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Zero time engine

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.
 
sahrens said:
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.
Click to expand...

The SI is here -

https://www.lycoming.com/sites/default/files/Factory Engine Preservation.pdf

But it won't really help in the case of an engine sitting for years under someone else's control...
 
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
 
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".
 
az_gila said:
But it won't really help in the case of an engine sitting for years under someone else's control...
Click to expand...

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.
 
sahrens said:
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.
Click to expand...

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"....:)
 
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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