Today's Message Index:
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0. 04:14 AM - PLEASE READ - Matronics Email List 2018 Fund Raiser During November! (Matt Dralle)
1. 05:29 PM - Ford Oil Leaks and Seals (John C Black)
2. 08:22 PM - Re: Ford Oil Leaks and Seals (taildrags)
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| Subject: | PLEASE READ - Matronics Email List 2018 Fund Raiser During |
November!
Dear Listers,
Each November I hold a PBS-like fund raiser to support the continued operation
and upgrade of the Email List and Fourm Services at Matronics. It's solely through
the Contributions of List members (you) that these Matronics Lists are possible.
You have probably noticed that there are no banner ads or pop-up windows on any of the Matronics Lists or related web sites such as the Forums site http://forums.matronics.com , Wiki site http://wiki.matronics.com , or other related pages such as the List Search Engine http://www.matronics.com/search , List Browse http://www.matronics.com/listbrowse , etc. This is because I believe in a List experience that is completely about the sport we all enjoy - namely Airplanes and not about annoying advertisements.
During the month of November I will be sending out List messages every couple of
days reminding everyone that the Fund Raiser is underway. I ask for your patience
and understanding during the Fund Raiser and throughout these regular messages.
The Fund Raiser is only financial support mechanism I have to pay all
of the bills associated with running these lists. YOUR personal Contribution
counts!
This year we have a really HUGE and TERRIFIC line up of free gifts to go along
with the various Contribution levels. In fact, there are 9 great gifts to choose
from! There's something for everyone, to be sure.
Please make your List Contribution using any one of three secure methods including
using a Credit Card, PayPal, or by Personal Check. All three methods afford
you the opportunity to select one of this year's free gifts with a qualifying
Contribution amount!!
To make your Contribution, please visit the secure web site:
http://www.matronics.com/contribution
I would like to thank everyone in advance for their generous financial AND moral
support over the years!
Thank you!
Matt Dralle
Matronics Email List Administrator
RV-4/RV-6/RV-8 Builder/Rebuilder/Pilot
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| Subject: | Ford Oil Leaks and Seals |
Hi,
I am rebuilding a Model B engine for my Pietenpol.
Every Model A/B that I know about leaks oil at the rear oil seal.
I am thinking of using a modern rear oil seal like the small block Chevrolet V-8
kit that Dan McEachern offers for Model A/B's.
Has anyone used a moden rear oil seal ? Did it stop the oil leaks ?
Any guidance is appreciated.
John
La Conner, WA
Message 2
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| Subject: | Re: Ford Oil Leaks and Seals |
John; I know nothing about the Ford A/B engines or how their seals are configured
but I do have some experience with oil seal leaks at the front main seal (propeller
end) of my Continental A75. The leaking occurred after a complete overhaul
of the engine, including sending the crank off to Aircraft Specialties
Services or someplace like that for a complete reconditioning. Once I traced
the source of the leak, I ordered a new seal and it came with instructions...
Continental Service Bulletin M76-4, attached. I determined that my crank had
not been prepared as per the service bulletin, in that the plating had not been
polished off in the area that the seal contacts, nor had the helical 'scratches'
been made on the area in question. Apparently, the helical scratches impart
a screwing motion that "screws" the oil back behind the seal as the engine
runs. When the engine is sitting and the oil is cold, it's thick enough where
it doesn't tend to leak past the seal but when it's warm and under pressure
is when it wants to seep out and the screwing effect helps. My engine now runs
bone-dry at the seal.
This may be completely contrary to Ford engine practice and small-block Chevy engine
practice, but it has worked on my Continental and it probably turns roughly
the same RPM as a Ford, if that matters. I offer this only as food for thought,
and am also wondering if anyone out there has tried this crank prep technique
for a Ford rear seal.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=484237#484237
Attachments:
http://forums.matronics.com//files/continentalsb_m76_4_453.pdf
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