buyers and seller of vehicles with the new and used vehicle information since 1926. Its top website, kbb.com, gives the most up-to-date pricing and values, including the New Car Blue Book(R) Value, which uncovers what people actually are paying for new cars. In every three American car buyers, a single one performs their research on kbb.com.
About the Author
Iver Penn is a Mass Communications graduate who hails from Wyoming. She is at present an associate editor of a publishing company in Colorado.
I have a 2005 Nissan Altima 2.5s. Need catalytic converter. How do I know if I should replace front or rear? ?
The front catalytic converter is near the manifold and the rear is at the back of the tail pipe. I don't want to replace both. Nissan is quoting me $1,100 and we can't afford that. Will after market work? How do I know which one to replace as Nissan won't tell me which. Estimated cost? Any help appreciated.
Being an 05 I don't know why you would need a new one.What is the complaint you had with it to tell you it needed to be looked at?Not sure about nissan but most cars only have one catalytic converter the one in the rear is normally just a muffler.As far as replacement they might not sell just the part you need by its self but the whole exhaust system.I just helped a friend who had a rattling noise in their trailblazer, they were told 900 to replace everything from the resonator(located in muffler) back to the catalytic converter, simply because of the rattle.My friends were told aftermarket such as pep boys or midas would be able to do it cheaper, but the problem is most newer cars today have a stainless steel exhaust which for the most part will last the lifetime of the car.If you get midas to do the job for you cheaper you don't know what cheap material they are putting under you car, chances are it won't be stainless and will only last you 2-3 years at best before it starts rusting out.As far as a cheaper way would be to cut off the muffler and just put a straight pipe on it.But this might not be the same solution for you depending on what is your problem area.Hope that helps, GL
Timing belts and chains? Time to check the manual
Q. You often talk about timing belts vs. timing chains. How can I tell which my car has, and when I should change it? We have a 2002 Nissan Altima six-cylinder with 106,000 miles, a 2005 Hyundai Elantra four-cylinder with 80,000 miles and a 2006 Hyundai Tucson four-cylinder with 15,000 miles. I'm sure the '06 is good for a while, but what about the others?
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