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  #1  
Old 04-21-2017, 12:32 PM
erich weaver's Avatar
erich weaver erich weaver is offline
 
Join Date: Aug 2006
Location: santa barbara, CA
Posts: 1,442
Default Dropped Pmag retaining bracket into accessory case

Bad day. As i was reinstalling one of my pmags I dropped the aluminum retaining bracket and it disappeared through the mag hole I nto the accessory case. My heart sunk as I realized what I had just done. Reached my fingers as far in as I can to retrieve it but I can't feel it and I don't see it with a lighted mirror. Thinking it has likely dropped down into the oil sump and I will have to remove that to get it out. Does that sound like the right course of action?

Arrrgh!

Thanks for any words of wisdom you may have

Erich
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  #2  
Old 04-21-2017, 12:44 PM
jabarr jabarr is offline
 
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Location: Fayetteville, Georgia
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Are you sure it's aluminum? Most of those blocks are steel I thought. Hopefully a magnet on a string will get it.
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Old 04-21-2017, 12:45 PM
Kyle Boatright Kyle Boatright is online now
 
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How about an inspection camera and a "grabbing device" - one of the plunger operated ones with 3 wire fingers?
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  #4  
Old 04-21-2017, 01:17 PM
climberrn climberrn is offline
 
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Mine are steel I'd look around with a magnet for a while before pulling the sump.
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  #5  
Old 04-21-2017, 01:21 PM
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erich weaver erich weaver is offline
 
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The retaining brackets are definitely aluminum so no go on magnet. I have a grabber tool but there is very little maneuvering room and obviously it's fishing around blind. Tried for awhile without luck.

Erich
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  #6  
Old 04-21-2017, 01:51 PM
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bkervaski bkervaski is offline
 
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Location: Birmingham, Alabama
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That sucks. I did that with a Harley engine I was rebuilding. Had to take the whole freaking thing apart to get it. From that day forward, I stuff paper towls in *any* openings before I go near it. Good luck on your search and that sucks
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  #7  
Old 04-21-2017, 02:00 PM
lr172 lr172 is online now
 
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If I remember correctly, there are 2 or 3 inlets for the oil screen cavity spaced pretty far apart. Take a look at a picture or diagram of the oil pan. If there is enough inlet volume remaining once blocked by the piece floating in there, you should have no major issues. There is a screen to keep that piece from being sucked in and your only risk is that part blocking the inlet and reducing oil flow. I believe the oil inlet channel running up the sump is 3/8"-1/2" diameter. That is the minimum area that you need for flow into the oil screen cavity, after accounting for current part blockage plus additional margin for other parts creating blockage.

The best answer is to pull the sum and get it out. I wouldn't expect it to take but a few hours to pull the sump and replace it. Don't forget to buy a new gasket before starting.

I would create a bendable rod with a 1" X 1" plate attached and start dragging the bottom of the sump with it. You should be able to find it and drag it to a corner where you can pick it up with a "grabber." The part can't bounce in the oil, therefore it should be within 3" of the aft wall of the sump.

Larry
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Last edited by lr172 : 04-21-2017 at 02:07 PM.
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  #8  
Old 04-21-2017, 02:13 PM
Skyflyer Skyflyer is offline
 
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Location: Sugar Land, TX
Posts: 139
Default Learned this lesson the hard way too.

I approached the removal of my P-mags with the knowledge that a slip up might result in loss of something into the case. Then I made my first mistake. I removed the bottom clamp first. While removing the top clamp the mag suddenly dropped and the clamp was lost into the great oily void.

I was able to retrieve it with only modest effort. Drain the oil then inspect the case with a flexible inspection scope borrowed from a friend. I spotted the clamp partially obscured in the bottom of the pan nearly straight down. Using a spring fingered grabber I positioned the clamp so that I could stick the grabber with prongs held together through the hole for the mounting stud. I released the grabber opening the prongs and the clamp was mine!

Try this before considering any disassembly. I now religiously leave the bottom clamp tight until the top clamp, washer and nut are safely on the work table. Of course when reassembling, attach the bottom clamp first.

Good luck
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  #9  
Old 04-21-2017, 02:31 PM
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Toobuilder Toobuilder is offline
 
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Ive done something similar. Best bet is to drain the oil and see if you can shake the piece down to a lower sump plug. If you can do that, grab it with a loop of safety wire (not a hook, a loop, so it cant come off). Next step is to work a piece of stiff wire from under the engine, through the drain plug and out the mag hole. Attach the free end of the safety wire to the stiff wire securely, then withdraw the whole mess from the mag hole.
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  #10  
Old 04-21-2017, 03:02 PM
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David-aviator David-aviator is offline
 
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Not sure of the shape of the bracket but if it has flat side I would try sucking it out with 1/4" rubber or plastic hose. Hook the hose up to a shop vacuum and fish it down, you may just luck out and have it land on flat side of piece and maybe carefully lift it out.

Maybe a dumb idea but I'd try it depending on shape of piece.
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