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06-18-2014, 02:59 PM
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Join Date: Sep 2006
Location: Port Orange, FL
Posts: 1,020
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Auto Spark Plug Terminal came off
During run up I noticed rough running on electronic ignition. When the cowl was removed I saw the #2 ignition wire was laying on the side and not connected to the spark plug. Closer inspection showed that the spark plug terminal is unscrewed from the plug and is still in the ignition wire boot. I checked all other spark plugs and their terminals are still secure. The spark plug is NGK Iridium BR8EIX with 810 hrs in service.
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Ted Chang, VAF #681
RV-9A #91048, flying since 8/2006. 2,050 hrs.
2018 Due paid
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06-18-2014, 03:11 PM
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Join Date: Sep 2010
Location: Charlotte NC
Posts: 1,166
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It's recommended that you use the plugs with a solid terminal. They are harder to find. I order mine from sparkplugs.com.
George
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06-18-2014, 03:12 PM
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Join Date: Apr 2012
Location: Tampa (BKV)
Posts: 926
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Pretty well documented in here. Never use the screw on terminal plugs. Get the solid top types. I use NGK #3961, available at local O'Reilly auto parts or Amazon.
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RV-8 Flying
1,235th flying RV8
SARL Race#95
SnF Homebuilt Judge
2015 Sun n Fun Kit Built Reserve Grand Champion
2015 Oshkosh Kit Built Champion
2015 Jeffco Kit Built Grand Champion
2014 Oshkosh Outstanding Workmanship Award
Broken Warrior of the Jarhead Clan
Last edited by ColoRv : 06-18-2014 at 03:15 PM.
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06-18-2014, 04:20 PM
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Join Date: Oct 2005
Location: Highland Village, TX
Posts: 1,519
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NGK BR9EIX
I use NGK BR9EIX Iridium plugs. They have a solid terminal.
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Rick Aronow,
A&P
Flying 7A Slider;
RV-12 SOLD
Highland Village,TX
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06-18-2014, 05:07 PM
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Join Date: Jan 2005
Location: Hopkinsville, KY
Posts: 957
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Both ways
Ted, I used NGK BR8ES plugs and you can get them both ways screw on caps or solid cap, I get the solid caps.
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Bobby Hester - Builder/Pilot/A&P
Surfing the web from Hopkinsville, KY
N857BH RV7A XP-O360 - Garmin G3X ADS-B IN/OUT 2020 Compliant
Web site: http://www.newtech.com/bobbyhester/RVSite.htm
Dec. 2019 VAF donator - alot better than any magazine subscription
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06-18-2014, 06:54 PM
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Join Date: Mar 2010
Location: KSGJ / TJBQ
Posts: 2,034
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Advance Auto normally has the NGK BR8ES with the solid cap (PN 3961) in stock. I paid $2.19 each for the last set I bought. I don't use the more commonly available NGK BR8ES (PN 5422) with the screw on cap for that very reason.
Last edited by GalinHdz : 06-18-2014 at 06:57 PM.
Reason: corrected the link
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06-18-2014, 07:41 PM
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Join Date: Sep 2006
Location: Port Orange, FL
Posts: 1,020
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Thanks for information. When I ordered my plugs I did not realize the difference. I ordered BR8EIX and got BR8EIX #5044. It turned out #5044 has screwed on cap. Just checked and found BR8EIX #6747 that has a solid terminal. Most websites only list BR8EIX and we don't know whether it is solid or screw on terminals. One more listen learned.
__________________
Ted Chang, VAF #681
RV-9A #91048, flying since 8/2006. 2,050 hrs.
2018 Due paid
Last edited by tc1234c : 06-18-2014 at 08:41 PM.
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06-18-2014, 08:35 PM
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Join Date: Sep 2007
Location: BC
Posts: 1,674
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If a person was to already have the 5422 plugs (screw off terminats), could they be made to be "solid" by securing them with the strongest version of Loctite?
Bevan
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RV7A Flying since 2015
O-360-A1F6 (parallel valve) 180HP
Dual P-mags
Precision F.I. with AP purge valve
Vinyl Wrapped Exterior
Grand Rapids EFIS
Located in western Canada
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06-18-2014, 08:41 PM
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Join Date: Feb 2006
Location: Valley Forge, Pa
Posts: 636
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Quote:
Originally Posted by Bevan
If a person was to already have the 5422 plugs (screw off terminats), could they be made to be "solid" by securing them with the strongest version of Loctite?
Bevan
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May or may not affect conductivity,I would think a light squeeze with a side cutter malformed the terminal end would lock it in place. Still auto plugs are cheap compared to aviation,nothing like a fresh set of plugs.
RHill |
06-19-2014, 07:18 AM
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Super Moderator
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Join Date: May 2005
Location: Locust Grove, GA
Posts: 2,624
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Screw on tight
Everyone once in a while I will mistakenly get the screw on caps instead of the solid core plugs. I just screw them on really tight with pliers prior to installation and have never had a problem.
810 hours of service is pretty good. I think the plug was telling you it was time for a change. 
Vic
__________________
 Vic Syracuse
Built RV-4, RV-6, 2-RV-10's, RV-7A, RV-8, Prescott Pusher, Kitfox Model II, Kitfox Speedster, Kitfox 7 Super Sport, Just Superstol, DAR, A&P/IA, EAA Tech Counselor/Flight Advisor, CFII-ASMEL/ASES
Kitplanes "Unairworthy" monthly feature
EAA Sport Aviation "Checkpoints" column
EAA Homebuilt Council Chair/member EAA BOD
Author "Pre-Buy Guide for Amateur-Built Aircraft"
www.Baselegaviation.com
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