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The MAZDA5, Mazda's compact minivan, returns for 2010 with no engine changes. The MAZDA5 is based on the previous-generation MAZDA3, and shares its four-cylinder engine.

The MAZDA5's sole engine is a 2.3-liter DOHC inline four. Known as the L3-VE, this 16-valve engine is part of the MZR family, used by nearly all Mazda passenger cars. All MZR engines are all-aluminum, with an open-deck cylinder block for reduced weight and improved cooling; vibration-quelling counter-rotating balance shafts; chain-driven overhead camshafts; variable intake valve timing; and intake runners optimized for better mid-range performance. The L3-VE engine is undersquare, with a bore of 87.5 mm and a stroke of 94.0 mm, to improve low-speed response. The MAZDA5's version has a compression ratio of 9.7:1, and makes 153 horsepower and 148 lb-ft of torque.

While this engine provided ample power in last year's MAZDA3, the MAZDA5's extra weight saps some of its energy. Critics find it reasonably peppy with either transmission, but it feels somewhat underpowered for high-speed merging or passing. The 2.3-liter engine has a sporty growl when accelerating, which some reviewers find tiresome. It is generally smooth and refined, although it throbs a little at idle speed, despite its twin balance shafts.

While compact MPVs of this size are common in Europe, the MAZDA5 has few direct competitors in the U.S. Most rival minivans and crossovers are considerably larger, with V6 engines that produce more power, but also burn more fuel. The MAZDA5's EPA estimated fuel economy, 22/28 with manual transmission, 21/27 with automatic, splits the difference between a compact car and a midsize sedan. Mazda recommends regular fuel.

The 2010 MAZDA3 uses a new 2.5-liter version of this engine, the L5-VE, with 170 horsepower and 167 lb-ft of torque. That engine will probably replace the MAZDA5's 2.3-liter engine in future model years.

Find out more about Mazda MAZDA5 Engine and other industry specific topics.

A Closer Look at the All-new 2008 Infiniti G37

The 2008 Infiniti G37, Nissan's newest sports coupe that is expected to replace the Infiniti G35 will make its world premiere at the upcoming 2007 New York International Auto Show early this April. Available in three model trims - G37 Coupe, G37 Coupe Journey, and G37 Coupe Sport 6MT, the sports coupe will roll out in Infiniti dealer showrooms all over the United States beginning in August.

According to Nissan's Infiniti division, "The all-new 2008 Infiniti G37 Coupe combines the exhilarating performance, stunning styling and modern, sporty interior of the original Infiniti G Coupe, accelerating each to new levels."

The all-new 2008 Infiniti G37 sports coupe features an all-new exterior body styling and design with aggressive appearance highlighted by flowing front fender lines, wave-from hood, double arch grille, and integrated fog lamps. Other key exterior features found on the all-new 2008 Infiniti G37 include standard Infiniti signature L-shape High Intensity Discharge (HID) bi-xenon headlights; available Adaptive Front lighting System (AFS); LED Infiniti G-style taillights; standard rear underbody air diffusers; large diameter dual exhaust; available sliding glass moon roof; available heated outside mirrors; and standard 5-spoke 18-inch aluminium alloy wheels with 225/50VR18 all-season tires. In addition, Infiniti also offers an optional exterior package for the all-new G37 Coupe called the Sport Package. This package includes unique front fascia, side sills, and rear spoiler for the Infiniti G37 Coupe Journey and G37 Coupe Sport 6MT. New 10-spoke 19-inch front wheels and 225/45WR19 front all season tires and 19-inch rear wheels with 245/40WR19 rear tires are available as an optional feature.

Inside, the all-new 2008 Infiniti G37 is equipped with a host of standard interior features and other luxurious amenities for customers. The Infiniti G37 comes with standard interior features including Infiniti signature “double-wave” instrument panel and Infiniti-signature analogue clock; full-length centre console with a leather and aluminium-clad shifter; 7.0-inch color monitor display, leather-appointed seats; 8-way power-adjustable driver’s seat and 4-way power-adjustable front passenger’s seat; and hand-stitched leather-wrapped steering wheel with steering wheel-mounted audio and cruise control switches. Moreover, the new G37 Coupe is equipped with quality infotainment systems including premium audio system featuring in-dash CD player with Radio Data System (RDS), auxiliary audio input, MP3 playback capability, 6 speakers, and XM Satellite Radio.

Optional interior amenities include magnesium automatic transmission paddle shifters, RearView monitor, and Sport Package with sport-styled seats with thigh extensions, driver’s power adjustable torso, thigh bolsters, and aluminum pedals, Infiniti Navigation System with available XM NavTraffic real-time traffic information, voice activation for navigation, and audio and HVAC functions, 11-speaker Infiniti “Studio on Wheels” audio system with 24-bit Burr Brown DAC, 3-way door speaker arrays with 10-inch woofers; and Bluetooth® hands-free phone system.

For Infiniti luxury cars, safety for occupants is the main priority. The new G37 features a wide array of standard safety components like the Infiniti Advanced Air Bag System (AABS) with dual-stage front supplemental air bags with seat belt sensors and occupant classification sensor; front-seat and roof-mounted front and rear curtain side-impact supplemental air bags; front seat belt adjustable upper anchors with pretensioners and load limiters; and front seat active head restraints. In addition, the G37 Coupe's body is made of Zone Body construction with energy-dispersing side structure to further ensure driving safety.

Infiniti offers a single power plant for the new G37 Coupe. All models are equipped with a new 3.7-litre VVEL 24-valve DOHC V6 engine under the hood delivering 330 horsepower and 270 lb-ft of peak torque, with Variable Valve Event and Lift (VVEL) intake camshafts. The engine is combined with either a 5-speed automatic transmission with Downshift Rev Matching and quick-shift DS mode and ASC (Adaptive Shift Control), or a 6-speed manual transmission. The G37 Coupe also features quality clutch parts like its competitor, the Mercedes-Benz C-Class models with Mercedes pressure plates.

About the Author

Dwyane Thomas is a part time cook and full-time auto-enthusiast. This 31-year old Civil and Environmental graduate is a consultant at one of the engineering firms in Pennsylvania.

1997 Mitsubishi Eclipse 2.0 non turbo timing belt broke! HELP!?

My car was overheating because the water pump was pouring out the water. I needed to get only a few more blocks so I kept putting water in it while it was running then I would drive a bit more. Ok, well the car just died. Shut down. When I opened the timing belt cover I noticed the belt is very loose. What happened? What test can I do to make sure my valves arent damaged? Do I absolutely need to remove the head? DOHC by the way. 128'000 miles. Would like to fix it as the body and paint and everything is excellent. My email is fitexcell@yahoo.com if anyone has an answer for this. I thank you in advance! Thank you!

First thing that you should do is buy a repair manual so that you can check the timing marks.

Or, if the engine still turns over, go to an autoparts store and buy a compression tester. These are not hard to use. First thing you do is disconnect the fuse that controls the fuel pump. Next unscrew a spark plug and screw the gauge in and crank the motor over a couple of times. You should get reading above 120 psi for your motor. Do this for every cylinder, you have 4. If the compression is very low, then you know that something is definitely wrong and you will probably be pulling the head and having it rebuilt.

Someone earlier said that you have a mitsubishi motor, you actually have a 420A chrysler motor. Same block as a dodge neon and a few other cars.

If you could pull the head yourself, not hard actually, just takes some confidence and a repair manual then getting it rebuilt should be under $500. Plus a gasket kit, timing belt and water pump.

Good luck.

Go to dsmtuners.com , this site has a great forum and many many knowledgeable users.

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