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07-31-2016, 05:50 PM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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The hone is what I was thinking of. You didn't mention it in your first post. What kind of hone are you going to use?
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07-31-2016, 06:47 PM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by aerhed
The hone is what I was thinking of. You didn't mention it in your first post. What kind of hone are you going to use?
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I thought that may have been the case, as new rings without honing is pointless, I agree.
I was just going to use a three arm hone with 240 grit stones. I had thought about hitting it lightly with a 400 grit after the 240. I have a sunnen, but I don't think it will go past 5"
Larry
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N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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07-31-2016, 11:21 PM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Steel cylinders?
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Actual repeat offender.
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08-01-2016, 05:43 AM
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Join Date: Feb 2006
Location: Senoia, Georgia
Posts: 802
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Quote:
Originally Posted by lr172
Ok, I just found an article outlining the details. Apparently the narrow decks all had the threaded "Case bolt" (i.e. stud threaded into the case) and the wide decks used the "Body fit" (i.e. interference or close tolerance) bolts not threaded into the case.
Thanks for the help.
Larry
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Larry,
Not quite. I have a wide deck IO-360A1A (I realize my engine is completely different than yours). My engine was manufactured with 3 different thru-bolt designs, the threaded kind, the interference fit kind, and the floating kind. Give Lycoming a call and they will tell you exactly what you have based on the serial number on the case. I went through this a number of years ago, so I don't recall who I spoke with, but he was very helpful. If you have a case made by a different manufacturer (i.e., Superior or someone else) you will need to call them. If your the case was overhauled by CSI or Divco, you will need the yellow tag or other supporting documentation that has the original Lycoming serial no. because they might have filled and stamped over the original number. Ask me how I know!
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Jerry Esquenazi
RV-8 N84JE
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08-01-2016, 06:20 AM
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Join Date: Dec 2014
Location: hilltop lakes' Texas
Posts: 135
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New rings
I see nothing wrong with rings only on a 120 hr. engine. A&P # 1572130. Go to work.
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08-01-2016, 07:08 AM
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Join Date: Jan 2005
Posts: 1,025
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body fit or anchored thru bolts on Lycoming crankcases can be easily identified.
If you look at the crankcase above the starter. you will see the back end of the thru bolts that go to the front cylinder on the opposite side of the engine. If you see two nuts with fat washers securing the starter side of the thru bolt then you have body fit thru studs . If you see the end of a stud that is flush with the outside of the case, with not nuts or washers, you have anchored thru studs. All Lycoming engines use thru studs, N/D cases always had anchored thru studs. W/D cases can have either anchored thru studs(earlier design) or Body fit thru studs( later design). The rear most thru studs are always anchored regardless of case vintage or style.
Hope this helps.
Good Luck,
Mahlon
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"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
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08-01-2016, 07:38 AM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by aerhed
Steel cylinders?
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Yes. It is a mix of plain steel and nitrided.
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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08-01-2016, 07:41 AM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by mahlon_r
body fit or anchored thru bolts on Lycoming crankcases can be easily identified.
If you look at the crankcase above the starter. you will see the back end of the thru bolts that go to the front cylinder on the opposite side of the engine. If you see two nuts with fat washers securing the starter side of the thru bolt then you have body fit thru studs . If you see the end of a stud that is flush with the outside of the case, with not nuts or washers, you have anchored thru studs. All Lycoming engines use thru studs, N/D cases always had anchored thru studs. W/D cases can have either anchored thru studs(earlier design) or Body fit thru studs( later design). The rear most thru studs are always anchored regardless of case vintage or style.
Hope this helps.
Good Luck,
Mahlon
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Thanks Mahlon!
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N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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08-01-2016, 02:00 PM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by mahlon_r
body fit or anchored thru bolts on Lycoming crankcases can be easily identified.
If you look at the crankcase above the starter. you will see the back end of the thru bolts that go to the front cylinder on the opposite side of the engine. If you see two nuts with fat washers securing the starter side of the thru bolt then you have body fit thru studs . If you see the end of a stud that is flush with the outside of the case, with not nuts or washers, you have anchored thru studs. All Lycoming engines use thru studs, N/D cases always had anchored thru studs. W/D cases can have either anchored thru studs(earlier design) or Body fit thru studs( later design). The rear most thru studs are always anchored regardless of case vintage or style.
Hope this helps.
Good Luck,
Mahlon
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Mahlon,
I have a N/D case. Does the center through bolt thread into the right case half like the rear through bolt?
Larry
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N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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08-05-2016, 07:27 AM
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Join Date: Jan 2005
Posts: 1,025
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yes it does.
__________________
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
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