How to put rings on a piston: the technological process of installing and replacing rings

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:41

If the car's dynamic performance has deteriorated sharply, oil and fuel consumption has increased, problems with starting have appeared, then this indicates engine wear. But this is not yet a verdict. These symptoms indicate that the rings need to be replaced. Let's see how to put the rings on the piston. The procedure is not difficult, but requires the presence of a tool and care.

What do you need to replace?

For such a procedure, it is worth preparing a set of wrenches, a ratchet with socket heads, a torque wrench, a piston ring remover and a ring set itself.

The Piston Ring Mounting/Dismounting Tool features simple structure and reasonable price. Without this device, the replacement process can turn into an almost impossible task. Of course, before motorists managed with a couple of screwdrivers. But it is better that there is such a tool, otherwise, without it, you can damage the rings or the surfacepiston. Moreover, it is always available in car dealerships.

Features of choosing rings

In order for the engine to work reliably after repair, it is important to choose the right rings. Don't buy the cheapest set. Such rings will not last long, and you will have to go through the laborious replacement process again.

It is also important to inspect the packaging and the parts themselves. The packaging should contain all information about the manufacturer, the material of manufacture. Rings should be marked. It represents the top side. Manufacturers usually put instructions inside the package, which details how to properly put rings on the piston. The latter should not have defects, even the smallest ones.

How to change rings?

From this instruction you can learn how to put rings on the piston of VAZ and other cars, including foreign cars. To replace, dismantle the oil pan. Then the connecting rod caps are unscrewed, the connecting rods are pushed out. Remove the rings with a special tool.

It is important to remove carbon deposits from the grooves - you need to clean them down to the metal. Uncleaned soot will interfere with the installation of new rings in the seats. It is convenient to clean the piston with a piece of old part. To speed up the process of removing carbon deposits, you can soak the piston in dimexide or any other cleaning fluid.

Now we need to consider how to put the rings on the piston. This requires care and precision. The rings are very fragile, and the most fragile among them is the middle one. During the installation process, the part is very easy to break. When installingit is important to correctly orient the rings, otherwise there will be no positive result from such a replacement, and even vice versa - the driver will face even greater oil consumption.

First of all, install the top rings. They are labeled "TOP". With this marking, the element must face the piston crown. The part is installed with the scraper down. Chamfered rings are mounted so that they look upwards.

If the parts are type-setting, oil scraper with a two-functional spring expander, then the upper and middle ones are installed first.

There is another order for installing rings on the piston. In this case, the oil scraper is installed first. First mount the second, then the first. After that, a compression is installed. The second compression ring and oil scraper parts should be installed very carefully. They are very fragile and do not tolerate excessive expansion.

Then it is important to follow the locks of the rings. They should be at an angle of 120 degrees to each other. If they converge, there will be oil consumption and smoke from the crankcase ventilation system.

Replacement on motorcycles

On scooters and mopeds, this is a common procedure that is performed about once or twice a season. Rings in such engines are consumables. Even if the engine is Japanese, the elements of the piston group in it are Taiwanese at best, and most are Chinese.

In Japan, after a breakdown, it is customary to get rid of equipment - it is cheaper and easier to purchase a new scooter. There, a serious breakdown is considered a drop in compression due to wear of the rings.and pistons. In fact, the repair comes down to replacing parts of the piston group. Let's look at how to put rings on a scooter piston.

Four-stroke scooter engines

So, there is a set of rings, and the owner does not know what to do with them. There are five rings in the set - two thin ones, one oil scraper, and two compression rings. There are three grooves on the scooter piston.

Having lubricated the piston with oil, very carefully put a thin ring into the lower groove. They put an oil scraper on it. Then thin again. Three rings must be installed in one groove. The oil scraper should be between two thin ones.

After that, the compression rings are put on. They must be installed in the upper grooves. It is not recommended to use any third-party tool for installation. It should be remembered that the rings are very fragile and break easily. If the compression parts are different, then one is usually rounded, and the second is in the shape of a trapezoid. The rounded one is placed in the upper groove, and the trapezoidal one is lower. The bevel should expand from top to bottom. The ring should be wider at the bottom of the groove than at the top.

Locks are not stacked on top of each other. They should be at an angle of 120 degrees to each other. Here's how to put rings on a moped piston. As you can see, there is nothing complicated here.

Mopeds “Alfa”

This technique is very popular in Russia. When should rings and pistons be replaced? This work is carried out with a decrease in compression to 450 kPa. It can alsomeasure with a compression gauge. Also, the release will inform about the need for replacement: if there is smoke in the gas, then the rings need to be changed. They are changed on such mopeds every 10-12 thousand kilometers.

Before mounting the parts, you need to manually fit them into the groove in the piston. They are sawn with a needle file and treated with sandpaper. Then it is worth measuring the gap in the lock of the ring, which is inserted without distortions into the cylinder. The normal setting for new compression parts is 0.04–0.08 mm. The ideal clearance for oil scrapers is 0.025–0.065 mm.

If compression parts are being replaced, then they are changed to non-chrome ones. Experts tell you how to put rings on the Alpha piston: a ring correctly fitted to the piston sits in a groove under its own weight. If it does not go, then you can press down a little by hand.

In closing

Replacing the rings will help restore engine compression and sometimes reduce oil consumption. But it doesn't always help. If the cylinder is worn out and an ellipse is present, then the new elements will take a long time to rub against the cylinder. This will be accompanied by oil consumption, blue exhaust, smoke from the crankcase ventilation system. But if there is still a factory hone on the cylinder, and measurements show that the wear is small, then you can safely repair the piston. How to put rings on the piston, we examined in the article.