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Questions from my 'annual'

 
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recapen(at)earthlink.net
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PostPosted: Fri Jun 05, 2015 9:30 am    Post subject: Questions from my 'annual' Reply with quote

As part of my recent 'annual', I swapped the plugs upper for lower after cleaning and regapping.
The #2 lower plug looked like some of the plating was peeling from the outside of the body. The uppers looked brand new.
Is this 'plate-peeling' indicative of excessive heat at the plug - or maybe a defect in manufacturing? The CHTs all run between 350 and 375 and within five degrees of each other so I am leaning to a manufacturing defect....

Further along in the inspection process, the #1 intake tube from the head to the intake/sump is marked as "AEL70485 Rev C" but the rubber tube that connects the two appears to be short. Is the intake tube the correct number? Where can I get the material that the rubber connecting tubes are made from in bulk? It looks like reinforced radiator hose - with an aircraft part number. I would like to make that one a quarter inch longer - unless the metal tube is the wrong one and too short.

Low time IO360B1F6 - fairly regularly run. Compression tests - 79/80 on all four. Oil temps 180-190.
RV6A with Sam James cowl and plenum. LASAR ignition and AFP injection. Turning a MTV12B 183-59 three blade MT prop.

Thoughts please,
Ralph


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PostPosted: Mon Jun 08, 2015 7:26 am    Post subject: Questions from my 'annual' Reply with quote

I got the answer to one of my questions - the AEL70485 is the correct part number for the intake tube. Still looking to find out where I can get the bulk material that the 69603 part (rubber connecting tube - 1 3/4"ID x 2 3/16"OD x 1 3/4" long) is cut from.

Also still looking to find out if anyone else has experienced their spark plug exterior plating peeling off?!

Thanks,
Ralph Capen

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Dale Ensing



Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC

PostPosted: Mon Jun 08, 2015 7:44 am    Post subject: Questions from my 'annual' Reply with quote

Yes Ralph. I have experienced the peeling of the exterior plating on spark plugs. I continued using the plugs with no known effects. It did make me question the overall quality of the plugs...

Dale Ensing

On Jun 8, 2015, at 11:25, "Ralph E. Capen" <recapen(at)earthlink.net> wrote:

[quote]



I got the answer to one of my questions - the AEL70485 is the correct part number for the intake tube. Still looking to find out where I can get the bulk material that the 69603 part (rubber connecting tube - 1 3/4"ID x 2 3/16"OD x 1 3/4" long) is cut from.

Also still looking to find out if anyone else has experienced their spark plug exterior plating peeling off?!

Thanks,
Ralph Capen



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Dale Ensing
RV-6A
Aero Plantation
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PostPosted: Mon Jun 08, 2015 8:12 am    Post subject: Questions from my 'annual' Reply with quote

Thanks Dale!

I flew two hours yesterday after swapping them upper for lower. In a few months / next time I have the cowl off - I'll look at the ones I put down there...they lived in the plenum nicely...but a different brand (Tempest).

Ralph


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PostPosted: Mon Jun 08, 2015 11:39 am    Post subject: Questions from my 'annual' Reply with quote

Got another of the questions answered....

Found the Mil-Spec hose at SkyGeek and another lister sent a listing for McMaster-Carr

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