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02-22-2018, 10:05 AM
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Join Date: Jan 2015
Location: McKinleyville CA
Posts: 260
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What is the Secret to valve cover leaks?
What is the secret to keeping the valve from leaking? Silicone gaskets? Studs and locking nuts? Open to all input. Seem like my cork gaskets leak no matter what I do on my 360.
Caleb
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Flying RV-7A N542LC with SDS Electronic fuel injection.
RV-8 Kit for sale
ATP CFI A&P
Air Ambulance driver
Based at EKA, Northern CA
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02-22-2018, 10:12 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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02-22-2018, 10:21 AM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,208
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Quote:
Originally Posted by Norcalrv7
What is the secret to keeping the valve from leaking? Silicone gaskets? Studs and locking nuts? Open to all input. Seem like my cork gaskets leak no matter what I do on my 360.
Caleb
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The silicone gaskets are very good. Just don't over-torque the screws and distort the valve covers.
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Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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02-22-2018, 10:22 AM
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Join Date: Jul 2012
Location: Bartlesville, OK
Posts: 237
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I put "Real" brand gaskets on a few of my leaky covers 15 hours ago, and so far everything is dry.
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Andrew Austin
RV-10
-Flying!
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02-22-2018, 10:30 AM
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Join Date: Jan 2005
Location: Powder Springs, Ga
Posts: 309
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Oil Leaks
Tight seal on cork gaskets. Just a pain when you remove them.
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Kurt Lohmueller A&P, DAR
Powder Springs, Ga
RV6A "Kurt's Toy" - Flying
RV12 - Flying - Sold
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02-22-2018, 11:04 AM
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Join Date: Jan 2005
Location: NC25
Posts: 3,502
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20-years ago, I removed the cork gaskets and installed silicone gaskets. 3,300+ flight hours later, still no leaks.
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Gary A. Sobek
NC25 RV-6 Flying
3,400+ hours
Where is N157GS
Building RV-8 S/N: 80012
To most people, the sky is the limit.
To those who love aviation, the sky is home.
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02-22-2018, 11:07 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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The REAL silicone valve cover gaskets are just about the only thing that *doesn't* leak on a Lyc.
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02-22-2018, 11:13 AM
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Join Date: Jan 2010
Location: Southern Michigan
Posts: 1,964
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Yeah,,,,you can buy the "REAL" silicone gaskets for $$$, or settle for the "fake" ones that are non TSO'd for $. Both will leak if your stamped steel rocker box covers are distorted, bent up, and not flat. They will both leak if installed incorrectly also. 
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David C.
Howell, MI
RV-10: #41686 Under Construction
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2020
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02-22-2018, 11:19 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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Oh, I didn't mean you have to buy certified anything. It's just been so long since I've had to buy a valve cover gasket, the only ones on the market at the time were the REAL (brand) versions.
Charlie
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02-22-2018, 11:57 AM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,277
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Quote:
Originally Posted by clutch22
I put "Real" brand gaskets on a few of my leaky covers 15 hours ago, and so far everything is dry.
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+1
I have had these on my 320 for almost 500 hours. Not a single leak. They are re-usable as well.
Larry
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N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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