Omentums of cam-shafts VAZ and their replacement

The camshaft is an integral part of the timing system. This mechanism performs the function of closing and opening the intake and exhaust valves. From its state directly depends engine work. The cams of the camshaft are constantly in operation. In order to eliminate wear, they require lubrication. To ensure that it does not go away, the engine design uses camshaft seals. In today's article, we'll talk about how to determine their malfunction and how to make a replacement using the example of VAZ cars.

Where is?

The camshaft seal is located behind its pulley. You can see it when removing the pulley. Usually the element is painted in a dark orange color. It is made of oil resistant rubber. Soft to the touch. It is installed on one side of the shaft.

When is it necessary to change?

The manufacturer does not regulate the replacement of this element. Seals camshafts can serve as 10, and 100 thousand kilometers. Therefore, periodically check its status visually. The main sign that the car needs replacing the camshaft oil seals is the oil stains on it. Less often, deformations and tears occur. But in any case, such an element must be changed. The oil seals of the camshafts are consumables, therefore they can not be repaired. The cost of a new product is about 100-150 rubles.

Why do the camshaft oil seals leak?

This happens for several reasons. The first is contamination in the ventilation system of crankcase gases. The second reason is the clamping of the nozzles in this system, or the failure of the bypass valve. To extend the life of the stuffing box, periodic cleaning of the crankcase ventilation system is required .

If a malfunction is detected, do not postpone the replacement "for later". The camshaft seal will leak, which is the cause of the oil leaving the engine. All the lubricant will fall on the outside of the motor and other attachments, splashing the contacts and sensors. Particularly harmful oil for rubber parts. Therefore, it is so important to keep cleanliness in the engine compartment.

Replacement of an epiploon of a cam-shaft VAZ 2101-2107

First, let's look at how to change this element on the classic VAZ models. So, first remove the timing pulley. To do this, you need to dismantle the chain and the belt of the generator. The latter is fixed to the adjusting bar. We loosen the nut and drop the belt from the generator. Next, proceed to dismantling the timing chain. We remove the valve cover of the head of the block, having preliminary disconnected a branch pipe of ventilation картера. The metal casing of the air filter is pushed aside. To remove the cover of the unit, it will also be necessary to detach the fuel supply hose to the carburettor. Then unscrew the nuts and remove the lid. On the classic models of VAZ it is fixed on six bolts.

Pay attention to the camshaft pulley. There are labels on it. That there were no problems at installation of an element, they need to be combined among themselves. Next, remove the chain tensioner (it is attached to two nuts). When the chain has loosened, remove it from the pulley shaft. Next, remove the pulley itself. This can be done with two minus screwdrivers, having previously removed the cotter pin. Seals of camshafts can also be "knocked" with a screwdriver when removed.

Let's move on to installation

So, the old element is removed. Now you can start installing a new one. At the same time, the oil seal must be treated with engine oil. It is best to touch both sides of the worn element to ensure lubrication throughout the perimeter. Next, install the part in place and proceed to assemble the timing assembly. To do this, mount the camshaft pulley and chain. Do not forget about the tensioner. Install the valve cover. The important point - the lid is installed on a new gasket. Before installation, it is required to scrape off the remains of the old from all edges. In addition, the gasket is treated with a silicone red sealant. Bolts are twisted evenly, in several stages according to the scheme "from the center along the edges".

Then replacing the camshaft oil seal is accompanied by the installation of a gas vent, a fuel hose and an air filter housing. After that, proceed to install the generator belt. How much of it to tighten? Make sure that the deflection of the belt does not exceed one centimeter when pressed hard.

How to replace the new VAZ camshaft seal?

Now consider how this procedure is performed on more modern, front-wheel-drive VAZ cars with a transverse engine arrangement. So, open the hood and set the piston to the TDC position. This is necessary in order to maintain the timing labels of the timing.
Modern VAZs use a belt as a drive for the timing, not a chain, as in the "classic". It's a little easier to shoot. Plus, everything else does not need to unscrew the valve cover and all attachments (filter housing and so on). So, loosen the tensioner and throw it off the pulley. After this, we can unscrew the pulley itself.

It must be ensured that the shaft key is firmly seated in the installation site. Then use a screwdriver to remove the leaking oil seal.

Before installing a new element, carefully inspect the lip of the stuffing box and the sealing spring (attention - possible marriage). The surface of the edge must be flat. As for the spring, it should not be stretched. If all is well, install a new oil seal in place, pre-lubricated with oil. Next, using the mandrel press it until it stops. After that, we collect all the equipment in place. We start the engine and check the tightness of the seal.

Conclusion

So, in this article we have found out how to replace the camshaft oil seal on VAZ cars of different models. As you can see, the procedure does not require special tools and does not take much time. In addition to distributing, the engine also has a crankshaft. It is also equipped with seals (and on both sides). Therefore, it is important to monitor their condition. Just like in our case, the main sign of replacement is the leak. But due to the larger diameter, these oil seals will "sweat" much more.