Work associated with the replacement of the beltengine timing gear, crankshaft and camshaft pulleys, front engine oil seal, and the generator drive itself, require the removal of the crankshaft pulley. This element is both on domestic cars, and on foreign cars. Actually, most motorists have a question, how to unscrew the crankshaft pulley? And to be even more precise, the fixing bolt on the crankshaft flange, and in which direction to turn the key. Let's consider.
The main faults include:
In addition to the wear of the pulley working surface, slippage can also occur due to the wear of the drive belt. It changes every 60 thousand kilometers.
This question is asked by many motorists. In order not to let the thread or, worse, twist the head of the bolt, it does not prevent the driver from figuring out which way to turn off the bolt of the crankshaft pulley.
Since on the pulley and flange fixing element the thread is right-sided, it is untwisted as well as the other car nuts (counter-clockwise).
At first glance, there is nothing difficult insimply remove the bolt securing the pulley to the flange of the engine crankshaft. However, this is not quite true. The crankshaft pulley bolt is very rarely unscrewed and always boils. Therefore, there is a risk of frustrating it. First we need to get to this pulley. To do this, the generator fixing bolt is loosened to the tension bar. The latter is attached to the engine block.
The generator is shifted towards the motor, andpulleys are removed drive belt. It can be of a stream type or notched. Now, having reached the necessary element, proceed to further actions.
In the case of a mechanical switching boxgears, the crankshaft pulley bolt can be unscrewed using the spanner or head. It is better to take a conventional wrench. The ratchet in most cases does not withstand such a load (even if it is the most durable) and as a result crumbles to pieces. It is not recommended to use a carbide or gas wrench while dismantling the crankshaft pulley.
The first tool can break, and the secondonly spoil the edges of the bolt, and the next time it will be even more difficult to unscrew it. In case of severe damage to the faces, it is necessary to drill and extract it in parts, which will be unpleasant for the owner of the car. This will increase the time to replace the item.
On domestic cars of the VAZ family"Classics", as in fact on other cars, the element is extracted equally. The difference is only in what kind of gearbox is installed on the car, which produces such work. In which direction should the crankshaft pulley bolt be unscrewed? Definitely counterclockwise.
To simplify the task, you can call an assistant,which must include direct transmission (3 or 4) and keep the brake pedal depressed. At the same time, you will unscrew the bolt securing the pulley. If the car is rear-wheel drive, then you can do without an assistant. Just put the car on a handbrake and unscrew the bolt in the same way. Perform work can be from the hood or below in the observation ditch. The main thing is to make it comfortable to work. Still it is possible to subdivide the car and to remove a forward right wheel.
This will provide good direct access to the pulleyCrankshaft, which is unscrewed by a head with an extension. The bolt of the mechanism seldom "lends itself" at once and permanently sticks to the inner hole of the flange of the crankshaft. Therefore, it is always very difficult to break it. If the bolt of the pulley can not be unscrewed, a long wrench or pipe can come to the rescue. The element is put on the key. Grasping the very edge of the wristlet, collecting, as they say, all the forces in a fist, you should try to take it off again. In fact, the longer the lever, the easier it is to work.
How to unscrew the crankshaft pulley on the machine?If an automatic gearbox is installed, then the "Parking" transmission is set on the car with the rear drive. The manual brake is activated and then the element is unscrewed in the same way as on the mechanical box. Harder, if the car was front-wheel drive. In this case, remove the element as on the mechanic (with the gear engaged and the brake applied) will not work.
There is a big risk of damage to the gearbox.In this case, the crankshaft must be stopped so that it can not rotate in any other way. Insert the mounting between the teeth of the gearwheel of the engine flywheel through the hole in the transmission bell. It is pinned down so that it can not come off and damage the teeth on the flywheel. In some cases, to get to the flywheel, you need to unscrew the engine starter. This will require a viewing pit, a lift or a flyover.
There is one more tricky way to unscrewcrankshaft pulley. It is done on its own without an assistant. Preliminarily removing the generator drive belt, the head bolt or a ring wrench, the handle of which rests against any surface, is put on the bolt of the mechanism.
Keep it in the body or other parts of the engine compartmentspace is not worth it. When unscrewing the key can damage the units with rubber nipples, scratch and even damage the body. In the future it becomes clear why. It is best to rest the handle of the key in the ground or floor, putting a wooden board under it. The main thing is to have a firm and even surface. If the key does not reach to the stop, then by moving the head or rotating the crankshaft to rest it in a firm surface.
Now, having turned on the ignition, you need a starterto scroll the engine. Its strength is more than enough to disrupt the pulley locking bolt. The main thing is not to overdo it and correctly lock the key, so that it stays firmly in place and does not stagger. Even because of a small displacement, it will jump off the head of the bolt and damage the engine compartment. In no case can you start the engine, and if it does happen, immediately drown it.
To exclude starting the engine, it is possible to remove the fuel supply hose from the gasoline pump to the carburetor, if it is a carburetor engine, or the hose entering the fuel rail if the engine is injected.
Now you know how to unscrew the crankshaft pulleyyourself. The owner of the car needs to approach this work with great responsibility. Admitting the slightest mistake, you can provide additional repairs, which will be accompanied by a large cash outlay. If the head of the bolt secures the crankshaft pulley, the thread or the parts of the engine compartment will be damaged. Therefore, correctly following the above recommendations, the work will be quick and qualitative without the appearance of adverse situations. On this question, how to unscrew the bolt pulley crankshaft with your own hands, can be considered closed.
