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Your engine’s faulty; Demios don’t normally make tractor-like sounds

Hello Baraza,
I really love your column and look forward to the Wednesday issue of the Daily Nation. I hope you will respond to my mail this time round.

Now on to my question: I have a 2005 Mazda Demio and of late, I have been seriously disturbed by a noise coming from under the hood.

The car sounds like a tractor/diesel engine and somebody can tell from a kilometre away that I am approaching. In fact, my children have become so used to the noise that they open the gate when I am still some distance away. Several mechanics have told me that it is the normal sound of Mazda engines. Is this true?

Secondly, the car is a 4WD. How do I know whether the 4WD is damaged or in working condition? Could it be the reason the consumption is not good since the car (1300cc) is doing about 11km/l, which I think is awful.I would greatly appreciate your help. MK

I would say something is definitely broken under the bonnet. Demios do not sound like tractors and/or diesel powered cars, unless so equipped. You might have an engine with a knock.

To test the 4WD, you could jack the car up, i.e put it on stands/stones. Just to be safe, prop up all four wheels.

Start the vehicle, then engage the transmission (D or first gear, depending on transmission type). Observe the wheels. If the 4WD is functional, all four wheels should spin.

If they do not, then the 4WD drivetrain has a problem, though I suspect you might get a dashboard light warning you of something to that effect.

Drivetrain problems could be a reason for high fuel consumption, though at 11 km/l, I would first ask what your driving style and environment look like before pointing a finger at the 4WD.

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Hello Baraza,
I am a great fan of your column, which I read religiously every Wednesday. I am in the process of importing a car and after looking at a few options (the usual Honda Fit, Mazda Demio, Honda Mobilio Spike), I settled on a Fiat Panda.

It is a 1200cc automanual model and I would think it might be the only one on Kenyan roads. What is your opinion of the car? I am comforted by the fact that the guys at Top Gear really liked it….

Fiat has a reputation for making unreliable cars and this might actually be reflected all across the range.

Fiat cars have long been known to break down not very long into the vehicle’s lifespan, as do Alfa Romeos, which are made by Fiat, while certain models of Ferrari (another Fiat brand) tend to spontaneously combust, which could be seen as a reliability issue. You cannot call a car reliable if it catches fire by itself, can you?

Let Top Gear be. The UK market is more varied and more forgiving than ours. Cars there, being mostly brand-new, are protected by warranties and dedicated dealer networks; Britons rarely ask whether spares for a particular car are available.

They know there exists such a thing as the internet, which they put to good use (mostly). So, for a motoring journalist with a six-figure annual income (in pounds sterling), a Fiat Panda is more an object of amusement and experimentation than the sole solution to his transport needs, as could be your case. Buy it at your own risk.

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Dear Mr Baraza,
Having just sold my Toyota Surf, I am planning to buy a Nissan Patrol 2007 model, diesel, or a Harrier Lexus 2006/07 model, petrol. I would greatly appreciate your advice. Pandit

This is what we call a vague or ambiguous question. What, exactly, is your dilemma? I think in a case like this, you decide what you want, whether it is a Nissan Patrol or a Toyota Harrier or a Lexus RX.

The purchase will mostly depend on how much money you have to spare and what you intend to use the car for. Do not buy the Patrol if you do not do any serious off-road excursions.

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Hi Baraza,
I want your expert advice on the following cars:
1) Between the Toyota Belta 1000cc and 1300cc, which is better for Kenyan roads and fuel efficiency?
2) Is the Toyota Passo 1300 cc better than the Vitz?
3) Is the Nissan Tiida 1490cc a good car to drive and is it fuel-efficient?
4) When importing the above cars from Japan, is it okay to buy cars with mileage above 87,000 kilometres or will they break down?
Andy

1. The 1000cc car is better in fuel efficiency if you are using it in the city. The 1300 will be more appropriate for extended highway use.

In this era of the NTSA and its sometimes mind-boggling speed limits, you might be better off with the 1000cc car. You might not need the extra 300cc, especially if your car does not bear loads that extend beyond your person.

2. Better in what way? The Vitz might be the better car overall.

3. Yes, it is a good car to drive, although the 1500cc version feels a bit underpowered. But remember the NTSA and its speed limits, so you do not exactly need a very powerful Nissan car to drive around the country.

4. They will break down. However, being Japanese cars, this breakdown will happen later rather than sooner. The good thing is, a car with an odo reading above 87,000km will obviously be cheaper than one with lower mileage.

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Hello Sir,
I am a young hustler whose father uses a Toyota Fielder 1400cc 2006 model. I admire the vehicle for its fuel efficiency, stability, and comfort.

I want to buy a vehicle for myself and would like a fuel-efficient one (like the Fielder). My favourite models are the Fielder, Avensis, and Allion. Kindly advise.
Thanks, and I appreciate your work. John Maina

Well, now that you are already familiar with the Fielder, it will not hurt if you get one of your own, will it? The consumption figures are not very much different with the Avensis and the Allion, but there is comfort in familiarity.

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Dear John,
It was a cold day in Wolfsburg, Germany, when your current car, the Mazda Demio, won the World Car of the Year in 2008, its heyday.

However, in true German fashion, the VW board summoned their engineers and ordered them to create the finest hatchback floorpan in the automotive world and wipe the smug smile off the faces of the Japanese Demio makers.

Money was no object. The result was the VW Golf Mark 5, each built carefully in 50 hours bristling with innovation, with a Euro NCAP 5-star rating to boot, which was promptly crowned World Car of the Year 2009.

Richard Hammond, a Top Gear presenter, even had a Mark 5 Golf struck by 600,000 volts of nature’s finest lighting while seated inside as a testament to its German over-engineering.

However, the fly in the ointment and let-down to many Kenyan motorists who ship the used version of this car from Japan is the DSG gearbox which, in simple terms, is two separate manual gearboxes (and clutches), contained within one housing and working as one unit.

It was designed by Herr and was initially licensed to the Volkswagen Group. Designed to shift gears more smoothly than a conventional manual gearbox and quicker than your reflexes, this automated manual gearbox resulted in a worldwide recall by VW of 1.6 million sold vehicles.

This has caused grief to many a Golf Mark 5 owner, who experience intermittent transmission jerking, usually at low speed, and agonising delays in shifting down once the car has warmed up. VW has finally figured out the cause after a lot of head scratching since the computer does not produce any fault codes.

Apparently, the DSG transmission has a protection mechanism switch built in that prevents excessive power from being delivered to it if the brakes are engaged.

When you take your foot off the brake and step on the accelerator for power, the switch lags and makes the transmission tranny think the brakes are still on, resulting in the annoying shifting delays. Once this brake switch sensor is replaced, the fly is removed from the German ointment.

As a preventative measure, it is also worthwhile to drain all the synthetic gearbox oil from the Golf Mark 5 with a DSG gearbox  and replace it with a good quality mineral oil before making the maiden trip from Mombasa port to Nairobi as VW has confirmed during recalls that in hot climates, the synthetic oil causes short circuits in the gearbox power supply due to build-up of sulphur, a scenario absent in the frigid testing grounds of Wolfsburg.

Lots of innovations remain true to form, like the fuel stratified injection (FSI) engine in the Golf Mark 5 gem in increasing fuel economy in tandem with power, and is kinder to the environment and better built than the Toyota D4 and Mitsubishi GDI employing similar engine concepts. The only catch is to ensure that no adulterated fuel ever enters the filler cap.

The ultimate Golf mark 5 innovation has to do with safety, giving it a Jekyll and Hyde personality; a safe family car packed with curtain airbags, ESP wizardly, and doors like a steel safe to ferry the children to summer camp when needed to a non-turbo Impreza and Evo thrashing hatchback when provoked by their loud exhausts on the way back home to a classy, yet frugal transporter to work on Monday.

Truly, the Golf is the car you will ever need, even in the land where the car in front is always a papier-mâché Toyota. VW fan club member

This is very enlightening. And yes, the Golf is a marvellous car; too bad about the DSG. Impressive gearbox, this one, if a little glitch-prone. I would still have me a pukka three-pedal, six-on-the-floor Golf (GTI, to be specific) if I had the inclination.

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Kindly tell me how a Toyota D4 engine is different from that of other Toyotas and how I can achieve maximum performance.
Also, what is its consumption (km/petrol) rate?

Toyota’s D4 engine is different from (some) others in that it uses direct injection rather than port injection. Direct injection is where the fuel is delivered directly into the cylinders of the engine, where it mixes with air and is then ignited by the spark plug.

This is at variance with previously established systems of port injection, in which fuel was injected/fed into the intake port, where it mixes with air before being delivered into the engine’s cylinders.

Achieving maximum performance is simple. Use high-octane (and reputable) fuel and stomp on the accelerator pedal as hard as you can. The fuel consumption varies, depending on the size of the engine and the size of the vehicle bearing that engine.

D4 engines are quite economical. However, when maximising performance, do not expect the fuel consumption to be impressive.

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The Tiggo will have criminals ‘shivering’ with laughter

Hi Baraza,
What is your take on the Kenyan government supplying police officers and provincial administration with the Cherry Tiggo cars? Are the cars the best they can use, considering that countries like the US use patrol cars that cannot be sold to the public, such as the Ford Victoria Crown and Dodge?

Is there any feature of the cars that can make criminals shiver at their sight? Are the cars meant for countries like Kenya, where most roads are not tarmacked? I think this was the reason behind the use of the Toyota Land Cruiser and the Land Rover.

Finally, are the Tiggos stable enough for high speed chases (like the Peugeot 504) or will they roll over, just like the military lorries do even at very low speed? I also fear that they may become old (lose shape) like the ones being used by the Chinese engineers constructing Thika road.

Walkins

You would be surprised that ex-police cruisers can be and are sold to the public in the US (after disarming them of the dash-stored shotguns and computers connected to security databases), especially the Crown Victoria and the Chevy Caprice.

The only reason criminals would shiver would be with laughter at the sight of the government’s cheapness in supplying Tiggos to the boys in blue. Not that they care, anyway.

The Chinese car would not be bad for the untarmacked roads, but their longevity is questionable. And gone are the days of the high speed police chase; nowadays they will just push a stinger into the path of the escaping felon and his goose would be well and truly cooked.

If and when the cops chase down the criminal, he could at least hope that the pursuit vehicle will age and break down some time during the chase (the reputation of China-sourced products).

Hi Baraza,

How does the Toyota Opa compare to the Toyota Fielder in terms of performance, handling, cost of maintenance, resale value, comfort, stability and power? I also want to know why you say the Opa is ugly and yet there are uglier cars, or is it just because beauty lies in the eye of the beholder?

Performance should be better than the Fielder, as is handling, but maintenance costs will depend on how well you take care of it. One on one, the D4 engine and the optional CVT transmission are harder to fix (and will thus cost more) than the equivalent VVT-i and auto/manual gearbox in the Fielder.

Resale value will be next to nothing, but if you can find a fellow Opa-lover, then all the best. Comfort: Very good, for the price and class. Stability: Better than the Fielder, but it is still not an F1 car. Power: 1.8 litre D4 performance, which means about 150 hp.

About its ugliness, just because there are other ugly cars, does that mean I should call the Opa pretty? If four students do an IQ test and one student gets a score of 1, and three others get 0, does that make that one student a genius? No, it is just that three other students happen to be less intellectually endowed. Same thing here; the Opa is still quite unsightly, whether or not Verossas and Wills exist.

Dear Baraza,

I want to move from a five- to seven-seater car to accommodate my family. Looking around, the following appealed to me because of looks, fuel economy, and parking space: Peugeot 307, Volkswagen Touran, Toyota Sienta, Honda Mobilio, and Nissan Cubecubic. I also visited CMC and saw the Maruti 800cc van.

What are your comments on these cars and which one would you recommend?

Muteti

From your list, I would say the Touran is the best seven-seater car. It is the most comfortable, has good power delivery, a six-speed gearbox, is highly versatile, and has Volkswagen’s bullet-proof build quality. Too bad it took an army friend of mine several attempts to get the gearbox fixed at CMC Motors before he was satisfied.

The 307 is also a good car, but with the French known to be unreliable, it may not be the best buy if you have resale value in mind. The Toyotas, Hondas, and Nissans are generic Japanese products that I am yet to assess (but I strongly suspect there is not much difference between them).

That 800cc Maruti is another thing altogether. It will seat seven people, yes, much in the same way back in the day my three sisters and I could fit in one red KP&TC telephone booth when making a phone call to daddy at work.

It is not an experience you will particularly enjoy or want to repeat daily. The Maruti is a small-capacity delivery van (mostly for pizzas or inter-office documents), not a Swiss family mobility solution.
Of the lot, I pick the Touran.

Hi,

What is the difference between the 2004/5 Lexus RX 300/330 and Toyota Harrier 240G/300G besides engine displacement? These cars are identical! Which would you go, considering spare parts availability and running costs?

Tony

Besides displacement, the only other difference is the logo in the grille up front. Such vehicles as the Toyota Harrier, Aristo, Altezza, Crown, and Land Cruiser Cygnus (the top-rung 100 VX model) existed because at the time the Lexus brand was not available on sale in Japan, so they were rebranded as Toyota.

Their respective Lexus equivalents were the RX 300, GS 300, IS 200 (and IS 250 in the US), LS 400, and LX 470. There was even a “Lexusized” J120 Prado called the GX 450.

In my world, availability of spares and running costs mean diddly squat, so I would go for the one with the biggest engine and the most horsepower and with the most apportionment (options like leather, climate control, and sun-roof).

For the cash-sensitive types, the diametric opposite of my desire is what they should settle for; the smallest engine with the bare minimum of optional extras.

Hi Baraza,

1. Between a 6-litre V8 engine and a 6-litre V12 engine, which one consumes more fuel? Is it engine displacement or the number of cylinders in the engine?

2. I have been seeing exotic modern cars (Aston Martin, Ferrari, Bentleys, Rolls Royce, etc) in Nairobi streets. Where are these cars serviced? It is not that I am aspiring to buy these cars in the near future, a turbo-charged Subaru is good enough for me.

1. Given the extent of automotive engineering thus far, it is neither of the options you list there. Genius and boffinry will determine the consumption capabilities.

Engine management (injection maps, variable valve timing), supplementary innovations (variable intake plena, active exhausts, use of forced induction, injector and plug placement/relationship, cylinder deactivation, charged gasoline injection, etc), the shape and design of combustion chambers, intake manifolds and exhaust manifolds, along with a whole lot of other things will determine the fuel consumption of an engine.

That is why the CL 65 AMG Mercedes-Benz coupe is a 600 hp monster that can still manage 11 kpl.

2. These vehicles belong to individuals who prefer to stay outside the scope of the public eye. I have seen them too. My presumption is that given what it costs to buy one (and the kind of brain power that goes into building one), it is only natural for the owners to send the vehicle back to the makers for servicing.

Either that or factory engineers are flown in with a complete tool kit to service the vehicle from the privacy of the owner’s home.

Hi,

I want to know about the work of the cylinders in a car and why they vary from vehicle to vehicle, for example, some have four while others have eight cylinders. Aside from that, you are always sceptical about the Cadillac Escalade and yet it is still one of the most prestigious vehicles today.

So how do you rate the Cadillac CTS-V in terms of performance, power (which I assume is quite a lot with the over 400 hp), comfort, stability, and fuel economy?

Three cylinders or less are typically used in less than 1.0-litre capacity engines (except the noisy tractor road-building equipment that uses just one but displaces more than 1.0 litre).

Four cylinders (in line) are good for fuel economy. V4 engines are noisy, and prone to vibrations, which requires the use of heavy crankshaft journals and flywheels to dampen the vibrations.

As a result, they make the car nose heavy, that is why they found limited use in cars. They are used for bikes, though. Horizontally opposed or “flat” four engines (H4) provide even weight distribution, and no, they do not wear the cylinders out on one side, as some people assume.

Five-cylinder engines are not much different from 4-cylinder ones.Most provide extra capacity without resorting to enlargement of cylinders. This applies to both V5 and in-line 5 engines. Six cylinder engines have legendary smoothness and good top-end (high rev) power characteristics.

That is why Lexus used them to great effect in their smaller saloons. The top-end power applies to both in-line 6 (Nissan Skyline GTR, Toyota Supra Mk IV, BMW M3) and V6 engines (Nissan GTR R35, Lotus Evora).

V6 engines have the added benefit of being compact, allowing for a more stubby bonnet or installation in a mid-ship platform, what we call mid-engined cars, or rear engine chassis.

Eight-cylinder engines develop huge torque. Straight 8s saw action a long time ago but these died a natural death. It was only sensible to make V8s. W8 engines were recently “discovered”, but since they involve the juxtaposition of two V4s, they do not get much airtime.

Twelve-cylinder engines have very good power and can rev to “abnormal” levels (the V12 in the Ferrari F50 road car could soar to about 10,000 rpm).

That is why they are used in top-end sports and performance cars (Lamborghini, Ferrari, top-flight Mercedes-Benz AMG and BRABUS cars). Sadly, the engine in the recently released Lamborghini Aventador will have the last automotive V12 to be used as manufacturers are now favouring turbo-charged V8s, which are simpler to build, more robust, and meet ever-tightening emissions standards.

Weirdly, some army tanks also use V12 engines, diesel powered. V10 engines share tendencies with V12s.

Beyond this point, most engines take a W configuration rather than V for the sake of length. The W12 engine (a creation of the VW Group and commonly found in Bentley and Audi) is just the mating of two V6s, side by side. The W16 (Bugatti Veyron) is the joining of two V8s.

The CTS-V is America finally waking up to the realities of life. The original 400 hp car was good (which is saying a lot for a Yank Tank), but the 556 hp supercharged version was great (this has never been said of any American car).

The blown CTS-V killed the BMW M5’s lap record for fastest four-door saloon at the Nurburgring, what with the M5 having two more cylinders (V10 vs the Caddy’s V8) and 50 less hp.

This war is not over. BMW have brought out a new M5 (the F10). They have gone back to V8 engines, they have lowered the engine capacity but (the trump card) to compensate for that, the M car now has two turbochargers slotted under the bonnet.

Initial reports indicate the car goes like stink and is so good it could end hunger in sub-Saharan Africa and bring peace in the Middle East — this is of course an exaggeration. The car will actually bring more war as each country fights to be the one supplying the unleaded that goes into the M5’s fuel tank.