Murano do-it-yourself variator repair

Modern continuously variable transmissions are very comfortable for city driving, are unpretentious in maintenance and are quite reliable. However, their breakdowns are far from rare among cars without mechanics. Below we will consider how the repair of variators is carried out.

These units began to be used as a transmission for cars not so long ago. But for the first time such a mechanism was patented more than a hundred years ago! Its device is ingeniously simple: the cone wheels are connected by a V-belt, when the cone moves sideways, the belt rotates a new diameter each time, this also changes the gear ratio of the box.

Accordingly, these units, as a rule, fail the bearings of the cones, belts, although the latter, of course, are not rubber, the oil pump pressure relief valve. All of these problems arise from the following prerequisites:

• bad oil poured into the mechanism;
• ingress of unfiltered wear products into the bearings;
• seizure or wear of the oil pump pressure relief valve;
• poor quality of bearings;
• contamination of the additional radiator, it must be cleaned every two years!

That is, it is necessary to observe several important principles in order for the mechanism to move more than 100 thousand km.

1. Firstly, you should never delay replacing bearings, since delay can lead to breakage of the pulleys, and this is another article of repair - the cost of repairing such variators can reach up to 100 thousand rubles!
2. Secondly, it is necessary to strictly follow the manufacturer's recommendations regarding the oil to be poured and the period of its change.
3. And thirdly, clean the additional radiator located in the engine compartment in time, since the temperature regime of the variator unit is extremely important!

If, nevertheless, it comes to a breakdown, do not despair! You can try to fix everything yourself. Next, we will talk about the repair of the most typical variators from various Nissan models.

The simplest designs of these transmissions are found, say, in snowmobiles. Fixing them is straightforward. For example, it is easy to make repairs on the Alpina variator used inside snowmobiles by studying the video.

Typical automotive transmissions of this type are much more complex. This also applies to knots from Nissan. Let us first analyze how the CVT repair is carried out on the Nissan X Trail. Useful for us:

• wrenches;
• screwdrivers;
• heads with a crank;
• hammer;
• plastic clips.

We start with a viewing hole. This process can also be traced in the video on the topic "do-it-yourself variator repair".

Also read about the Ford Focus 2 front suspension repair scheme and replacement of the valve cover gasket.

This process confirms the well-known saying that the devil is not as bad as he is painted. The described technology proves that disassembling and repairing a broken car variator with your own hands does not cause excessive difficulties.

As for the Nissan Qashqai. Repair of the variator from Nissan Qashqai goes roughly in the same scenario. Consider, for example, how on this car the bearing of a tapered pulley is replaced without dismantling the gearbox.

To work, it is enough to lay out the following tools in front of you:

• wrenches;
• screwdrivers;
• heads with a crank;
• hammer.

We act like this (it is desirable to have a viewing hole).

1. First of all, we raise the front part, remove the engine protection.
2. Next, we disconnect the wheel drive.
3. Having unscrewed the boss, we drain the oil from the box.
4. After that, unscrewing the bolts, and also prying with a screwdriver, we remove the left transmission cover.The bearing of the drive shaft opens to us, which can make an unpleasant noise after 50 thousand kilometers. This noise cannot be ignored, as already noted, this malfunction can lead to damage to the drive disk. Moreover, with good noise isolation of the car, you still need to be able to distinguish this sound, similar to a uniform hum.
5. We take out the defective bearing.
6. We take out and rinse the oil pump filter.
7. Installing a clean filter.
8. We insert a new bearing.
9. We make the assembly, for which we attach everything as it was. Fill the assembly unit with oil. We are completing the installation of automotive components.

Now the unpleasant noise from the side of the box should disappear. Having done such manipulations on our own, we can save a lot, because the price for repairing the Nissan Qashqai variator in car services "bites"!

The transmission is similar in design and is installed on other Nissan. Timely replacement of the unit fluid helps prevent major and costly repairs. Using the example of other Nissan, we will analyze an important operation for changing the gearbox oil. Such an intervention should be performed approximately every 60 - 80 thousand km of run. For such a minor repair of the variator from Nissan Teana, we need:

Let's get started.

1. We raise the front end, we hang the drive axle of the car, this can be done with the help of an additional jack.
2. Having unscrewed the plug, we drain the working off, but it will not be possible to completely free the transmission from the fluid immediately.
3. We tighten the drain plug.
4. We start the car and spin the wheels for half a minute in the “drive” position.
5. Unscrew the plug again, drain the remnants of the mining.
6. Fill the unit with a new working medium through the filler hole.
7. We check the level on the dipstick.
8. We start the car - we repeat point 4.
9. We muffle, check the level on the dipstick.
10. Add oil if necessary.