<D> All about Gauge Meter: Water temp, Oil temp, etc

[newcomer]

I'm sorry what picture was I refering to?

[GuiNNeSS]

I'm sorry what picture was I refering to?

 

i tot u r refering to the picture that MS posted?

[MS]

That's some food for thought. Thank you for sharing bro. Mind if I ask what training do you give?

 

Regarding the tensioner chain slack; why is the chain/belt routed in such a "snaky" pattern? Does it serve a function?

 

And just curious, how different would you modify?

 

No problems. Although I can share with you the facts, I still have to respect the fact that it is ultimately your money. And you have all the right to decide what to buy whereby I cannot stop you no matter how reasonable or unreasonable I may be.

 

I'm from the parts manufacturer side for the arftermarket. I conduct technical training for some automotive products for workshops and wholesalers in the region. Depending what is the targeted audience. I cannot reveal what products. I know there're some experienced personnel in this very forum who will be able to tell where am I working the moment I reveal the products.

 

The pattern of the timing belt or chain is dependant on the development team of the engine. So I cannot answer based on the diagram of a VAG engine.

 

When I modify, it will have to depend what type of vehicle. But I can share that my bottomline is to get the correct part number designated for my machine.

 

For example... There was one overseas customer who came to me "Porsche 2L turbo 1975. I want the clutch." This is a very bleak statement which most retail customers use. Instead, I will first search for the part number from this programme called the Tec-Doc (fellow competitors will know whats this) and look for available parts in the market before embarking on any modifications. Plan before acting. I seen quite a lot of people make modifications which veer off from the safety envelop determined by the vehicle builder. Eg. Changing the size of rims without getting the correct camber angle, changing the spark plug into iridium without checking if the part number matches, changing the shock absorber without checking if the shock absorber part number states it's for your machine, lowering the car without doing wheel alignment, changing the brake calipers without considering brake balance for front vs rear, upgrading the engine performance without checking if the powertrain (Clutch for manual or semi manual ie DSG, Selespeed or torque converter for planetary gearboxes) can match the delivery. Or even check if the gearbox can deal with it. Or worse still... if there is such a powertrain or gearbox capable of dealing with the new found power and torque. Eventually end up with a powerful engine but cannot be used as there is no suitable transmission or powertrain who can deliver the power without losing it due to limited mechanical and fluid efficiency and the list goes on. Not only cars. Even buses, trucks... you name it I'd probably have come across.

 

Therefore if you are talking about proper modifications, I personally feel that continental makes have a better usable and accounted for range of modification products. Well... of course I can be wrong too.

[newcomer]

Very englightening indeed. Well, any power modifications accelerate wear and tear no doubt.

 

Back on the topic of the pattern of the timing belt/chain, some of the reasons I can assume could be to relieve the stress of the convex surface of the belt since it's constantly stretching around the radius of the belt(Imagine sheet metal coil being straightened on a series of undulating rollers), or for optimum meshing of the belt and gear teeth.

[MS]

Very englightening indeed. Well, any power modifications accelerate wear and tear no doubt.

 

Back on the topic of the pattern of the timing belt/chain, some of the reasons I can assume could be to relieve the stress of the convex surface of the belt since it's constantly stretching around the radius of the belt(Imagine sheet metal coil being straightened on a series of undulating rollers), or for optimum meshing of the belt and gear teeth.

 

HAHA I do know that the belts need to require a certain tension on the engine in order to link the camshafts to the crankshaft adequately. With an augmentation or diminishing of tangent angle on the rollers, the belt achieve different tensions at the same time wriggle across different components obstructing it's way.

But I cannot comment on all the engines. Let the developers determine it is better. Because if you see more engines, you will realise that there are actually 3 types of timing governors. The belt, chain and cam gears. And each of them work differently with different requirements. Only the developers know best.

[newcomer]

found this interesting read on wiki

 

Serpentine belt

From Wikipedia, the free encyclopedia

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Serpentine belt on belt tensioner.A serpentine belt is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, A/C compressor, air pump, etc. The belt may also be guided by an idle pulley and/or belt tensioner. The serpentine belt was invented by Jim Vance while working for the Gates Rubber Company and first used by Ford Motor Company for the 1979 Mustang.

 

It is more efficient than the older multiple belt system. By using a single, wider belt instead of multiple, thinner belts, the belt may be put under increased tension without stretching. Higher tension reduces slip, which increases belt life and mechanical efficiency. Reduced slip can allow the use of lower-ratio pulleys; this reduces the load on the engine, increasing gas mileage and available power. Additionally, it is easier for the driver to know when the belt has broken, since this will cause the steering resistance to suddenly increase on vehicles equipped with hydraulic power steering.[citation needed] With multiple belt systems, if a single belt breaks, such as the alternator belt, the driver may not realize that there is a problem before the engine becomes damaged.

 

A serpentine belt also is much easier to maintain and replace, since there is no need to remove multiple belts in order to replace one of them.

 

The drawback of this single belt is that if the belt breaks, the vehicle loses all peripheral devices. Some vehicles use two serpentine belts for their system, such as the 95–99 DOHC Nissan Maxima and many BMWs.

 

Retrieved from "http://en.wikipedia.org/wiki/Serpentine_belt"

 

http://upload.wikimedia.org/wikipedia/commons/9/98/Tensioner.jpg