Saturday, January 31, 2009

Mystery in Proton Perdana V6 Maintenance

In the year 2008 after the Malaysia Genaral Election, Malaysian folk may still remember there are tussle for the candidate for Terengganu Menteri Besar, when all the issue settle, the new elected Terengganu Menteri Besar had made a decision to replace the State Assemblyman car from Proton Perdana V6 to Mecerdes Benz, the reason given is the maintenance fee for Proton Perdana V6 is far higher than Mercedes Benz.

They have been some argument on the issue until the Prime Minister had step in to stop the conflict, but after a few month later, the oposition control state, Perak, also have made a decision to change all their State Assemblyman car from Perdana V6 to the latest model of Toyota Camry, the reason is same as because of Perdana V6 maintenance fee is too high.

First of all, I would like to stress that I would not like to discuss and argue on the politician issue, all I want to give is my very own opinion on why our national car Proton Perdana V6 maintenance fee is higher than those more establish car model.

Personally, I feel Proton Perdana V6 consider a good car if it is not the best, the car have all the leading technologies component bring from Mitsubishi Motor Corporation, Japan. And the engine of 6A12 can be consider one of the most efficient engine in the Mitusbishi series of engine, so why it have the maintenance problem.

The very main reason I think is the spare parts we use on it, let see my below analysis.

Frankly speaking, if you would like to buy the Proton Perdana V6 spare parts which is made in Japan or the OEM parts from Japan, the pricing is really not cheap at all. But Perdana V6 is branded as national car, with quite a lot of numbers of this car on the road in Malaysia, the local parts seller will start to source for a more cheaper replacement parts, which it may come from China, Taiwan, Thailand, Indonesia or India.

If we use the low quality parts for this type of car, we may save in the parts cost but the maintenance issue will be snow balling bigger and bigger after this.

Let us take for example, if we use a low quality oil seal on the engine side (Camshaft oil seal, timing oil seal or flywheel oil seal), it may cause some oil leaking from the seal side and the leaking oil may contact with the belting inside (Timing belt, fan belt etc), and it may cause the timing belt break out sooner than it lifespan. when the timing belt break out during driving, it may cause jam in the engine valve and if the fatigue is big, it may need to ovehauling the engine.

As we know V6 engine contain 2 engine block that design in V shape with 3 cylinder running in each block, for a basic head set gasket, thier contain items may doulbe up than the normal gasket set, they will be 2 pcs cylinder head gaskets, 2 pcs valve cover gaskets, 2pcs of inlet manifold gaskets, 2pcs of exhaust manifold gaskets, 4 pcs of camshaft oil seals, 6 pcs of spark plug seals, 24 pcs of valve stem seals and may be 18 pcs of valve cover seals gasket if you want to include it.

The fact is, do you know that the pricing for the whole head sets which contain all the above items for the China made product, is just about enough to buy 1 pc of cylinder head gasket for this same model which is made from Japan.

So if the foremen willing to use the best parts for the car, although the parts cost may be high, but it will save a lot of maintenance cost in the future. People who using Mercedes Benz normally use the best parts for their vehicle, thats why their vehicle is less maintenence problem when compare to others vehicle that tense to use low quality parts.

Friday, January 16, 2009

Mazda Engine

Mazda has been a long-time engine innovator. The company has breathed life into the rotary and Miller-cycle engine and has proved itself able to build very finely tuned turbo engines.
Here’s how to decipher the engine codes used by Mazda...

Engine Code Engine Configuration/ Capacity
12A Twin-rotor Wankel rotary/573cc x 2
13B Twin-rotor Wankel rotary/654cc x 2
20B Triple-rotor Wankel rotary/654cc x 3
JE V6 piston engine/3.0 litre
J5 V6 piston engine/2.5 litre
KF V6 piston engine/2.0 litre
KJ-M V6 piston engine (Miller cycle)/2.2 litre
KL V6 piston engine/2.5 litre
K8 V6 piston engine/1.8 litre
B6 Four cylinder piston engine/1.6 litre
BP Four cylinder piston engine/1.8 litre
FE Four cylinder piston engine/2.0 litre
F2 Four cylinder piston engine/2.2 litre (turbo only)
F8 Four cylinder piston engine/1.8 litre

Mazda Rotary Engines...

Put into mass production in the late ‘60s, killed and then reborn in 2003, the Mazda rotary engine has a rich history of motor racing behind it. There’s simply no overstating the amount of grunt achievable with these very compact, lightweight engines.

The reborn rotary engine fitted to the new RX-8 is based on the faithful 13B twin-rotor design but it has been dramatically reengineered (primarily to achieve improved fuel economy and emissions). The exhaust ports have been relocated to the side housings of the rotor chambers, a variable induction system has been added, there’s new-generation injectors and electronic throttle control. Known as the RENESIS rotary, the RX-8 engine uses 10.0:1 compression and – without the aid of forced induction – spits out 177kW at 8200 rpm and 211Nm at 5500 rpm in the Australian-spec manual gearbox version. Australian automatic models trail by 23kW but generate more torque.

The Series 8 Mazda RX-7 was the last of the previous line-up. The Series 8 RX-7 (see Last of the Line RX-7 for our full coverage of this beast) used the long-proven 13B twin-rotor engine hung with sequential turbochargers, an air-to-air intercooler and a 9.0:1 static compression ratio. In Series 8 Type R and RS guise, the twin-turbo 13B REW cranks out 206kW at 6500 rpm and 314Nm at 5000 rpm.

Note that the twin-turbo 13B fitted to the Series 6/7 RX-7 is rated at ‘only’ 187 - 195kW, while the Eunos Cosmo’s 13B TT made just 172kW.

But for monster power – torque, at least – you’ve gotta be talking about the top-line Cosmo’s triple-rotor 20B. Essentially a 13B design with another rotor hung off the end, the 20B was only ever produced in sequential twin-turbo form – there was never an atmo version. Displacing a total of 2.0-litres, the 20B generates the Japanese regulation 206kW (and a bit!) at 6500 rpm along with 402Nm at 3500 rpm. The extra torque of the 20B made it the logical choice to fit to the top-line versions of the Japanese market Cosmo.

But don’t think twin-turbochargers are essential for real rotary performance...
The 13B rotary in single turbo form can muster up to 151kW in Series 5 RX-7 guise. Series 4 13B turbo engines – with a more restrictive intercooler, different rotors and turbocharger – make 15kW less.

Back in the early ‘80s – before the days of turbocharged 13Bs – Mazda relied on a turbocharged version of the smaller 12A rotary. The 12A turbo (Mazda's first rotary turbo) came non-intercooled, but managed to produce a maximum of 121kW at 6000 rpm in the first-generation RX-7.

The only naturally aspirated rotary that makes any real power (aside from the new RX-8 RENESIS engine) is the 13B EFI. Depending on model, this engine makes up to 121kW at 6500 revs.

Mazda Sixes...

The most creative and desirable Mazda six is the KJ-ZEM Miller-cycle supercharged engine. Displacing just 2.3-litres, this DOHC, 24-valve V6 boasts a screw-type supercharger and twin air-to-air intercoolers. And what about the Miller-cycle principle? Well, this system keeps the intake valves open for the first 20 percent of the compression stroke. The timing of the intake valves is from 2 degrees before TDC until 70 degrees after BDC, with exhaust valve duration from 47 degrees BBDC to 5 degrees ATDC. All of this reduces pumping losses and improves efficiency when teamed with the supercharger.

The maximum output for the Japanese-market KL-ZEM is up to 162kW at 5500 rpm with 294Nm at 3500 rpm. This is a very smooth engine – not surprising given its use in the top-line Eunos saloon.

The second most powerful Mazda six is also fitted to a luxury saloon – the vehicle recognised in Australia as the mid ‘90s 929. The JE-ZE is a 3.0-litre, DOHC, 24-valve V6 with a 9.5:1 compression ratio. In Japanese spec it’s rated at 151kW at 6000 rpm and 272Nm at 3500 rpm. This engine is essentially a DOHC version of the JE 3.0-litre V6 released in the early-mid ‘80s.
Another good Mazda V6 is the KL-ZE 2.5-litre DOHC, 24-valve V6. The highest output version of this engines uses 10.0:1 compression and makes 149kW at 6500 rpm and 224Nm. This engine comes fitted to vehicles such as the Japanese market Millenia 25M.

Although intended for a people mover role, the Mazda AJ-DE 3.0-litre DOHC 24-valve V6 is another worthy mention. With its 10.0:1 compression ratio, this engine generates 149kW at 6000 rpm and 265Nm at 4700 rpm in current Japanese-market Mazda Tribute form. Oddly enough, Australian delivered versions of this engine appear to generate slightly more power – the local Mazda MPV and Tribute V6 both manage to crank out 152kW and 276Nm.
Also in the Australian market, the J5-DE 2.5-litre, DOHC, 24-valve V6 (from the last MX-6) might also be of interest. This engine uses 9.0:1 compression and makes 119kW and 211Nm. Note that the local Eunos 500 uses a KF-ZE 2.0-litre V6 for 119kW/180Nm and the little 30X sportscar uses a K8-ZE 1.8-litre V6 for 108kW/157Nm. A sweet little thing.

Mazda Fours...

Without question, the most desirable Mazda four-cylinder engines are turbocharged.
Gruntiest of the lot is the BP-series turbo engine from the Japanese-market Familia (323) GTR. The BP turbo engine is a 1.8-litre four with DOHC, 16-valve breathing and – in GTR-spec – it uses a relatively large turbo, an upgrade air-to-air intercooler and various other mechanical changes. Max output is an impressive for a 1.8-litre - 154kW at 6000 rpm and 250Nm at 4500 rpm. Note that the Familia GTR was produced in only limited numbers.

The run-of-the-mill BP-series intercooled turbo engine can be found in the Australian Ford KF – KH Laser TX3 AWDs and the Japanese-market Familia GTX. Thanks largely to the high-octane Japanese fuel, the Familia GTX engine is listed with the most power of this trio – it makes 134kW at 6000 rpm and 237Nm at 3000 rpm. Interestingly, the static compression ratio for both the Familia GTX and GTR engines is 8.2:1.

Next most powerful is the 1.6-litre DOHC, 16-valve, intercooled turbo B6 engine as fitted to the Australian Ford KE Laser turbo, Capri and the Japanese-market Familia AWD and FWD turbo. As predecessor to the BP-series 1.8, the B6 shares a similar engine design and a low 7.8:1 static compression ratio to achieve up to 110kW. Australian versions are listed with 103kW (and 186Nm) when running premium-unleaded fuel.

Mazda also released a comparatively large 2.2-litre turbo engine in the late ‘80s. The F2 2.2 SOHC, 12-valve, four used an intercooler and single turbocharger to produce a maximum of 108kW at just 4300 rpm (quoted from Australian spec F2 engines running premium unleaded fuel). These engines were optional in the local 626/Telstar TX5 and MX-6.
Interestingly, the Japanese market version of the MX-6 (aka Capella) also saw the FE 2.0-litre DOHC, 16-valve engine that could generate 104kW at 6000 rpm without forced induction – almost as much as the turbocharged F2 2.2-litre! Torque, however, was down at 186Nm at 4000 rpm compared to the Australian-spec F2’s 258Nm at 3500 rpm.

In the early/mid ‘80s, a SOHC, 8-valve turbocharged 2.0-litre four – the FE-series – was introduced to the Australian 626 and Ford Telstar TX5. Using simple throttle-body type fuel injection this engine was listed at 87kW, but the Japanese version – in particular the ‘Magnum’ – are reputedly much more powerful. These early FE SOHC turbo engines were also used in the larger Mazda 929 range.

About the same time, Mazda released the E6 and E5 SOHC turbo engines that used similar technology. Power outputs were in the vicinity of 75 to 85kW.

And what about Mazda’s naturally aspirated four-cylinders, you ask?

The best is the L3-VE engine as fitted to the Japanese market Atenza. The L3-VE displaces 2.3-litres and, in Japanese guise, features a 10.0:1 compression ratio, DOHC, 16-valve breathing and variable inlet cam timing. Its output is 131kW at 6500 rpm and 215Nm at 4000 rpm. Note that the L3-series four is also used in the Australian Mazda6 and Mazda3, but outputs are only 122kW/207Nm and 115kW/203Nm respectively.

The 2003 Japanese Familia rates second with a 121kW output from its optional high-output 2.0-litre engine. The FS-ZE 2.0-litre DOHC, a 16-valve engine uses a high 10.4:1 compression ratio.
Next comes the 1.8-litre DOHC atmo BP-series engine in the Mazda MX-5 (aka Roaster and Miata). In its latest Japanese guise (BP-VE), this engine uses 10.5:1 compression, variable inlet cam timing and produces 118kW at 7000 rpm and 170Nm at 5500 rpm. Earlier 1.8 versions made closer to 100kW. Note that the Australian-spec engines are also invariably slightly down on the outputs of the Japanese examples.

The first 1.6-litre version of the MX-5 used an atmo B6 engine delivering only around 82kW. In Japan, however, the entry-level MX-5 still uses the B6 now rated at 92kW.

The Australian Developed MX-5 SP Turbo Engine

The hottest factory-backed Mazda MX-5 in the world is the Australian-market SP (Special Performance) Turbo.

Using the latest variable cam timed 1.8-litre as the base (retaining its standard compression ratio), the SP Turbo has been fitted with a nickel-alloy cast iron exhaust manifold with a ball-bearing Garrett turbocharger blowing through a front-mount air-to-air intercooler. There’s also a carbon-fibre airbox, Bosch blow-off valve, large diameter exhaust, bigger injectors, different spark plugs and an upgraded coolant radiator to round out the mechanical mods. The factory ECU has also been re-mapped to suit.

Output? An impressive 150kW at 6800 rpm and 280Nm at 4600 rpm with just 0.5 Bar of boost!

A free-spinning F8 1.8-litre DOHC four was also used in various Japanese-market vehicles - it generates 86kW at a very high 8000 rpm. But more impressive is the current model FP-DE 1.8-litre DOHC, 16-valver in the Japanese-market Premacy. It’s rated at 96kW and 161Nm – and note that the same engine (but making 92kW) is available in the late ‘90s Australian-delivered 323. The 2003 Demio can also be bought with a ZY-VE 1.5-litre DOHC, 16-valve engine making 83kW and 140Nm. Note that the Australian-delivered Mazda2 also employs the same engine making virtually the same output.

Mazda Threes...

If you’re interested in three-cylinder performance, the current Mazda K6A 660cc DOHC, 12-valve turbo engine should be on your shopping list. With an 8.4:1 static compression ratio, variable valve timing and air-to-air intercooler this baby engine puts out 47kW at 6500 rpm and 106Nm at 3500 rpm.

A naturally aspirated version with variable valve timing and 10.5:1 compression generates 40kW and 63Nm. Both engines come fitted to the Japanese market Mazda AZ Wagon Kei classer.

Mazda Performance Motors at a Glance...


20B Triple Rotor Twin Turbo 206kW
13B Twin Rotor Twin Turbo – S8 RX7 Type R and RS 206kW
13B Twin Rotor Twin Turbo – S6-onward RX-7 187 – 195kW
13B Twin Rotor Twin Turbo - Cosmo 172kW
13B Twin Rotor Turbo – S5 RX7 151kW
13B Twin Rotor Turbo – S4 RX7 136kW
12A Twin Rotor Turbo 121kW
13B Twin Rotor EFI 121kW
13B RENESIS (Australian spec) 177kW


KJ-ZEM 2.3 litre V6 Miller Cycle Supercharged 162kW
JE-ZE 3.0 litre V6 DOHC 151kW
AJ-DE 3.0-litre V6 DOHC 149/152kW
KL-ZE 2.5 litre V6 DOHC 149kW
J5-DE 2.5 DOHC 119kW
KF-ZE 2.0 DOHC 119kW
K8-ZE 1.8 DOHC 108kW


BP 1.8 DOHC turbo (Familia GT-R) 154kW
BP-VE 1.8 DOHC SP turbo (Australian spec) 150kW
BP 1.8 DOHC turbo 134kW
L3-VE 2.3 DOHC 131kW
FS-ZE 2.0 DOHC 121kW
BP-VE 1.8 DOHC 118kW
B6 1.6 DOHC turbo 103/110kW
F2 2.2 SOHC turbo 108kW
FE 2.0 DOHC 104kW
FP-DE 1.8-litre DOHC 96kW
B6 1.6 DOHC 82 – 92kW
FE SOHC turbo 87kW
F8 1.8 litre DOHC 86kW
ZY-VE 1.5-litre DOHC 83kW

E5 1.5 SOHC turbo/E6 1.6 SOHC turbo 75 - 85kW


K6A 660cc DOHC Turbo 47kW
K6A 660cc DOHC VVT 40kW

Saturday, January 3, 2009

Nissan VQ series V6 engine

In Malaysia, Nissan VQ series engine start to make their debut in the model of Cefiro V6 with VQ20DE for 2,000cc model and VQ30DE for 3,000cc model.
But there are some parts importer in Malaysia had bring in the VQ25DE engine and modified it on the Nissan car type for those who love to enjoy the speed and powerful of car.
The problem start when the VQ25DE engine type wish to change their engine gasket locally, although the valve cover gasket, valve stem seal, exhaust and inlet manifold, is the same item with VQ20DE and VQ30DE, but it is not for their Cylinder Head Gasket. VQ20DE Cylinder Head Gasket bore diameter is to small for VQ25DE and VQ30DE is too big for it. It is really hard to source for the Cylinder Head Gasket.
At last, Nissan had launch Nissan Teana in Malaysia in the year of 2008, with the Engine Model of VQ23DE with 2,300cc V6 Engine. May be many people do not notice that VQ23DE is sharing the same size of Cylinder Head Gasket for VQ25DE, hence we may see the VQ25DE lover have a better chance to source for their Cylinder Head Gasket.
The VQ series already reach to 3,500cc with the VQ35DE model for the Nissan Murano 3.5l in Malaysia, and we may look forward for the more powerful VQ37VHR engine in future in Malaysia, which this type of engine already available in Japan for their Nissan Skyline Coupe.