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  #11  
Old 11-02-2016, 08:15 AM
8 ball 8 ball is offline
 
Join Date: Dec 2014
Location: hilltop lakes' Texas
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Default Stud oil leak

Gil is correct concerning the narrow deck engine, however all case studs should have "0" ring seals. See lyc repair manual.
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  #12  
Old 11-02-2016, 09:30 AM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
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Exclamation

Quote:
Originally Posted by 8 ball View Post
Gil is correct concerning the narrow deck engine, however all case studs should have "0" ring seals. See lyc repair manual.
Yes, but the addition of those seals is optional per this Lycoming SI -

http://nebula.wsimg.com/e25dfd622fa8...&alloworigin=1

Older engines may not be machined for the o-ring seals, and they are not called out in the older parts manual.
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  #13  
Old 11-02-2016, 10:37 AM
ambrosesquadronca ambrosesquadronca is offline
 
Join Date: Sep 2005
Location: Quartz Hill, CA
Posts: 18
Default Stud Oil Leak

Thank you everyone for your responses.

Lycoming confirmed I have a wide deck engine.

Lycoming suggested that Loctite 290 may work but it is not an approved repair by them. They mentioned it because I have the "experimental" Lycoming engine (YIO...) so it may be worth a try.

The repair for this is in Lycoming Service Instruction 1290F which Gil posted the link for (thanks Gil). This SI has a repair for assembled and disassembled engines.

Dave
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  #14  
Old 11-02-2016, 11:26 AM
Berchmans Berchmans is offline
 
Join Date: Nov 2009
Location: Anchorage, Alaska
Posts: 457
Default The Old Joke

The old joke about lycomings is that if they isn't a small leak somewhere you should check to be sure that the engine has oil.
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  #15  
Old 11-02-2016, 12:00 PM
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lucaperazzolli lucaperazzolli is offline
 
Join Date: Sep 2006
Location: Trento, northern Italy
Posts: 622
Talking

Quote:
Originally Posted by Berchmans View Post
The old joke about lycomings is that if they isn't a small leak somewhere you should check to be sure that the engine has oil.
That's the same for H.D.
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  #16  
Old 11-02-2016, 02:20 PM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,393
Default Hold down plates

Quote:
Originally Posted by az_gila View Post
I hope it's not a narrow deck engine since there are no cylinder hold down plates...

Very early 0 320 narrow deck did not have hold down plates.
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  #17  
Old 11-02-2016, 06:57 PM
tim2542 tim2542 is offline
 
Join Date: Aug 2009
Location: Redding,Ca
Posts: 633
Default

An "A" at the end of the S/N means it's a wide deck.
Tim Andres
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  #18  
Old 11-02-2016, 07:03 PM
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az_gila az_gila is offline
 
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Location: 57AZ - NW Tucson area
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Smile

Quote:
Originally Posted by jrs14855 View Post
Very early 0 320 narrow deck did not have hold down plates.
Correct, but the original posters pic was for an O-360, which is what this discussion is about...
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