GX160 build
- Thread starter Valocalrep
- Start date
- Tags build gx160
If you are using a stock bore, buy rings that are for an oversized/overbored cylinder, but don't go crazy! Buy like a .005 or a .010 oversized ring and file the end gap until you get the desired tolerance/end gap. You need to keep you file square and make sure to knock down any burrs you created. A stock sized ring may have too much end gap!
When i ordered the piston and rings i got is https://www.amazon.com/gp/product/B00ENGWX0W/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
do you think those rings need to be filed down and thank you for the info
do you think those rings need to be filed down and thank you for the info
You won't know until you push them down in the cylinder. Remember, you are fitting the rings to the cylinder, not the piston! Take a ring and use the piston to slide it into the bore. The piston will square the ring in the bore to let you measure it. The bore wears more at the top than on the bottom. I would carefully put the ring right into the top of the bore and use the piston to push it about 3/8" down and measure from there. Then push it down another inch and measure it there, then one more inch. Rings are brittle so you need to handle them with care! Each ring needs to go through this process. The least critical is the bottom, or "oil" ring. It can be a little loose on the tolerance so long as it is not too tight. If any rings are too tight, then you would file the gap. Too tight a gap will allow the ring to butt up against itself and potentially ruin the ring, the cylinder, the piston, or all the aforementioned pieces. It's easy, just ask someone who's never done it!
So I took the piston back out today reoiled everything, and checked ring gap, The game was fine and once reassembled it still had a lot of drag. So tomorrow im going to take the stock piston and clean it up and put the new rings on it and see if it runs any smoother then the new piston. Also the new piston is too tall, i guess i got the wrong one because when i have it at top position it sticks out a good amount.
