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12-11-2008, 01:33 PM
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Join Date: Aug 2007
Location: Galesburg Illinois
Posts: 29
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Small engine parts
Hello all, Where is the best place to get the small engine parts for Lycomings
such as Cylinder nuts, gears, cam bolts etc.
Thank you for all help
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12-11-2008, 01:45 PM
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Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,523
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A.E.R.O. is a good place for that ( www.aeroinstock.com) -- great prices and you can order online...
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Radomir
RV-7A sold
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12-11-2008, 01:54 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,562
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If it is a certified engine, it has to have Lycoming STD-XXXX nuts and bolts, and you can get them from aeroinstock or aviall. The part #'s for all nuts and bolts are all listed in the parts catalog for your engine. Believe it or not all of Lycoming bolts are grade 5. If its experimental, just use AN or good quality Grade 8 stuff. Obviously that's better than what Lycoming supplies for their engines. Now if its something like an STD-2209 crankshaft bolt, get that from aeroinstock.com.
You can choose to spend $300+ on OEM nuts and bolts, or buy something better from a reputable hardware supplier like Fastenal, and have better hardware. Again only if its experimental.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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12-11-2008, 01:58 PM
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Join Date: Aug 2007
Location: Galesburg Illinois
Posts: 29
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Internal 12 pt nuts on narrow deck
Is there an option to use something other than the internal 12 pt nuts that are used on the O-320 b3b narrow deck?
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12-11-2008, 02:00 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Not necessarily!
Quote:
Originally Posted by rocketbob
Believe it or not all of Lycoming bolts are grade 5. If its experimental, just use AN or good quality Grade 8 stuff. Obviously that's better than what Lycoming supplies for their engines. Now if its something like an STD-2209 crankshaft bolt, get that from aeroinstock.com.
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AN? OK. I wouldn't use a grade 8.
A grade 8 bolt is more brittle than a grade 5.
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Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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12-11-2008, 04:15 PM
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Join Date: Jul 2007
Location: Litchfield Park, AZ
Posts: 1,017
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Quote:
Originally Posted by Tkitchen1
Hello all, Where is the best place to get the small engine parts for Lycomings
such as Cylinder nuts, gears, cam bolts etc.
Thank you for all help
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www.sacskyranch.com
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Carlos in Arizona
EAA Chapter 538 www.chapters.eaa.org/eaa538
Wittman Tailwind W8 N53CH (built & sold)
Pazmany PL-1 N2029 (bought & sold)
RV7 - N537TC (reserved & building)
Emp, Wings & Fuse done - working on FWF
"The air is an extremely dangerous, jealous and exacting mistress. Once under the spell most lovers are faithful to the end, which is not always old age." - Winston Churchill
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12-11-2008, 05:55 PM
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Join Date: Oct 2005
Location: Melbourne, Australia
Posts: 1,866
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Quote:
Originally Posted by Mel
AN? OK. I wouldn't use a grade 8.
A grade 8 bolt is more brittle than a grade 5.
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More good advice from Mel. Grade 5 bolts (500 MPa ultimate tensile strength) are only case hardened. Grade 8 bolts (800 MPa ultimate tensile strength) are through-hardened and as such they are more brittle and therefore more prone to stress fracture.
Fastener technology is a science in itself and it completely freaks me out when I hear of builders using "intuitive" judgement as a basis for substituting specific fasteners as recommended by an engine manufacturer with some alternative fastener.
In the case of bolt grades....more is sometimes less.
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Bob Barrow
RV7A
Last edited by Captain Avgas : 12-12-2008 at 07:24 PM.
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12-12-2008, 07:25 AM
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Join Date: Jan 2005
Posts: 1,024
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Quote:
Originally Posted by Tkitchen1
Is there an option to use something other than the internal 12 pt nuts that are used on the O-320 b3b narrow deck?
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The reason they use the barrel nut, is clearance issues between the cylinder barrel and the nut. If you were to use something else, you might have clearance issues causing the nut to not fit up against the cylinder flange as it should.
Good Luck,
Mahlon
?The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk." |
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