304 rebuild : Ring Position - JeepForum.com

 
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post #1 of 13 Old 11-30-2009, 09:26 PM Thread Starter
cdjones
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304 rebuild : Ring Position

Starting to reassemble my 304, and have a question for all you motor builders about ring position. Haynes manual says to stagger compression ring gaps 270 degrees, which would be 90 degrees apart, but does not say where to position them. I always thought the oil ring seperator aligned with the wrist pin, oil ring retainers on a 1 inch overlap, and compression rings aligned on the skirt, 180 degrees apart.

Any opinions or advice?

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post #2 of 13 Old 02-04-2013, 02:35 PM
ericksin
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Bummer........ i have the same question

**** it, GAS IT!
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post #3 of 13 Old 02-04-2013, 03:12 PM
Matt1981CJ7
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Here's how I did mine.

From the book "BJ Builds an AMC".

Matt
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post #4 of 13 Old 02-04-2013, 05:20 PM
ericksin
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Originally Posted by Matt1981CJ7 View Post
Here's how I did mine.

From the book "BJ Builds an AMC".

Matt
Coool thanks

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post #5 of 13 Old 02-04-2013, 05:28 PM
Jack61
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Your new rings should have instructions with them. Go with them because ring manufacturing has evolved over the years.

It used to be, God bless America, it has become God help America
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post #6 of 13 Old 02-04-2013, 05:54 PM
ericksin
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Your new rings should have instructions with them. Go with them because ring manufacturing has evolved over the years.
They came with nothing

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post #7 of 13 Old 02-04-2013, 06:01 PM
Brewski
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You can start them off staggered but it really is not a critical part of your engine build. They will travel while the engine is running.
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post #8 of 13 Old 02-04-2013, 06:05 PM
Jack61
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That's odd. Most all ring manufactures have instructions with their ring sets specifying ring orientation. You might do a web search for your ring manufacture installation instructions.

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post #9 of 13 Old 02-04-2013, 06:23 PM
ericksin
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That's odd. Most all ring manufactures have instructions with their ring sets specifying ring orientation. You might do a web search for your ring manufacture installation instructions.
yep that's what i thought, i will look in to that

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post #10 of 13 Old 02-04-2013, 06:28 PM
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You can start them off staggered but it really is not a critical part of your engine build. They will travel while the engine is running.
Interesting i never thought about that, i though you install them a certain way and that's where they stay...... but i guess i would have seen wear marks

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post #11 of 13 Old 02-04-2013, 06:56 PM
ericksin
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Quote:
Originally Posted by Matt1981CJ7 View Post
Here's how I did mine.

From the book "BJ Builds an AMC".

Matt
Did you use a curtain install lube? or just a heavy oil...

**** it, GAS IT!
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post #12 of 13 Old 02-04-2013, 08:39 PM
Jack61
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It is very critical that you install and stagger the rings to manufactures specs or you may end up with a oil burner or low compression, the rings don't rotate on the piston. Use the same engine oil that you plan to put in the crankcase to install the pistons.

It used to be, God bless America, it has become God help America
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post #13 of 13 Old 02-04-2013, 08:53 PM
Brewski
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It is very critical that you install and stagger the rings to manufactures specs or you may end up with a oil burner or low compression, the rings don't rotate on the piston. Use the same engine oil that you plan to put in the crankcase to install the pistons.
http://en.wikipedia.org/wiki/Piston_ring
Mark em, put them in and run a few 1000 mile. They will not even be close to where you left them. That said I do suggest as stated above that you start them in the correct position. IMO it is thr crosshatching that makes them travel. Pretty cool, huh.
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