Timing belt - what is it? Why change the timing belt?

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2019-12-04 00:20:16

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Certainly, some novice drivers do not know such a thing: timing belt - what it is, what it's for. Therefore, you should conduct a small introduction course to understand how important element in the engine it is. You should start with how it looks, where it is located, and to examine its internal structure. Well, better to finish a little guidance on replacing the belt and related items. But about all under the order.

Appearance and composition of timing belt

But it is worth considering the timing belt - what it is, what benefits it can give? Please note that it is flexible. This is one of its advantages. Appearance - small width belt, the outer part is smooth, the inside of the teeth. But hardly anyone thought about the fact that gives it such strength. After all, his life on most vehicles is about 60 thousand kilometers, which is about 2 years of operation in normal mode.

belt it

The Outer part is the base. It is smooth, able to provide reliable protection from any liquid - antifreeze, water, oil. Inside of that the teeth profile can be of three types. A simple curvilinear, or modified, as well as the trapezius. Teeth provide a secure grip with the pulleys cranked and camshafts. But the most important is inside the belt - there are strands of fiberglass. Wrapped these fibers are produced in a spiral, which allows to ensure excellent elasticity and ability to withstand the load in tension.

The Purpose of a timing belt

Now that we more or less figured out, what is the timing belt that this device represents, you can move ahead is to determine for what purpose it is needed. The current cars have a valve system driven shaft, on which are Cams. This mechanism is called “distribution”. The thing is, that it opens and closes the combustion chamber during the cycles of intake and exhaust. Therefore, during the combustion of the fuel-air mixture ensures maximum tightness of the combustion chamber.

what is the timing belt

This way you can achieve more power. Indeed, when compared with engines having no valves, it is possible to check not only increase capacity but also efficiency. Timing belt «Ford» is also made of elastic materials. Previously, the drive was only used chain but they have exactly the same resource, and noise make to order more. That's just valves in the engine may be a different number, and you need to manage all. And so they worked in time with the pistons. Some engines use two straps. The truth is, this is a very powerful and expensive cars.

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How important is it to put the label?

To understand whether it is necessary to accurately set the camshafts to the marks, just imagine how it will work the engine, if there is an imbalance. Presented? Yeah, not a very pretty situation. For example, in the first cylinder to occur should the beat fuel injection. But due to improper mounting of the intake valve is fully closed and the outlet open. Consequently, all the fuel simply does not fall into the combustion chamber and ignition does not occur in a timely manner.

marks timing belt

Then there is stroke, which ignites the mixture. She was supposed to illuminate, but its not, she stopped at the entrance and is separated by a valve. If the label timing belt was exposed correctly, the problems would not have arisen. And now a spark, but she illuminates the dark and the empty combustion chamber. During the exhaust stroke opens the inlet valve, there is a flow of some amount of fuel. Provided that it does not splash back into the rail or carb. The next cycle a small part is burned and the rest goes to the exhaust system. In such operation, the engine will never start, so it is important to accurately set the label.

How to set label?

So getting to the most important question that you need to know all the answers. What tags are and where to find them? Knowing the design of one of any of the car a snap, acting by analogy, to replace the belt on any other. If you know how to replace the timing belt "Reno", then you will not be a problem to install the new one for “nine” or even “top ten” the 16-valve. The main thing is to know where to look for the desired tag.

why change the timing belt

First, there are marks on the flywheel and the engine block. Second, to the camshaft and, more specifically, the drive gear is the label.

Now it is necessary to consider the most popular engine models. If the 8-valve, in which one camshaft. If a 16-valve two, except the tension pulley, there is another. It is not needed for adjustments, with the help of timing belt “Chevy" is held in the normal position. Significant differences in the procedure of installation of pulleys to the marks no, they only need to put against each other.

Belt Replacement

Different cars are replaced with some features. For example, on some models, "Reno", in particular, popular in our country, “Logan” shouldhang the engine as required to remove the pillow. Without this it is impossible to remove the belt and put a new one. The owners of these cars know what a timing belt, how to deal with it, so a replacement they can spend very quickly, without resorting to service stations.

what is the danger of breakage of the timing belt

But in most cases it is enough to raise the right side of the car then remove the wheel. Remove a protective casing of plastic, which covers the drive. Also remove the drive belt additional attachments - steering, generator, air conditioner, depending on the vehicle specification. Then you need to remove the pulley drive mechanisms. The crankshaft pulley that drives the timing belt, no need to remove enough to free him. Now you just loosen the tension pulley and pull the strap to remove it from the pulleys.

What happens if breakage occur?

Many are wondering about what dangerous breakage of the timing belt. In this case, you need to contact an experienced auto mechanics who know the device piston group specific to your engine model. If we take the example of domestic cars in the model range of engines 2108 there are many differences. On some, the belt breakage is painless on the other you can bend valves and even damage the cylinder head.

timing belt Renault

Note that, whether sanding on the top surfaces of the pistons. If they are present, you cannot go to costly repairs in the event of breakage. But if not, then inevitably there will be damage to the valve system. Plan for a long time to use the car? Contact Turner that will make indents on the pistons. This can really protect the engine. And the only thing you'll need in the future is to carry a spare strap to quickly replace. Of course, after the break you know what a timing belt and how to change it in the field. But bitter experience is a lesson for you, and very useful. Probably every motorist faced with a similar lesson away from home.

Replacement roller and pump

And now should talk about what most cars use the scheme to timing, which has already become a classic. The belt also rotates the pulley of the pump which is necessary for the cooling system for normal operation. Looking at the resource of the pump and belt, you can see that from the first he not much more. And the cost of this unit is not that big, so you should replace the pump simultaneously with the timing belt. Of course, the rollers always need to change, as they have the resource the same as that of the belt.

belt tensioner Ford

However, for this you will need to fully drain the engine cooling system, giving her some time to cool down, if the motor was recently plugged. In almost all models there are two drain holes in the block and at the bottom of the radiator. Again, please note that the resource of the antifreeze is not very large. Its additives evaporate, and the properties change after 60 thousand kilometers. Isn't it better to replace the antifreeze? Therefore, understanding the timing belt - what it is, you need to determine what other parts to replace when installing a new one.

What you can along the way to replace it?

Depending on what car you can change different actuators. In particular, very often the car owners, along with the timing belt change the alternator, air conditioning compressor, and power steering. This is quite reasonable, because the life is not always higher than that provided for the timing. And external influences on these belts is much longer, as they don't hide behind protective covers in most cases.

belt tensioner Chevrolet

And if timing is important to correctly set the timing belt marks for the other actuators, this condition is irrelevant. Installation is done arbitrarily. All the dust and drops of water immediately deposited on the surface of the drive belts additional equipment. Here and to crack long. Of course, if suddenly broken alternator belt or a / C compressor, the engine will not suffer, it does not need to be repaired. Will only become less comfortable or simply begins to discharge the battery.

Insights

So you figured, why change the timing belt. Now you can safely proceed to this simple fact, in advance acquainted with the particular construction of mechanism on your car. The main thing is to correctly set the marks and produce quality repairs. For example, when severe wear of the pump, the belt begins to slip, its edge rubs against the roller, gradually decreasing the width of the surface. This can cause breakage, which will easily lead to the repair of cylinder heads.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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