460 ring installation
Logistics Pro
Joined: Jun 2008
Posts: 4,990
Likes: 6
From: Florida
A few of the pistons I pulled from my 300 had the ring gaps lined up as well. 
For some reason, it seems that RTV, missing bolts, and carelessness have become essential parts of today's backyard engine rebuilds.
For some reason, it seems that RTV, missing bolts, and carelessness have become essential parts of today's backyard engine rebuilds.
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Freshman User
Joined: Aug 2010
Posts: 40
Likes: 0
I've got too much $$$ into this motor now. There's no way I'm going to hack it up!
Laughing Gas
Joined: Nov 2010
Posts: 924
Likes: 4
From: Johns Creek GA
I don't understand why this should be, though. Those gaps are completely closed when the piston is in the cylinder, are they not? Then why would it matter how the gaps line up?
I don't dispute that the instructions say what they say, but I don't get the why of it.
I don't dispute that the instructions say what they say, but I don't get the why of it.
Posting Guru
Joined: Feb 2010
Posts: 2,006
Likes: 2
From: CASA GRANDE AZ
GAPS ARE NOT COMPLETELY CLOSED , THERE IS A SPEC FOR END GAPS !
and with a bad or no air filter and operating in dust the end gaps can enlarge to look like the grand canyon !
and with a bad or no air filter and operating in dust the end gaps can enlarge to look like the grand canyon !
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Freshman User
Joined: Aug 2010
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Likes: 0
I guess it doesn't matter which compression ring is positioned where. I ended up positioning the top ring at 4:30 and the second ring at 7:30. Unfortunately, I broke the second ring on the second piston when I was placing the ring compressor over the piston. It didn't take much effort to break it. I was rather surprised.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
I easily broke one of my original rings trying to remove it, that's why I had my engine builder/machinist install the new rings on the new pistons.
There is a top & bottom orientation to the rings - IOW they can be installed upside down - but I forget how to tell which way is UP.
There is a top & bottom orientation to the rings - IOW they can be installed upside down - but I forget how to tell which way is UP.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
I guess it doesn't matter which compression ring is positioned where. I ended up positioning the top ring at 4:30 and the second ring at 7:30. Unfortunately, I broke the second ring on the second piston when I was placing the ring compressor over the piston. It didn't take much effort to break it. I was rather surprised.
I easily broke one of my original rings trying to remove it, that's why I had my engine builder/machinist install the new rings on the new pistons.
There is a top & bottom orientation to the rings - IOW they can be installed upside down - but I forget how to tell which way is UP.
There is a top & bottom orientation to the rings - IOW they can be installed upside down - but I forget how to tell which way is UP.
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