07/17/2021 9,695 VAZ 21099
Author: Ivan Baranov
The timing belt plays an important role, so its condition must be monitored and replaced in time if defects are found. The article describes how to replace the timing belt on a VAZ 21099 injector: the video and step-by-step instructions will be useful for both experienced and novice drivers.
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About the VAZ 21099 car
The VAZ 21099 (Sputnik or Samara Forma) was the latest model of the plant of the well-known “ninth” Samara family. It was a nine that had been produced for a long time, only with a removed luggage compartment. Because of this, its length increased by 200 mm. In addition, the radiator grille, front fenders, and hood received changes. The dashboard, which drivers called “high,” received a tachometer. Before the plant began production of the tenth VAZ family, it remained the most popular domestic car for that time.
The VAZ 21099 car was equipped with an 8-valve power unit with a displacement of 1500 cm3, but some of them could have engines with a displacement of 1300 cm3. At first, the power system was with a carburetor, and later the plant switched to an injector. The timing mechanism drive for both types of engines was belt driven. The design of the 1.5-liter engine pistons was such that the possibility of the piston meeting the valves after belt damage was virtually eliminated. The use of such a drive scheme made it possible to reduce the weight of the engine.
This innovation simplified the replacement of a VAZ 21099 with an injector and a toothed belt carburetor. For correct installation of valve timing, special timing marks are provided on the rear bracket for plastic protection of the timing drive, as well as on the cylinder block in the area of the pulley on the engine crankshaft.
The gas distribution mechanism is designed in such a way that the valve stem is acted upon by the camshaft cam; there are no valve drive levers in this arrangement. The thermal gap is set on a cold engine by installing adjusting washers, which are selected to the required thickness.
The design of the timing mechanism drive for cars with an injector does not differ from cars with a carburetor in the power system.
Particular attention to the condition of the timing mechanism parts should be paid to engines with a displacement of 1300 cm3. If the belt breaks in such an engine, the valves meet the pistons, which will cause an expensive overhaul of the power unit. Check the condition of the mechanism parts more often. Rotate the pulleys and inspect the condition of the belt teeth. This will avoid negative consequences during operation of the machine.
Belt wear
It is almost impossible to break the timing belt in Samara. Most often, the teeth of the drive belt are cut off. There may be several reasons for this:
- the timing belt has expired;
- the timing drive tension is incorrectly adjusted;
- jamming of the coolant supply pump;
- engine oil getting into the working area of the drive belt.
The last circumstance is the most undesirable of the above, since the ingress of engine oil can lead to problems in the timing drive earlier than recommended by the vehicle manufacturer. The pump is replaced simultaneously with the timing belt, this will avoid unexpected engine repairs. And also correctly adjust the drive tension with the tension roller; even a novice driver can easily do this.
How to remove the timing belt on a VAZ 2109.
First of all, we engage fifth gear (this is done to make it easier to crank the engine when we align the marks), loosen the nuts on the front left wheel and jack it up. Open the hood, remove the protective cover and look at the position of the mark on the gear.
If you change the belt on a VAZ before it breaks.
Rotate the wheel until the marks on the gear and on the plate match.
After the marks coincide in this place, open the inspection hole plug in the clutch housing and check whether the slot on the housing coincides with the mark on the flywheel.
If there are no marks on the flywheel, then rotate the wheel so that the camshaft gear makes one more revolution. If this time no risk appears near the mark in the clutch housing, read how to change the timing belt on a VAZ 2109 if the belt breaks. If the mark coincides with the mark, unscrew the crankshaft bolt and go to the section “Lower timing mark of VAZ 2109”
If the timing belt on the VAZ 2109 is broken and you are planning to change it.
We remove the wheel, remove the plastic fender liner, if you have one. Unscrew the crankshaft pulley bolt.
If you don’t know how to unscrew the VAZ crankshaft bolt, then I’ll tell you a little trick.
If you have someone to help you, then ask the assistant, without removing the car from fifth gear, to press the brake as hard as possible. Meanwhile, we take the head and the larger lever and twist it counterclockwise with all our might.
If you are alone in this difficult situation, then the steps are as follows: check that the car is in gear and screw in 2 bolts that screw the wheels into the hub and between them insert a crowbar, reinforcement, a strong stick (whatever you find, as long as it doesn’t break) and press it into the ground. Next, take the head, extension and larger lever and unscrew the bolt, making sure that the car does not fall off the jack.
Lower timing mark of VAZ 2109.
After unscrewing the bolt securing the generator drive pulley, look at the alignment of the marks on the crankshaft gear and on the oil pump housing, they should match.
Video “Replacing the timing belt on a VAZ 21099”
In this video you can clearly see the entire process of replacing the timing belt on a VAZ 21099.
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Installing a new timing belt
We check that all marks match.
We first place the belt on the crankshaft and pump. Then we tighten the right descending branch of the belt and put it on the camshaft pulley and tension roller. We check all the marks again and tighten the belt with a roller. The tension is considered sufficient if, with the force of two fingers, you can twist the longest branch of the belt by a maximum of 90 degrees. It’s easier to take the right branch of the belt with two fingers and twist it, if more than 90 is not very bad, but less is very bad. An overtightened belt will wear out quickly and will also reduce the life of the pump.
We place the bottom protective plastic cover. And on the crankshaft pulley we mark the twentieth tooth after skipping two teeth. We count counterclockwise.
This mark corresponds to the top dead center of the first cylinder. We put the pulley in place and the mark should be against the crankshaft position sensor. More precisely, against the small iron core of the sensor. Sometimes it gets into the gap between the teeth, this is considered acceptable. We tighten the pulley in the same way as we unscrewed it, with the help of a partner.
We turn the crankshaft two turns and check the marks; this is where our mark on the pulley comes in handy.
If everything is in trouble, we collect everything that we took apart. As they say in smart books, install the parts in the reverse order of removal. Don't forget to add antifreeze.
We start the car, accept congratulations from family and friends and head off to adventure.
Final installation
It's time to install a new belt.
- First we pass it under the crankshaft gear.
- Then we put the timing belt on the camshaft gear.
- Then we touch it by the toothed pulley of the water pump and pass it to the right of the roller.
- We fasten the crankshaft pulley.
- We put on the generator belt and tighten it.
- Tighten the roller nut, thereby adjusting the tension of the timing belt.
It is important not to turn the camshaft and crankshaft until the belt is installed. There is a special key to tighten the roller. If you don't have one, you can insert 2 screws of the appropriate diameter into the small holes on the face of the roller and use a screwdriver to secure it while tightening.
The correct belt tension can be determined by trying to rotate it 90 degrees on the side opposite the pump pulley. If after applying some force it turns, then everything is correct. If it does not turn or turns more than 90 degrees, then the tension needs to be adjusted again.
Now all that remains is to turn the crankshaft by its pulley several times to make sure that all the marks match. And if this is the case, then screw the side shield, protective cover and wheel into their proper places. And if the marks do not match, you need to remove the belt and adjust everything again.
This completes the replacement of the timing belt on the VAZ 21099.
Replacing the pump
Unscrew the nut on the tension roller 17 and remove it along with the belt. Then unscrew the camshaft pulley bolt and remove the last one.
We unscrew everything that secures the protective metal shield, namely one ten-point nut and a bolt securing the cover, three bolts securing the pump.
Remove the protective cover and pump. Antifreeze remaining in the block may leak out if you have not drained it. Carefully, it's sweet.
We clean all the parts from oil and belt residues, as well as the pump seat from the old gasket and sealant.
Lubricate the gasket of the new pump with sealant and put it in place. We install the metal protection and tighten all the bolts and nuts securing it.
We tighten the pump bolts evenly in a circle, then check whether the pump is spinning.
Recently a client brought in an original pump, which turned out to have slightly larger petals and after installation it began to bite. I had to modify it with a grinder and take measurements several times. These are the spare parts we have.
How long does it take to replace the belt in VAZ 2108 and - 09 models?
When replacing the timing belt, try to follow the manufacturer's recommendations, but also remember that wear occurs on the gears. As a rule, replacement is carried out after 35 or 40 thousand kilometers. Some experts even recommend replacing earlier, due to the quality of the parts. But personally, I think the best option is to replace this belt after 25 or 30 thousand km, because the consumption at such a mileage cannot be called high.
- Try to clean the engine itself of oil, dirt and dust (in general, such cleaning is good for the engine).
- Then remove the protection cover that hides the belt itself in the drive.
Removing the timing belt protection cover
- Using various methods (using a wheel lift in fourth gear, using a gear bolt in the camshaft, or another method), try to connect the marks on the camshaft housing and its gear so that they are equal to TDC of the first cylinder.
Alignment of marks on the RV pulley
- Then you unscrew the bolt for securing the pulley in the crankshaft, having first secured the shaft using a screwdriver. Be sure to ensure that the shaft does not move.
How to unscrew the crankshaft pulley
- Removing the pulley in the crankshaft
We remove the pulley in the crankshaft in the VAZ 2109 and 08 models
- Then you need to loosen the belt tension. To do this, loosen the nut securing the tension roller.
The process of loosening the tension roller in these car models
- Then remove the belt itself
The process of removing the belt in VAZ models
- Then you do everything in reverse order. Make sure that there is no displacement of the crankshaft, and then put the timing belt on the crankshaft pulley.
Installing the water pump and tension pulley
The manufacturer recommends replacing the timing belt along with the pump and tension pulley. In addition, in case of severe wear, the camshaft gear should also be replaced.
In order to replace the pump, you need to perform the following operations.
- Drain the coolant into a container.
- Unscrew the camshaft gear, holding it from turning with a screwdriver inserted into the hole of the gear and pressed against the nut securing the rear cover.
- Remove the gear.
- Unscrew the nut and 4 bolts securing the rear cover and move it to the side.
- Remove the old pump by pulling on the toothed pulley with a screwdriver.
- Install the new part along with the gasket.
- Reassemble everything in reverse order.
- Fill with antifreeze.
Belt installation
If the marks on the camshaft and crankshaft coincide, you need to install a new timing belt. If there are markings or inscriptions on the belt, they must be oriented clockwise, and the arrows must also be oriented if they are on the belt. Before this, the old belt is removed; if it is intact, by examining it, you can make sure that it is cracked and its operation is dangerous.
First, the belt is installed on the crankshaft gear, and then, with light force, on the camshaft sprocket. When installed, it should go around the drive sprocket and tension roller, making a zigzag.
Checking the timing belt tension is done by adjusting the tension roller, which is best replaced when installing a new belt. This is done with a special key; if you don’t have one, bolts or pins 40-50 mm long that fit the diameter are inserted into the holes. A screwdriver is inserted between them and, turning the roller, the belt is tightened. It should be quite tight, but with the average effort of the hand to turn 90°, if it is overtightened, it will quickly wear out. After this, the tension roller nut is securely tightened.
Replacing the timing belt on a VAZ 2109
As mentioned above, the timing belt has a limited service life. On some machines the declared service life of the original product may be longer, on others less. In the case of a VAZ, the belt runs, on average, about 50-60 thousand km. or 4-5 years.
It is important to remember that it may become unusable earlier for a number of reasons (ingress of oil or technical fluids, stretching, delamination, cracking, etc.). One way or another, you need to change the VAZ 2109 timing belt both in terms of mileage or time, and in case of defects.
At the same time, it is a mistake to believe that the part has a long service life. Simply put, this is a consumable that needs to be changed regularly. Let's look at how the replacement is performed and what to pay attention to.
What is a belt?
This is a belt made of multilayer rubber with teeth on one surface, a connecting link when the camshaft and crankshaft work together, and is also necessary for the operation of the oil and water pumps.
Its multifunctionality leads to a high wear rate. The concern that produces the VAZ 21099 prefers to replace this consumable with a new one at a mileage interval of approximately 60 thousand kilometers.
But this recommendation for installing a new one, in the best case, it is advisable to check the timing belt for cracks and broken teeth once every 15 thousand km, this will allow you to avoid rupture and unpleasant surprises in the form of engine repair. You will be lucky if the belt breaks while driving, then you will need to change two or three valves, but if the car was running at full throttle, then you cannot avoid large expenses.
