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01-13-2022, 07:57 AM
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Join Date: Jun 2008
Location: Madrid, Spain
Posts: 53
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Connecting Rod lubrication
My colleage is worried about the aspect of connecting rod in two rear cylinders (3 and 4). He consider that is not enough lubrication at this point and is proposing me to make a hole in the top (1 or 2 mm) to let the oil fluid there. As I don't understand a lot about and I'm affraid to "touch" this important component of the engine, I would like to know if the gurus of Lycoming can give me their oppinions about. The engine is Lycoming O-320-D1A with 300 hours aprox.
In one of the picture I marked with an arrow the point in which he wants to drill the hole.
https://flic.kr/p/2mX1ogC
https://flic.kr/p/2mWZPmY
Your comments will be very appreciated. Thank you.
Last edited by chiricuca : 01-13-2022 at 08:10 AM.
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01-13-2022, 08:05 AM
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Join Date: Feb 2005
Location: LSGY
Posts: 4,634
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Quote:
Originally Posted by chiricuca
My colleage is worried about the aspect of connecting rod in two rear cylinders (3 and 4). He consider that is not enough lubrication at this point and is proposing me to make a hole in the top (1 or 2 mm) to let the oil fluid there. As I don't understand a lot about and I'm affraid to "touch" this important component of the engine, I would like to know if the gurus of Lycoming can gice me their oppinions about. The engine is Lycoming O-320-D1A with 300 hours aprox.
In one of the picture I marked with an arrow the point in which he wants to drill the hole.
Your comments will be very appreciated. Thank you. |
Hola, no tengo foto... |
01-13-2022, 08:08 AM
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Join Date: Jun 2008
Location: Madrid, Spain
Posts: 53
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Yes. I am fighting to insert them. I will insert the link by the moment. Sorry
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01-13-2022, 08:43 AM
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Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 139
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Oil squirts
From the pictures it looks that the engine is prepared for the mounting of
oil squirts. There is 4 Allen screws, one for each cylinder, that can be removed.
The purpose is to spray oil on the underside of the pistons cooling them.
If you have a high horse power conversion or live in hot climate this can be
a good thing. Note that if you install oil squirts you may have to install
a slightly bigger oil cooler.
Good Luck
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01-13-2022, 09:06 AM
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Join Date: Jun 2008
Location: Madrid, Spain
Posts: 53
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Thank you for all your answers.
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01-13-2022, 11:05 AM
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Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 1,137
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Is he suggesting to drill a hole in the small end of the connecting rod for oil to get into the bushing? I know some automotive engines have a hole there, but there are thousands of Lycoming engines flying around without it, and they don’t seem to fall out of the sky from not having a hole there. I wouldn’t do that.. just put it back together and fly it.
__________________
Tom
Las Vegas
RV-4 flying…
RV-8 empenage finished 10-2020
Wings Started.. 11-2020
Last edited by Taltruda : 01-13-2022 at 11:08 AM.
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01-13-2022, 01:27 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,816
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Is your "colleague" a Lycoming representative? If not, I don't think I would drill the hole.
__________________
Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2022 dues paid 
N16GN flying 1,000 hrs and counting on 91E10; IO360, SDS, WWRV200, Dynon HDX, IFD440, G5
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now. 
Pending Repeat Offender - 10 kit is on order. TDI? Turbine? Stay tuned! 
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01-13-2022, 05:24 PM
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Join Date: Feb 2006
Location: Anywhere, USA
Posts: 1,195
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Quote:
Originally Posted by Taltruda
Is he suggesting to drill a hole in the small end of the connecting rod for oil to get into the bushing? I know some automotive engines have a hole there, but there are thousands of Lycoming engines flying around without it, and they don’t seem to fall out of the sky from not having a hole there. I wouldn’t do that.. just put it back together and fly it.
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X about 5 if I was making decision
__________________
Bruce (BOOMER) Pauley
Kathy (KAT) Pauley
RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930
RETIRED————————-Enjoying life
See you in OSHKOSH
http://www.mykitlog.com/users/index....ley&project=84
=VAF= 2006-2022 DUES PAID
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01-13-2022, 06:42 PM
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Join Date: Nov 2017
Location: Eatonton Georgia
Posts: 694
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No
No Lycoming guru, but no to your question.
__________________
Butch
RV6A Purchased N72TX
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01-14-2022, 03:59 PM
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Join Date: Mar 2018
Location: Buena Park, California
Posts: 780
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This what the oil hole on the automotive connecting rod looks like. I don't know anything about the oil lubrication design but just want to show everyone what your friend wants to do. If your friends engine has high CHT on cylinders 3&4, has he investigated the baffling material, try the DanH #3 cylinder mod? Maybe doing something less drastic first before doing major surgery.
Best of good luck.
__________________
RV8 standard build: 90% completed (90% to go)
Waiting to install wings to fuselage.
Days to Final Installation: 999
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Donation paid through 2022
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