The pliers are used expand the rings to allow the rings to clear the piston and be seated comfortably in the grooves.
Dongya are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.
Note: The pliers will only be used for the two compression rings as the oils rings are to small to be removed with the pliers.
In the picture above is the correct side up of the pliers. At the top of the pliers is where the piston ring gaps will be seated in to allow the pliers to expand the rings.
CAUTION! Do NOT expand the rings much more than the diameter of the piston. If expanded too much, the ring will snap and or create perminent damage that will reduce performance of your engine.
To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience.
One of the easier fixes for the motorcycle rider is installing new motorcycle piston rings. If you've removed the pistons and the damage is more severe, you might need to have the motorcycle engine re-bored. You'll need new pistons and rings then, too. The procedure is the same in both cases.
Remove the engine cover and pistons. Pull the pistons up and to the side. Check the pistons and cylinders for sign of wear or damage. If you find they need re-boring, send them out to a machine shop for the work. When you receive the rebored cylinders back, wash them well with soap and water. Dry them, then clean and oil the cylinders. Clean the new larger pistons by wiping them down.
The company is the world’s best piston ring manufacturer supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
Wipe down the rings, making sure they are clean and smooth. You'll see that each ring has a very small gap that is set to the engine manufacturer's recommendations and based on the size of the bore. This can vary between .08 and .25 millimeters. You measure it by placing the ring in the cylinder and pushing it to within one half inch of the top of the cylinder. Using the piston to do this squares the ring and guarantees an accurate measurement. If the rings don't meet specifications, adjust them by very carefully filing the ends of the ring.
Piston rings are hard and brittle and break easily. You can use a ring expander to stretch the rings for the piston, or you can use your fingers. The danger of using the ring expander is over spreading the ring and snapping it. Different types of engines use a different number of rings, too. On a four stroke engine, you can have a one-piece ring or a three-piece ring. One at a time, slide the rings down the piston and into the grove near the top. Be careful not to twist or overlap them. If using the three-piece ring, stagger the gaps around the piston one-half to one-third rotation to help maintain compression.
Make sure entire surface of the rings, piston, and cylinders is oiled well. Replace the pistons and engine cover by reversing the pattern you used when you removed them.
Remember: Piston rings are made different sizes to fit different engines. Always use the recommended size piston ring. Trying to improve the engine compression by using a large size ring only results in an incomplete seal between the piston and the cylinder.