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Old 03-25-2020, 09:57 PM
werxcv01's Avatar
werxcv01 werxcv01 is offline
Join Date: Aug 2008
Location: Brandon, MS
Posts: 15
Default O-360 RV-8 K&N filter question

I purchased a flying RV-8 last year and am now preparing for the annual condition inspection. This aircraft has a Lycoming O-360 and the standard Vans airbox.

I want to purchase a second K&N air filter, but does this setup require cutting a notch and sealing the filter like on the O-320? I previously had an RV-6A with the O-320 that required a notched filter.

If the notch is required, what is the correct sealant to use?

Unfortunately this aircraft did not come with the builder plans and the drawings I purchased on a flash drive from Vans did not include the FAB plans.
Sold -6A, flying an 8 & a C182RG. Donated for 2020.
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Old 03-25-2020, 10:35 PM
Robin8er Robin8er is offline
Join Date: Sep 2015
Location: Socal
Posts: 404

Depends on the carburetor used. I think typically the answer is no, you dont need to cut the filter. But if the accelerator pump is in the way then you will need to cut it. The correct sealant to use is pro seal, the same sealant used in the fuel tanks.

Do not use RTV, it can break down from the fuel and get sucked into the intake.
RV-8 N695RA flying
Working on an RV-4

Born to fly, forced to work
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Old 03-25-2020, 10:46 PM
RV8JD's Avatar
RV8JD RV8JD is offline
Join Date: Jan 2005
Posts: 665

The filtered air box was ordered separately from the kit. See this Van's web page for applicability. You can probably contact Van's for a set of FAB plans.

Below is a link to the filter element (E-3450):
Carl N.
Arlington, WA (KAWO)
RV-8, 675 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflügel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 03-25-2020 at 10:52 PM.
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Old 03-26-2020, 06:13 AM
Walt's Avatar
Walt Walt is offline
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,430

No the filter does not get trimmed with the 360 carb.
Walt Aronow, DFW, TX (52F)

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
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RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
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