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  #1  
Old 01-26-2014, 05:48 PM
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Walt Walt is offline
 
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Default The Amazing Shrinking Air Filters

I find this all the time...

Wrong:


Right:


The E3450 you get from Van's is not the same as the E3450 from Spruce or other sources, the smaller ones lack the 'B" suffix seen here:


I've not found another source other than Van's for the correct filter.
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Last edited by Walt : 01-26-2014 at 07:49 PM.
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  #2  
Old 01-26-2014, 06:50 PM
TX7A TX7A is offline
 
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Default Maybe this?

See message #4 thru #6
http://www.matronics.com/digest/rv10....html#MESSAGE4
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  #3  
Old 01-26-2014, 07:04 PM
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Default

That's my point, the A077A6 is not the same as the A077A6-B but both are listed under the same E3450 PN.
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Walt Aronow, Dallas, TX (52F) RV7A, IO360, C/S, 1500+hrs

EXP Aircraft Services LLC
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  #4  
Old 01-26-2014, 07:05 PM
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sprucemoose sprucemoose is offline
 
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Default

The K&N filters are known to shrink over time, whether from heat or some other reason. How old/ how many hours on the one in the first pic?

I've bought E-3450 from Autozone and it's the same as the one from Vans. Same K&N part #, stands to reason it's the same unit.
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  #5  
Old 01-26-2014, 07:48 PM
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I guess I'll just have to go buy one at AZ and then compare it to the ones I get from Van's.

I've seen this at least half dozen times, perhaps they all shrunk exactly the same amount
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Walt Aronow, Dallas, TX (52F) RV7A, IO360, C/S, 1500+hrs

EXP Aircraft Services LLC
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Last edited by Walt : 01-27-2014 at 07:03 AM.
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  #6  
Old 01-27-2014, 04:53 AM
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Default

Are you saying you've never seen these filters shrink over time? Also, I'm still curious how many hours were on the smaller one. We could be talking about two completely separate issues here.
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  #7  
Old 01-27-2014, 05:31 AM
Kyle Boatright Kyle Boatright is offline
 
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Default

Quote:
Originally Posted by sprucemoose View Post
The K&N filters are known to shrink over time, whether from heat or some other reason. How old/ how many hours on the one in the first pic?

I've bought E-3450 from Autozone and it's the same as the one from Vans. Same K&N part #, stands to reason it's the same unit.
Same here.
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  #8  
Old 01-27-2014, 05:53 AM
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GLPalinkas GLPalinkas is offline
 
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Default

Quote:
Originally Posted by Kyle Boatright View Post
Same here.
+3 I just bought one for my recent condition inspection (240 hrs). Amazon ($32 IIRC) and it fit perfectly (E-3450). Yes, I cleaned the old one last year per K&N but didn't want to mess with it this year. The new ones come oiled and ready to go.

Walt,
do you have any connections at K&N so that you could check with them and settle this once and for all and have it made into an VAF engine sticky. Comes up all the time. Especially, when well respected AP guys, like yourself, have issues with the E-3450.

As and additional note, I read somewhere (probably here on VAF) that K&N was contacted and stated that the mold had not changed and the "Oil before Use" caution on the molded part was outdated. They come pre-oil'd.
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Last edited by GLPalinkas : 01-27-2014 at 06:24 PM. Reason: added text
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  #9  
Old 01-27-2014, 06:11 AM
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AlexPeterson AlexPeterson is offline
 
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Default

They do indeed shrink. I believe I'm on my 3rd filter in 12 years. The latest one doesn't seem to be shrinking as much, but the first two looked like the OP pic after about 4 or 5 years.
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  #10  
Old 01-27-2014, 06:46 AM
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Default

Ok maybe they do shrink that much over time, I know they shrink a little when you wash them but I had no idea they would shrink this much!

This particular aircraft only has about 450 hrs on it and is about 5 yrs old.

Maybe someone can post the ID/OD of the replacement filter they bought (with no 'B' suffix) and I'll get the same on the new Van's filter.
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Walt Aronow, Dallas, TX (52F) RV7A, IO360, C/S, 1500+hrs

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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