Top Piston Ring Upside Down

But the rings could not be put in upside down.

Top piston ring upside down. These must be put in correctly or you ll get poor ring seal or have a ring that can t compress properly into the piston groove which i imagine would be very hard to install into the cylinder and do. Some rings have a taper on the piston side and some have a notch that is different top to bottom for the locating pin. Now granted some steels are better than others but as rings get smaller and specific output increases the demands on the top ring which sees the most abuse are highest move down a groove on the piston and the different job being performed places lower demands on the material being used. If the ring is installed upside down that won t work properly.

Place the ring squarely into the piston groove taking care to keep it flat. Piston rings usually have a chamfer on the back side that uses the gas pressure to help seal the piston ring against the cylinder wall. Hi people i ordered a piston and rings from dr atv but the rings do not have the n or t markings on them to determine which was is up and which way is down. While this may seem like an overly simple concept overlooking something as basic as installing the pistons in the correct orientation can wreak havoc on an engine in the blink of an eye.

Work the opened ring down from the top of the piston to the oil groove. It only takes a minute check all rings on the piston for correct installation before installing the pistons. When using a two piece oil install the hump style spring in the groove then follow the above instructions. When pistons are designed the face of the piston can be broken down into four areas top bottom left and right.

The upside down depiction of the intermediate ring in the fsm is just one of the many errors it contains. Most 4 cycle powersports pistons use three rings and knowing which ring goes where is critical. Post nov 16 2015 8 2015 11 17t00. Mix them up and it won t work properly either.

Release the tension of the ring installer tool. My yz250 wiseco rings would be the same whichever way you installed them. Also the top ring is often different from the second ring. The overall best top ring material is steel.

The barrel shaped top compression ring has an asymetrical cross section that can be difficult to see with the naked eye. The barrel allows ring rocking to greatly increase tbo due to improved long term sealing of the ring package.