Crankshaft bearing: functions, replacement, price
Content
The crankshaft bearing allows the crankshaft to rotate, play turning on your engine. There are bearings on the crankshaft of cars as well as motorcycles or scooters. A ball bearing is subject to many stresses, but will last you the life of your vehicle.
⚙️ What is a crankshaft bearing?
Le crankshaft it is one of the most important parts of your engine. It is a rotating piece of metal. Its rotation allows convert linear motion to circular motion thanks to the connecting rod and piston system.
Thus, the crankshaft can drive parts such as the clutch or the damper pulley for the alternator belt. It is synchronized with the camshaft and injection pump using a timing belt.
Mechanical rotation of the crankshaft is allowed bearings... It consists of a linear axis around which it rotates with plain bearings и ball bearings. Plain bearings are metal parts in the form of an arc of a circle along which the crankshaft slides during rotation.
The role of the crankshaft bearing is to allow it to rotate about its axis. Bearings can be found in many locations, including outside your engine! It consists of two rings, between which are lubricated balls, located on the so-called track.
Therefore, all crankshafts have bearings: a car, of course, but also a motorcycle, scooter, etc.
⚠️ How do you know if the crankshaft bearings are dead?
The crankshaft bearings play a supporting role and allow it to function normally, since it is thanks to them that it can rotate. But they also allow reduce friction between the crankshaft and the engine block, which is stationary and does not rotate.
This means that the crankshaft bearings can wear and fail. They usually should, of course, last for the life of your engine, but they come under heavy strain, especially if they are poorly lubricated.
HS Crankshaft Bearing Symptoms:
- Engine overheating ;
- Abnormal engine noise ;
- Oil loss ou engine oil sight glass burns on dashboard ;
- Noise on Transmission and premature wear belts ;
- Metal filings and residues inbutter.
A dead crankshaft bearing is bound to make noise on both the motorcycle and the car. It is a growl with vibrations.
🔨 How to remove the crankshaft bearing?
Disassembly of the crankshaft bearing is usually done on a motorcycle or scooter. Then you must use a crankshaft bearing removal tool called extractor... This is also called pulling out the crankshaft bearing.
To remove a crankshaft bearing without a puller or puller, place a bushing or punch against the outer ring and hit it with a hammer. Never hit the bearing directly and avoid using a soft metal hammer, which can leave debris in the bearing.
👨🔧 How to install the crankshaft bearings?
If you are a motorist, you do not need to install the crankshaft bearings. In the case of an HS bearing, you will replace the entire crankshaft. Crankshaft bearing installation applies to bikers and scooter or go-kart owners.
To install the crankshaft bearing you will need:
- Put the crankshaft in the freezer for half a day. ;
- Place the bearings in a 150 ° oven for about twenty minutes. ;
- Apply some oil to hot bearings. ;
- Place the bearings while still hot on the crankshaft. ;
- Assemble the crankshaft itself..
All these operations must be performed with hot parts, including the crankcase. So be careful not to burn yourself!
🔧 How to change the crankshaft bearing?
A car's crankshaft and its bearings do not usually need to be replaced during the life of the car. Therefore, replacing the crankshaft or bearing is a very rare intervention, usually due to a malfunction. belt break.
However, it happens that bikers change the crankshaft, in particular, to improve the performance of their car or its bearings. Then it is necessary to remove the bearings using a special puller and then reassemble the new hot bearings.
💰 How much does it cost to replace a crankshaft bearing?
On a car, replacing a crankshaft is very expensive. Indeed, the operation requires removal and, therefore, the replacement of the distribution, an intervention that is already worth 600 € average... The crankshaft price isabout 400 € but highly depends on your car model. Consequently, it can cost significantly more.
Cost of replacing motorcycle crankshaft bearing between 400 and 500 €... The part itself is inexpensive, since the ball bearing has been found. from 15 € O. It is nevertheless necessary to add tariffs for labor, because dismantling is long.
Now you know everything about the crankshaft bearing. This small part ensures the correct functioning of the crankshaft, which in itself is important for your engine. It is important to make sure it is properly lubricated to avoid breakage. In the event of a breakdown, call a specialist as soon as possible.
