need advice installing oil rings

Mike(NEOhio)

Well-known Member
Location
Newbury, Ohio
I'm having trouble getting the oil rings to start into the sleeves. They're the type with two thin (.023) rings and wavy expander. Using a band type ring compressor but as the lower ring leaves the compressor it gets stuck in the chamfer. I making something from the bottom end of an old sleeve but that didn't work either. Sorry for the blurry picture.
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They can be a pest, what engine is this? How big is the chamfer?

Sometimes I've found if I went fairly fast they would go in. Other times I've had to help them in with screwdrivers, not my favorite method, but it worked.
 
It's a Buda 6-230 gas. The chamfer is a good 1/32. I think the trick would be to first compress the expander only. The rings are very pliable and should go in easy. Once the lower one is in it will hold the expander.
 
Try turning the ring compressor upside down. It might drop into the sleeve just enough to hold the rings till they go in.
 
I have always put stp on the inside of my ring suppressor. tightened it as tight as I could then sit the compressor on top of the sleeve to make sure its centered then use the wooden part of the hammer handle to tap the top of the piston till the cylinder is completely inside the sleeve. You do need to make sure you have a good lubricant t let it slide with.
 
I first tap down on the ring compressor using a piece of oak board on top of the compressor, tapping around it with a hammer to fully seat it all the way around against the sleeve.

It DOES seem to matter how fast you shove the piston down the compressor, the faster the better, up to a point.
 
I agree, tap down on the compressor, then push it in fast. After the piston is in look carefully for a mark on the inside of the liner in case a ring buckled and slid in between the piston skirt and liner. As me how I know!!!
 
I got em in today. I figured if the expander was compressed the rings would go in easy. I let the piston set with the ring in the chamfer then put the compressor on just a little above the deck so it left the lower ring loose. I got the compressor REALLY tight and with a little help from a screwdriver, tapped with a hammer handle. Once the lower ring started the whole thing went right in.
 
Did you put all the rings in the sleeve and check the gap before you installed them on the pistons? I found years ago that I was not the only one that made mistakes. Sometimes factory workers did also. Several years a go I bought a four cylinder set of rings from NAPA that were in one box. One pack not only didn't have a ring gap they would over lap in the sleeve.
I see you got them in and hope the lack of proper gap was not your problem. I wonder about the chamfer you talk about!
 
I checked all the gaps and they were OK. What did happen was when I got the main bearing set they were packaged wrong. Pairs of shells were nested without the flap in between. The OD ends made nicks in the ID of the lower shell. I called the supplier and sent a picture. They said they had a batch of them like that and sent a new set. On that set the bearing with the thrust faces had no oil hole. They were labeled Advantage Engine Parts but were from Federal-Mogul.
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