Each car brand has its own strengths. Manufacturers are trying to attract as many buyers as possible, highlighting their models with an unusually beautiful design, advanced technologies, cozy salons, low prices and other benefits. Some brands are considered particularly successful, others have a bad reputation or are simply unpopular. Likewise, there are cars that have gone down in history as efficient, durable and trouble-free designs, or have become an endless source of headaches for their owners.
In a modern high-tech car, there are too many components that can fail. Each specific model has its own weak points, but at least half of the problems are born in the engine compartment - due to problems in the transmission and, in fact, in the engine. This is one of the most important parts in the car, and if it is not good, then the rest is not very pleasant either. For buyers, the choice of powertrain can reflect whether their future life will be a hassle-free joy or a sheer nightmare.
Cars with the lowest quality motors
Today, there are a lot of mass-produced engines on the market, which cause a lot of inconvenience to owners. New technologies - start-stop systems, cylinder deactivation, hybrid drives, volume reduction and the use of ultra-light materials for weight loss - only fully manifest themselves in real life, and the difference between the test bench and everyday work is becoming more noticeable.
Whether it's poor engineering, materials, or assembly method, crappy motors can quickly ruin the joy of driving. Market researchers emphasize that in practice, this leads to a decrease in overall consumer satisfaction. “Only 20 percent of all respondents faced with similar problems are willing to risk again by buying a car of the same make,” analysts say.
This raises the important question of which engines can be considered the worst ever built. In identifying the most serious offenders, we will not focus on classical or modern models - we will cover both groups. Here are some examples of engines and machines equipped with them that should be avoided. Some, suffering from birth defects, are prone to catastrophic failures from the first days, others are simply annoying with frequent minor problems.
1. Toyota 3.0 L V6
In 1997-2002 Toyota cars, the three-liter V6 is prone to jamming. The manufacturer blames the owners for not changing the oil often enough or using the wrong one. liquid, however many experts disagree, suggesting that the cause is defects in the circulation system and cooling.
Affected models include 6-cylinder versions of the 1997-2002 Toyota Camry, Avalon, Sienna, Highlander and Solara. The Lexus ES300 and RX300 used the same ill-fated 3.0-liter V6.
After 2002, Toyota made some improvements that should have solved the problem. In 2007, the company struggled to resolve a class action lawsuit involving an estimated 2.5 million models. Toyota and Lexus built between 1997 and 2002 and exposed to excessive contamination engine. The automaker agreed to repair engines clogged with sludge within eight years after leaving the factory.
2. Audi / VW 1.8T four-cylinder turbo (EA113, EA827)
Those looking for a car with a decent four-cylinder petrol unit should skip the popular a 1.8T turbo engine developed by the Volkswagen-Audi concern (VAG) and was widely used from 1997 to 2004 year.
The 1.8-liter turbocharged four offered decent horsepower for its value, but some engineering mistakes paved the way for it on the list of the worst engines. Aggregates with a 1.8T badge, codenamed EA113 or EA827, are found in different cars - from Skoda Octavia to the more luxurious Audi A6, A4 and TT Coupé and virtually the entire model range Volkswagen.
This particular engine tends to consume more oil than most similar engines. It is also known for its tendency to excessive sludge formation, which is very expensive to remove. Also, this turbine unit often fails with coil blocks. So if you want a car that is easy to live with, you need to look at VAG products with other, less moody engines.
3. Nissan 2.5L with 4 cylinders
The pre-catalytic converter built into the exhaust manifold of a 2.5-liter four-cylinder Nissan unit can deteriorate with age. Peeling ceramic particles are sucked back, causing increased oil and coolant consumption and, ultimately, self-destruction of the power unit.
This is common among the 2.5-liter four-cylinder versions of the 2002 and 2003 Altima, as well as the Sentra with the same engine. Later variations of the Altima and Sentra SE-R, equipped with the same engine and produced between January and May 2006, are prone to unusually high oil consumption. This is fraught with premature engine failure and could potentially lead to a fire, so owners of any car with It is recommended to replenish stocks of engine oil more often with a 2.5-liter Nissan power unit and carefully monitor level. In addition, these engines can swallow throttle screws - another potential hazard.
4. Mazda "Renesis" 1.3 l
For all its renowned simplicity and performance, Mazda's new lightweight rotary engine generation Renesis 1.3L has shown a number of problems since its debut in 2004 in Mazda RX-8. He has an insatiable appetite for motor oil. Moreover, the RX-8 from 2004-2005, as well as some versions of 2006, suffered damage to the catalytic converter due to oil migration downstream.
Without abundant lubrication, the upper engine seals can wear prematurely. which leads to a decrease in compression and the need for expensive repairs in a relatively early age.
It is believed that the battery and starter of the RX-8 are more likely to fail in cold climates. Owners are also frustrated with the engine's propensity to flood if it is started and turned off for a short time - for example, during a parking maneuver.
5. BMW 2.0 N47 (N47D20)
A noticeable rattle and roar of diesel engines can be one of the characteristic features of this type of engine. However, some of them rumble harder than others, especially when it comes to the BMW N47 family. It delivers great power with minimal fuel consumption, but saving money on fuel can result in high repair bills.
One of the main reasons why these motors deserve their place on the list of the worst is not their loud voice, but a quick and almost inevitable failure. Trouble is caused by the usual wear of the timing chain.
Sudden stop is one of the strange things that can happen with some versions of BMW, where a worn gas distribution mechanism forces the engine control unit to switch to mode braking. It can also cause collateral damage, often leading to the most costly repair option, engine replacement. The takeaway is simple: either check your BMW frequently, or beware of the N47 four-cylinder diesel versions when buying.
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6. Ford Modular Engines 4,6L / 5,4L / 6,8L
Twin-valve 4.6- and 5.4-liter V8s and an impressive 6.8-liter V10 powering many Lincoln, Ford and Mercury models 1997-2004, cause concern due to improper or missing spark plug threads in heads cylinders. Owners reported that sometimes spark plugs just flew out of their engines - in one case, breaking through the bonnet.
Ford acknowledged this problem in TSB 07-21-2, the official repair procedure for vehicles with expired the warranty period provided for the use of a special aluminum insert and a special set tools. The 5.4L Triton engine was rated by experts as the worst.
The opposite problem may also arise (found in many models from 2004-2008 with power plants of the same size, but with three valves per cylinder): the uniquely designed two-piece body plug breaks, leaving the bottom segment deep stuck in the groove. Faced with a large-scale phenomenon, Ford began to offer car enthusiasts and workshops special tools for removing jammed "traffic jams". Renovations can be surprisingly expensive and tedious.
But in contrast to similar engines and the cars on which they are installed, there are cars that do not cause big problems for car owners, and among them - 5 quality Japanese models.
A source: https://novate.ru/blogs/030621/59225/
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