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  #1  
Old 12-08-2022, 07:54 AM
Majorpayne317641 Majorpayne317641 is offline
 
Join Date: Sep 2021
Location: Goldsboro, NC
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Default Flow Divider Bracket screw size/type?

Iím overhauling my IO-360. Does anyone know what AN screws are used for the 4 flat head screws used to attach the flow divider to the bracket that sits on top of the engine? One of them got stripped and had to be drilled out. The others are in bad shape too. Thanks.
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  #2  
Old 12-08-2022, 08:34 AM
lr172 lr172 is offline
 
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Quote:
Originally Posted by Majorpayne317641 View Post
I’m overhauling my IO-360. Does anyone know what AN screws are used for the 4 flat head screws used to attach the flow divider to the bracket that sits on top of the engine? One of them got stripped and had to be drilled out. The others are in bad shape too. Thanks.
It is highly likely that they will be either 8-32 or 10-32. Take one of the others out and measure. 8's are ~.16" and 10's are ~.19" 10-24's are quite uncommon in aviation, but if they are 10's it would be wise to compare the threads to one of the 8-32 screws in your bin to be sure.

That divider is aluminum, if I recall, so if the screw threads are messed up that bad, you need to carefully check the threads in the divider for damage and make sure there is enough thread meat left to hold on.
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Last edited by lr172 : 12-08-2022 at 08:40 AM.
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  #3  
Old 12-08-2022, 10:39 AM
Majorpayne317641 Majorpayne317641 is offline
 
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The divider was fine the screw head was stripped out and the head needed to be drilled. Then the thread came out of the divider without a problem. Thanks for the help I thought they may be that size, I just donít know how to find the aviation grade version of these.
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  #4  
Old 12-08-2022, 10:57 AM
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RYOUNG RYOUNG is online now
 
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My engine parts manual shows STD 82 screw which is 10-24 x 1/2 inch filister head (AN503-10-8 has a drilled head). My manual is for a narrow deck IO-360B1B, 180hp. I’m also in the process of overhauling this engine. I would not want to attempt an overhaul without access to a parts manual. I was able to download mine off the internet for free.
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Last edited by RYOUNG : 12-08-2022 at 11:42 AM. Reason: Added
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  #5  
Old 12-08-2022, 01:24 PM
Majorpayne317641 Majorpayne317641 is offline
 
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I didnít realize that would be in the parts manual. I just looked it up for my M1B and you are right. It also calls for specific washers STD 251 for anyone else interested.
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