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  #1  
Old 01-11-2017, 12:01 PM
pastranafan5 pastranafan5 is offline
 
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Location: jonesboro, ar
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Default Zero time engine

I'm going to buy a zero time engine that has been sitting for years. What do I need to take off of it and check?
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  #2  
Old 01-12-2017, 08:35 AM
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sahrens sahrens is offline
 
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Location: Northern CA
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Default Lycoming service instruction

Search for the Lycoming Service Instruction 1481B, preservation of Lycoming factory engines. This is for engines in Lycoming factory packaging and as your engine is a zero time engine it was rebuilt by the factory or an authorized repair station designated by Lycoming to rebuild and "zero" the time.

There are specific inspections required every sixty days, but rather than try to repeat the entire SI here it would be easier to download it and read it yourself.

If the engine has not been preserved for years you may want to have it disassembled and throughly inspected.
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  #3  
Old 01-12-2017, 08:45 AM
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az_gila az_gila is online now
 
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Quote:
Originally Posted by sahrens View Post
Search for the Lycoming Service Instruction 1481B, preservation of Lycoming factory engines. This is for engines in Lycoming factory packaging and as your engine is a zero time engine it was rebuilt by the factory or an authorized repair station designated by Lycoming to rebuild and "zero" the time.

There are specific inspections required every sixty days, but rather than try to repeat the entire SI here it would be easier to download it and read it yourself.

If the engine has not been preserved for years you may want to have it disassembled and throughly inspected.
The SI is here -

https://www.lycoming.com/sites/defau...eservation.pdf

But it won't really help in the case of an engine sitting for years under someone else's control...
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  #4  
Old 01-12-2017, 09:07 AM
rhill rhill is offline
 
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Location: Valley Forge, Pa
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Lots of exposed steel inside a Lycoming engine,if it has sat in a humid environment,it may have developed rust in the cylinder bores & camshaft.
The best way to check is to remove a cylinder and check around with an inspection camera.The standard from Lycoming is 2000hrs or 12 years between overhauls,Lots of engines that are way past these numbers out there. In Lycoming speak "O time" has a specific meaning. Are there log books?Is there a build list?Are there a pile of 8130-3's? Whats the back story?
Bob
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  #5  
Old 01-12-2017, 11:10 AM
sblack sblack is offline
 
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If it was rebuilt by a good shop the bearing surfaces should be covered in assembly lube. That can last for a very long time. But obviously, you need to verify. We have all seen abuses of the term "0 time".
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  #6  
Old 01-12-2017, 11:45 AM
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sahrens sahrens is offline
 
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Quote:
Originally Posted by az_gila View Post

But it won't really help in the case of an engine sitting for years under someone else's control...
But it will give him an idea of how it should have been preserved and inspected. With that knowledge he can formulate a plan to correctly inspect the engine and return it to service.
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  #7  
Old 01-12-2017, 12:55 PM
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az_gila az_gila is online now
 
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Quote:
Originally Posted by sahrens View Post
But it will give him an idea of how it should have been preserved and inspected. With that knowledge he can formulate a plan to correctly inspect the engine and return it to service.
I would disagree, the SI does not help in this case... but it might help him after the inspection suggested in the previous posts, which are much more invasive than those listed in the SI.

PS, in most cases an actual link is better than a "search for"....
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  #8  
Old 01-12-2017, 03:21 PM
pastranafan5 pastranafan5 is offline
 
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Thank you very much. I need to look at the logbooks and see exactly what was done to it.
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  #9  
Old 01-12-2017, 08:43 PM
lr172 lr172 is offline
 
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It really depends on the type of lube they used and I doubt that would be documented in the paperwork. I would pull the accessory case. You should be able to easily identify any rust. You could also pull each cylinder to look for rust in the cylinders and on the camshaft (quite unlikely that cam lobes are clean, with the lifter bodies rusted). You won't be able to see the crank journals without splitting the case, but you may be able to see if a grease type assembly was used, which would make corrossion somewhat unlikely.

Larry
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