Standard air intakes systems are highly restrictive sacrificing power or efficiency, to eliminate the engine noise.

Aftermarket cold air intakes systems are available in various sizes and colors and is easy to install, compared to other performance improvement changes. All cold air intakes operate on the principle of increasing the amount of oxygen available for combustion of fuel. Because cooler air has a higher density (more mass per unit volume), cold air intakes generally work by introducing cooler air from outside the hot engine compartment. However, the cold air intakes term is often used incorrectly to describe the air filter, which is exposed to the filter in the engine compartment, which really warms the air entering the engine.

Cold air intakes systems are available in several different styles and can be constructed from plastic, metal, rubber (silicone) or composite (fiberglass, carbon fiber or Kevlar). Cold air intakes systems more efficient to use a AirBox being undertaken to complete the engine and extend the range of engine power. The tuba admission (opening for the intake air in the system) must be large enough to ensure sufficient air available to the engine under all conditions from idle to full throttle.

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The Maxima’s VQ35DE engine is part of Nissan’s ubiquitous VQ engine family, also used in the Altima, Murano, Quest, and earlier versions of the 350Z sports car. The VQ is one of the most respected engines in the auto industry, appearing on Ward’s 10 Best Engines list every year from 1997 to 2007.

The VQ35DE is an all-aluminum, 24-valve DOHC V6, with Nissan’s continuously variable valve timing system (CVTCS) on both the intake and exhaust cams. In 2009, Nissan made extensive changes to this engine, revising the intake and exhaust manifolds; raising its compression ratio from 10.3 to 10.6:1; reducing internal friction and reciprocating mass; and adding CVTCS to the exhaust cam, as well as the intake. Those modifications raised the engine’s output to its present level of 290 horsepower and 261 lb-ft of torque.

The 3.5-liter engine endows the Maxima with strong performance. Some reviewers find off-the-line response slightly lazy, a function of the standard Xtronic continuously variable transmission, but once on the move, acceleration is impressive. Fuel economy is also reasonable for the engine’s size and power. The EPA rates the Maxima at 19/26 city/highway, although the V6 requires premium fuel.

While it is powerful and reasonably frugal, the 3.5-liter V6 is also noticeably gruffer and less refined than the 3.0-liter version of this engine found in earlier Maximas. While some critics like its throaty growl and sporty full-throttle roar, others find it excessively noisy, and complain that it drones at cruising speeds.

A more sophisticated 3.7-liter version of this engine, the VQ37VHR, has replaced the 3.5-liter V6 in the 370Z and most six-cylinder Infinitis. Nissan has not yet announced plans to offer the 3.7-liter engine in the Maxima and Altima.

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Nissan sold the Datsun 810 from 1976-1980 in three body styles: a two-door coupé, a four-door sedan, and a four-door station wagon. In the U.S., all three styles had the same Nissan Maxima engine under the hood, the same Nissan Maxima engine found in the Datsun 240Z, a 2.4-liter SOHC L-Series straight-6.

The Datsun 240Z was Nissan’s first generation of the Z series that would become legendary. Nissan manufactured this generation from 1969-1978 under the names 240Z, 260Z, 280Z, and the Fairlady Z. The Nissan Maxima engine found in the 260Z and 280Z were a 2.6-liter and a 2.8-liter L-Series respectively.

In 1979, the Nissan 280Z evolved into the Nissan 280ZX and the second generation of the Z cars began. Nissan manufactured it from 1979-1983. In the final years of the 280ZX, the Nissan Maxima engine offered with the car was a 2.8-liter available as a turbo or naturally aspirated.

Introduced in 1983, the Nissan 300ZX Z31 was both the successor to the 280ZX and the beginning of the Z series’ third generation. Nissan launched the 300ZX Z32 in 1989 marking the beginning of the line’s fourth generation and continued manufacturing it until 2000. However, in the U.S., Nissan ceased production of the vehicle in 1996. This is despite it being one of the most recognized and rewarded sports vehicles sold in the U.S. at the time. Even at the moment of its departure, Car & Driver magazine included it as part of their Ten Best list.

After a six-year hiatus, the Z car finally returned to America and did so vigorously. The Nissan 350Z engine included with this two-seater in 2003 was a naturally aspirated 3.5-liter DOHC 24-valve V6. This Nissan 350Z engine generated 287 horsepower at 6,200 rpm. This was disappointing to some fans since this was the same V6 used as the Nissan Maxima engine and in the Altima as well.

However, what did have fans of the Z excited was the aggressive pricing and the centerline location of the engine that coupled with the 350Z’s long wheelbase provided amazing handling. Then in 2004, Nissan celebrated the 300ZX when it launched the 350Z Roadster. The Nissan 350Z engine under that hood was primarily the same but sport-tuned for a small bump in horsepower.

In 2006, Nissan introduced a Grand Touring trim, which included a premium interior and an improved Nissan 350Z engine. This engine paired with a manual transmission provided 300 horsepower. In 2007, Nissan made the HR or High-Revving version of the VQ35 available as an option. This Nissan 350Z engine rated at 306 horsepower and boasted an impressive 7,500-rpm redline.

Nissan introduced the sixth and current generation of the Z when they launched the 370Z in 2009. Under the hood, Nissan included a chest-thumping 3.7-liter V6 that generated a potent 332 horsepower and 270 pound-feet of torque.

The problem with a head gasket comes when the gasket begins to leak. The leak can cause serious damage to a Nissan maxima engine if not replaced or repaired quickly because eventually the leak will cause the head gasket to blow. In a car with a blown head gasket, the car will have less power and idle more roughly than before the gasket blew because of the compression loss associated with this engine problem. Another side effect of a bad head gasket is engine overheating. This is caused by gases from the vehicle’s exhaust being forced into the cooling system. Overheating can cause severe and costly engine damage. Due to the loss of compression, coolant from the Nissan Maxima’s cooling system can leak into engine’s cylinders, causing extreme wear and possibly destruction of the vehicle’s catalytic converter, an indispensable piece of the emission control system.

There are a few methods of diagnosing a bad head gasket in a Nissan 350Z engine without taking it to a mechanic. The first sign that a vehicle has a leaky head gasket is in the oil. If the head gasket has been compromised, many times there will be engine coolant in the oil of the vehicle. This will cause the oil to resemble the color and consistency of a chocolate milkshake. This will also show up on the dipstick used for checking the vehicle’s engine oil levels.

On the other hand, a faulty head gasket can cause oil to leak into the engine coolant. This will cause the coolant to take on a dark, muddy appearance. This can be seen in the engine coolant reservoir when the cap is removed. One should always remember not to remove this cap while the engine is hot, as escaping steam can cause severe burns.

Another symptom typical of a bad head gasket in a Nissan Maxima engine is low engine coolant. If the car owner is finding that it is necessary to add engine coolant rather frequently, this is a sign that there is a leak somewhere in the cooling system of the vehicle. In the case of a faulty head gasket, the coolant is leaking into the cylinders of the engine. Another sign of this is coolant around the area where the spark plugs are located.

The 3.5 liter engine that is the Nissan Maxima engine is a high tech unit that employs a number of high tech features that are found both in the Nissan Maxima engine and the Nissan 350Z engine. The most significant feature found in both engines is the variable valve timing feature; the feature increases both the fuel economy and performance of the engine by managing the cam timing. Engine efficiency is also improved by employing low friction molybdenum-coated pistons and a high flow tuned induction system. Nissan also uses a DLC (Diamond Like Carbon) coating on the valve lifter to lower friction. This technology improves both fuel economy and power transfer efficiency, and Nissan is the first company in the world to employ this technology. Both engines are dual overhead cam designs that employ four valves per cylinder. Fuel is sent through the engines in both vehicles using a sequential fuel induction system. While both engines have a compression ratio of 10.6:1, the Nissan 350Z has a 7500 revolutions per minute red line that is significantly higher than the Nissan Maxima engine.

The Nissan 350Z engine underwent an evolution over the 3 years that it was used in the 350Z. The engine was rated at 287 horsepower in its first year of use in the 350Z. The following year that power rating was increased to 300 horsepower. In the final year of use in the 350Z, the power rating increased to 306 horsepower. The increase in horsepower in the Nissan 350Z engine came at the expense of torque. The torque output in the Nissan 350Z engine decreased sustantially, from 278 pound-feet in the 2003 model year to a torque rating of 260 pound-feet in the 2006 model year. The 350Z engine returned outstanding performance figures in all three years of its use. In its final year of use in 2007, the Nissan 350Z engine motivated the car from zero to sixty in 5.8 seconds. The vehicle was able to reach a top speed of 155 miles per hour. Power output in the Nissan Maxima engine is slightly lower than the Nissan 350Z engine; the Nissan 350Z engine produces 290 horsepower at 6400 revolutions per minute.

Like its predecessor, the newest model 350Z should be sporting the same 4-cycle, 6 cylinder, 60-degree slanted gasoline engine, loved by drivers expecting power and smooth handling. Nissan’s VQ35HR (for “High Revolution†or “High Responseâ€) engine will have its usual arrangement of a microfinished one-piece cast crankshaft operating under a timing chain, a bore and stroke of 3.760 in (95.5 mm) and 3.205 in (81.4 mm), and Nissan’s patented high-flow tuned induction system, we should expect the 2010 350Z to have the same NDIS (Nissan Direct Ignition System) and electromagnetic on the exhaust cam CVTC (Continuously Variable-valve Timing Control) with hydraulic actuation on the intake cam. Like its 2009 predecessor, the newest 350Z will have forged steel connecting rods and a nylon intake manifold combining providing the structure for an engine easily capable of delivering a ripping 350hp, redlining at 72,000rpm. With 213.45 cu in of displacement (3,498 cu cm) and 2460 to 268 ft*lbf (334 to 363 N*m) of torque, the 2009 350Z series won Nissan many fans. Are engineers the type to sacrifice a winning formula just to tweak a few specs? Not likely.

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Even the highest quality Nissan cars and trucks will eventually run into mechanical problems (such as engine or transmission problems). Unfortunately, this often happens once Nissan’s warranty is no longer there to protect you from the high cost of automotive repairs. As your Nissan 350Z gets older and you put more miles on it, it gets more and more likely that you will run into problems with your vehicle. An extended warranty will protect you from the significant cost of repairing these issues and gives you peace of mind knowing that your Nissan 350Z will be taken care of in the event that expensive repairs are needed due to engine or transmission problems.

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Your first defense against high repair costs is to get an extended warranty for your Nissan 350Z. If the check engine light being on does represent a significant problem with your vehicle’s transmission, brakes, engine or electrical system, it could cost thousands to repair your Nissan 350Z. An extended warranty will protect you from these high repair costs. Right now, you can get a free quote on an extended warranty for your Nissan 350Z – so click on the link below and request a free, no obligation quote today:

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