I have a 2003 570 m cat fan cooled it was just rebuilt and it lasted 2 rides, O tore the top end off and found the pto piston looks like a ring broke and melted into the piston, then i noticed that the top ring gap was at the exhaust port is that where it should be???? looks like the bottom ring was there too. they were 2 new pistons and they both had br stamped on them and a punched dot and one, the piston on the pto side was in backwards as well does this matter???? any info or suggestions would be great thanks
03 570 Need help
- Thread starter Frewsky
- Start date
570 Fan
Yes the rotation of the pistons is very important. Someone put the pistons in backward which is why you engine is tore up. Most likely you will have to replace both pistons and hone the cylinders. If you had somebody do this work for you, take it back. Don’t take it apart any farther.
Yes the rotation of the pistons is very important. Someone put the pistons in backward which is why you engine is tore up. Most likely you will have to replace both pistons and hone the cylinders. If you had somebody do this work for you, take it back. Don’t take it apart any farther.
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Thanks for the info, just wondering witch way do the piston rings go and is there a top and bottom to the ring thanks
570 Fan
Sorry - I am not that familiar with the arctic cat engines. Typically the piston has a mark that should be pointing towards the exhaust port. Some have the word "EXH" stamped on the top of the piston. If you are not experienced with putting engines together, have someone help you. At a minimum you should get a shop manual for your engine.
Sorry - I am not that familiar with the arctic cat engines. Typically the piston has a mark that should be pointing towards the exhaust port. Some have the word "EXH" stamped on the top of the piston. If you are not experienced with putting engines together, have someone help you. At a minimum you should get a shop manual for your engine.
Yah I just paid a shop to get it rebuilt and it blows up after 2 rides, just trying to find more info thanks
anyone ???
From the Cat pistons that I have messed with, they will usually have a pin in the ring groove. This is where the ring gap goes. The pin keeps the rings from rotating in the groove and catching on a port. Most rings have a top side and usually have a taper or a mark on the top of the ring. Hope this helps.
