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07-13-2013, 12:08 AM
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Join Date: Nov 2005
Location: San Francisco, CA
Posts: 525
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Exhaust gasket leak?
I just noticed this on a couple of cylinders. It is a bit of grey or white discoloration around the exhaust port. It looks like the exhaust must be leaking in this area? 270 hours on engine. nuts are torqued to at least 100 in-lbs.
Any recommendations? Should i just replace the gaskets? With or without sealant? Or just torque the nuts down more?
I am pretty sure this gasket was installed dry without any sealant or RTV.
Thanks for the input!
Jae
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#40533 RV-10 Builder and CFI
1/2006 Started build
10/19/2011 First flight
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07-13-2013, 06:39 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,668
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Doesn't look like a leak to me, torque the nuts to 160 -180 in/lbs and keep an eye on them (not sure where you got 100 from but that is not correct.
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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
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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07-13-2013, 09:47 AM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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looks like new. is the hose clamp for the egt? nice pic!
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TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015 
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
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07-13-2013, 12:36 PM
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Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,767
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EGT hose clamp appears to be hung up on something? It should be snug on the exhaust pipe, all the way around.
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07-13-2013, 01:30 PM
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Join Date: Nov 2005
Location: San Francisco, CA
Posts: 525
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ok, thanks. I'll snug it up more, clean and watch it. I will probably go ahead and pull it all off and replace the gaskets eventually.
oh that is just the tail of the hose clamp which is just hanging loose.
i just got a chance to review the vetterman instructions, and they clearly say tighten to 140-180 inlbs and to check the torque periodically. i will have to add this to my condition inspection checklist, which i don't think is on there now. it does seem to me that the nuts have loosened up since it was first installed.
thanks again!
Jae
__________________
#40533 RV-10 Builder and CFI
1/2006 Started build
10/19/2011 First flight
Last edited by jchang10 : 07-13-2013 at 01:36 PM.
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07-13-2013, 02:50 PM
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Join Date: Oct 2005
Location: Highland Village, TX
Posts: 1,519
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Quote:
Originally Posted by jchang10
i just got a chance to review the vetterman instructions, and they clearly say tighten to 140-180 inlbs and to check the torque periodically thanks again!
Jae
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The original instructions I received from Vetterman specified 140 in lb. I mentioned this to Walt one day (since I'm lucky enough to have my plane in his hanger) and even showed him the Vetterman instructions. Walt called Vetterman and bottom line is that some of Vetterman's printed instructions incorrectly specified 140 in lbs.
I ran with 140 in lbs for about 3 years (checking torque every 50 hrs) with no problems. After Walt talked to Larry, I bumped the torque up to 180 in lb.
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Rick Aronow,
A&P
Flying 7A Slider;
RV-12 SOLD
Highland Village,TX
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