VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.


Go Back   VAF Forums > Main > RV General Discussion/News
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 07-03-2019, 09:23 PM
aero_tango aero_tango is offline
 
Join Date: Feb 2006
Posts: 81
Default Look what I found in the oil screen...

Look what I found in the oil screen...

https://photos.google.com/share/AF1Q...8waGRkZE5pTlF3



I did an oil change today, and as usual, I removed the oil succion screen to inspect for any debris...this is what I found.
Not sure what it is, but it looks like remains from a ball bearing. These 2 large debris stick to a magnet.

Seeking unbiased opinions before I call my engine shop tomorrow. Any idea what this is? Obviously, the aircraft is grounded for now

Background:
O-540 B4B5, freshly overhauled (ONLY 60 hrs since OH)
Engine never missed a beat...runs great.
No large debris found at the first oil change (only two tiny slivers <.100’’ long)
I was running on mineral oil, and was planning to switch to regular oil today...
__________________
Mike (Michel) Roy
C-FZMR RV7A (sold)
Bearhawk in progress...
Gatineau, Qu?bec
Donation paid...

Last edited by aero_tango : 07-03-2019 at 10:04 PM. Reason: Add another link to photo
Reply With Quote
  #2  
Old 07-03-2019, 10:55 PM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 506
Default

Oof... sorry. I am by no means a lycoming expert, but that piece on the left does not look like a ball bearing to me. Looks like some sort of hold down for a tube (oil pick up?).

Do you have any other angles of the chunks?
__________________
Dan Reed
Camas, WA
RV-7A - N167DR
First flight 5/25/2021
Phase 1
2018/19/20 VAF dues paid
Reply With Quote
  #3  
Old 07-03-2019, 11:08 PM
aero_tango aero_tango is offline
 
Join Date: Feb 2006
Posts: 81
Default Maybe magnetos bearing....

I looked at the o-540 part catalogue, and the only ball bearing I found is for the magnetos, PN 67542.
Looks like the ball retainer failed. See link below. It shows actual image of the magneto bearing. The debris found looks like the inner ball retainer.
I? ll contact my engine shop tomorrow, but for sure, the magnetos will come off for inspection.
https://pilotshq.com/lycoming-bearin...42-p-7762.html
Mike.
__________________
Mike (Michel) Roy
C-FZMR RV7A (sold)
Bearhawk in progress...
Gatineau, Qu?bec
Donation paid...
Reply With Quote
  #4  
Old 07-03-2019, 11:49 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,973
Default

I am absolutely sure that neither of those pieces came from ball bearings.

I have no idea what pieces like that would be doing inside an engine.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 700
also
1/4 share in 1959 C-182B (tow plane)
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2020
Reply With Quote
  #5  
Old 07-04-2019, 12:05 AM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
Posts: 2,244
Default

Sure does look like a piece of the bearing cage from the picture posted. Luckily, the mags are easy to pull.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
Reply With Quote
  #6  
Old 07-04-2019, 12:25 AM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 506
Default

That piece on the left is not part of a ball bearing. Can't really tell about the piece on the right.

A bearing inner and outer races would both be concave providing a groove for the ball to run in. Do you have a pic of the inner surface of the part on the right?

The piece on the left appear to have been manufactured to have that bend after the flat. It looks like it was built to hold something round/tubular in place. That protuberance on the left looks like it inserted into something to keep it in place. Any chance this holds the oil pickup tube in place somewhere in the engine?
__________________
Dan Reed
Camas, WA
RV-7A - N167DR
First flight 5/25/2021
Phase 1
2018/19/20 VAF dues paid
Reply With Quote
  #7  
Old 07-04-2019, 12:26 AM
SHIPCHIEF SHIPCHIEF is offline
 
Join Date: Mar 2008
Location: Seattle
Posts: 1,412
Default

That looks like some kind of a tube clamp. It broke and fell apart to the sump. I wonder, is this an older engine with the steel oil pickup tube?
I'm in the process of replacing a cracked motor mount on my wife's RV-4. The engine is off, so I'm going to remove the oil pan to inspect for damage & clean the crud that always collects in the sump. It's about 1300 SMOH so it deserves a look.
I'm also going to remove the accessory case because a couple of my Akro friends have found sheared crank gear bolts...who knows how many 'secret' prop strikes occurred before we got this plane? Also, it's worth checking the oil pump for the latest configuration, and the condition of the gear train.
C'mon, it's only got one engine!
__________________
Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is nothing-absolute nothing-half so much worth doing as simply messing around with Aeroplanes
(with apologies to Ratty)
2019
Reply With Quote
  #8  
Old 07-04-2019, 12:27 AM
thorpdrvr thorpdrvr is offline
 
Join Date: Dec 2009
Location: San Antonio, TX
Posts: 20
Default

Agree. Sure looks like a piece of ball bearing cage to me. Mag inspection will tell the story. If mag is culprit, doubt any internal damage done. Something that big just falls to bottom of sump and may get thrown around a little on the way down and may cause a few nicks on internal case, but little chance of serious damage. Of course, no way to know without pulling sump, accessory case, and a cylinder or two. If mag bearing, I would fix mag and keep running with a few closely spaced oil changes to check for metal and also check accessory gears for damage with inspection camera.
Reply With Quote
  #9  
Old 07-04-2019, 12:40 AM
Mike S's Avatar
Mike S Mike S is online now
Senior Curmudgeon
 
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 16,107
Default

Quote:
Originally Posted by dreed View Post
That piece on the left is not part of a ball bearing. Can't really tell about the piece on the right.
Are you sure??

Looks like the spider that keeps the balls in place.

__________________
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Reply With Quote
  #10  
Old 07-04-2019, 01:36 AM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 506
Default

Quote:
Originally Posted by Mike S View Post
Are you sure??

Looks like the spider that keeps the balls in place.

Ya know- it sure does. I'll admit stupidity here too- I wasn't really paying attention to the scale of the chunks but I bet you guys are right.

Now... to find all 8 balls and the rest of the pieces. Hopefully all still captive in the mag.
__________________
Dan Reed
Camas, WA
RV-7A - N167DR
First flight 5/25/2021
Phase 1
2018/19/20 VAF dues paid
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 10:51 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.