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Questions from my 'annual'

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

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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recapen(at)earthlink.net
Guest

Posted: Mon Jun 08, 2015 7:26 am Post subject: Questions from my 'annual'

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

Posted: Mon Jun 08, 2015 7:44 am Post subject: Questions from my 'annual'

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
Weddington NC

recapen(at)earthlink.net
Guest

Posted: Mon Jun 08, 2015 8:12 am Post subject: Questions from my 'annual'

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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recapen(at)earthlink.net
Guest

Posted: Mon Jun 08, 2015 11:39 am Post subject: Questions from my 'annual'

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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