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  #1  
Old 08-06-2018, 10:15 AM
dmat dmat is offline
 
Join Date: Oct 2010
Location: Union County, NJ
Posts: 334
Default WTB: Vac Pump Cover?

Anyone have a vac pump cover?

Thanks,
D
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  #2  
Old 08-07-2018, 05:28 PM
Binder Binder is offline
 
Join Date: Aug 2016
Location: Terre Haute, IN
Posts: 40
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Made mine out of 2.5x2.5" 1/4" aluminum. There isn't pressure in the accessory case so it will work just fine with the standard gasket. Cost me free instead of the 60$ for the lycoming part.
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  #3  
Old 08-07-2018, 06:03 PM
jibby212 jibby212 is offline
 
Join Date: Oct 2014
Location: Sarasota Fl
Posts: 112
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If you are talking about a block off plate I have one. They are easily fabricated but I know a guy at work who runs the cnc router and he works for cheap if he has the time . I had him make me two from 1/4 6061 and slightly rout out the back for that tiny bit of weight savings. I only needed one, if this is what you need you can have it. I even alodined it so its pretty.
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  #4  
Old 08-07-2018, 07:14 PM
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AlexPeterson AlexPeterson is offline
 
Join Date: Sep 2005
Location: Maple Grove, MN
Posts: 2,063
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Quote:
Originally Posted by Binder View Post
Made mine out of 2.5x2.5" 1/4" aluminum. There isn't pressure in the accessory case so it will work just fine with the standard gasket. Cost me free instead of the 60$ for the lycoming part.
It does have to seal against oil pressure. There is a galley which feeds the bearing in the vacuum pump base, or at least there is one on my O-360.
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  #5  
Old 08-07-2018, 07:57 PM
Doug Rohrer Doug Rohrer is offline
 
Join Date: May 2009
Location: Bowling Green, KY
Posts: 180
Default Cover Plate

Jibby212, if dmat does not take your extra block off plate, I could use it.
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  #6  
Old 08-07-2018, 08:44 PM
dmat dmat is offline
 
Join Date: Oct 2010
Location: Union County, NJ
Posts: 334
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I will take it jibby! Thanks!
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  #7  
Old 08-07-2018, 08:46 PM
dmat dmat is offline
 
Join Date: Oct 2010
Location: Union County, NJ
Posts: 334
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PM sent jibby, thanks again!

D
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  #8  
Old 08-08-2018, 07:38 AM
roy337@bellsouth.net roy337@bellsouth.net is offline
 
Join Date: Feb 2010
Location: Smyrna Tn.
Posts: 18
Default Vacuum cover

If anyone has a extra one available, I need one.
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  #9  
Old 08-08-2018, 09:56 AM
j-red j-red is offline
 
Join Date: Dec 2015
Location: Lewes, DE
Posts: 224
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Just made one myself last week for $4 in 1/4" aluminum barstock. The manufactured ones have a circular recess in the middle, which seems to be a relief to accommodate the gear protrusion. My plan is to remove the gear and gear housing altogether and put a flat plate to cover the entire area. I don't believe any special recess is then required. (Just make sure to remove the gear housing if you remove the gear, otherwise you will introduce an internal oil leak that will reduce useful oil pressure).
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  #10  
Old 08-08-2018, 10:46 AM
Merakulous Merakulous is offline
 
Join Date: Nov 2017
Location: Saint Johns, Florida
Posts: 6
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Quote:
Originally Posted by j-red View Post
Just made one myself last week for $4 in 1/4" aluminum barstock. The manufactured ones have a circular recess in the middle, which seems to be a relief to accommodate the gear protrusion. My plan is to remove the gear and gear housing altogether and put a flat plate to cover the entire area. I don't believe any special recess is then required. (Just make sure to remove the gear housing if you remove the gear, otherwise you will introduce an internal oil leak that will reduce useful oil pressure).
For my Lycoming 0-290 (which uses the same O-320 accessory housing) I removed the vacuum system entirely. I removed the vacuum pump drive gear, the square gear housing and the studs. I then installed the Lycoming plate with the circular recess using hex bolts instead of studs and nuts. I figured removing the gear would remove some minuscule amount of drag on the engine, and weight. It also provides some extra clearance in the area.

At the same time, I installed a new digital engine oil pressure/temp gauge. My oil pressure is lower than I'd like when hot (like around 40 psi), so your statement about the reduced oil pressure has me wondering. My prior oil pressure gauge (analog Westach) may or may not have been accurate but I think it used to read around 60 psi, although I didn't have much time with it before changing things out. Maybe I just need to bump up the pressure via thicker washers against the relief valve spring? Or... should I reinstall the housing and gear with the Lycoming plate? Thoughts?
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