|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

12-31-2015, 07:03 AM
|
|
Super Moderator
|
|
Join Date: May 2005
Location: Locust Grove, GA
Posts: 2,627
|
|
Check those oil screens
I come across many RV's whose operators forget to check the oil screen on the engine. It should be checked at least once per year during the annual or whenever the internal health of the engine is in question. Here is a picture of one I removed from an RV10 yesterday that should drive the message home. IO-540 with 10:1 pistons and only 600 hours. I don't know when the screen was last checked, but clearly there is lots of blowby. All of the chunks were carbon, the screen was about 50% blocked, with one cylinder at 48/80 and 54/80 and all of the leakage going by the rings.

__________________
 Vic Syracuse
Built RV-4, RV-6, 2-RV-10's, RV-7A, RV-8, Prescott Pusher, Kitfox Model II, Kitfox Speedster, Kitfox 7 Super Sport, Just Superstol, DAR, A&P/IA, EAA Tech Counselor/Flight Advisor, CFII-ASMEL/ASES
Kitplanes "Unairworthy" monthly feature
EAA Sport Aviation "Checkpoints" column
EAA Homebuilt Council Chair/member EAA BOD
Author "Pre-Buy Guide for Amateur-Built Aircraft"
www.Baselegaviation.com
Last edited by vic syracuse : 01-01-2016 at 07:23 AM.
Reason: spelling
|

12-31-2015, 08:04 AM
|
|
|
|
Join Date: Sep 2007
Location: Central IL
Posts: 5,516
|
|
Vic, Did that engine have piston cooling jets? I have been wondering about exactly where that forms in the engine. I assume it has electronic ignition too?
Thanks.
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
|

12-31-2015, 08:12 AM
|
 |
|
|
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
|
|
WHAT is in there?
__________________
7A Slider, EFII Angle 360, CS, SJ.
|

12-31-2015, 08:37 AM
|
|
Super Moderator
|
|
Join Date: May 2005
Location: Locust Grove, GA
Posts: 2,627
|
|
Carbon
They are chunks of carbon from excessive blowby. I don't know if it has piston cooling jets. It could, as it is a Lycon supposedly rated at 317 HP (10:1) pistons.
I have seen small bits of carbon in other oil screens and in oil filters, but none ever this large or in such a large volume.
Vic
__________________
 Vic Syracuse
Built RV-4, RV-6, 2-RV-10's, RV-7A, RV-8, Prescott Pusher, Kitfox Model II, Kitfox Speedster, Kitfox 7 Super Sport, Just Superstol, DAR, A&P/IA, EAA Tech Counselor/Flight Advisor, CFII-ASMEL/ASES
Kitplanes "Unairworthy" monthly feature
EAA Sport Aviation "Checkpoints" column
EAA Homebuilt Council Chair/member EAA BOD
Author "Pre-Buy Guide for Amateur-Built Aircraft"
www.Baselegaviation.com
|

12-31-2015, 08:44 AM
|
 |
|
|
Join Date: Jul 2009
Location: Mojave
Posts: 4,652
|
|
Ive seen one or two of those carbon chunks in my time, but that looks like the inside of a rock tumbler.
I also remove and inspect that screen at every oil change.
It seems funny to me that people take the time to cut open an oil filter, fan out the media and inspect for tiny slivers of material, yet ignore this "pre filter".
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
Last edited by Toobuilder : 12-31-2015 at 08:47 AM.
|

12-31-2015, 09:33 AM
|
|
|
|
Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,544
|
|
Vince, what brand of cylinders were they?
__________________
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
|

12-31-2015, 09:56 AM
|
|
Super Moderator
|
|
Join Date: May 2005
Location: Locust Grove, GA
Posts: 2,627
|
|
Titan
They are Titan's.
__________________
 Vic Syracuse
Built RV-4, RV-6, 2-RV-10's, RV-7A, RV-8, Prescott Pusher, Kitfox Model II, Kitfox Speedster, Kitfox 7 Super Sport, Just Superstol, DAR, A&P/IA, EAA Tech Counselor/Flight Advisor, CFII-ASMEL/ASES
Kitplanes "Unairworthy" monthly feature
EAA Sport Aviation "Checkpoints" column
EAA Homebuilt Council Chair/member EAA BOD
Author "Pre-Buy Guide for Amateur-Built Aircraft"
www.Baselegaviation.com
|

12-31-2015, 10:19 AM
|
|
|
|
Join Date: Feb 2007
Location: San Diego, CA
Posts: 1,670
|
|
And the wheel goes 'round and 'round
__________________
Pete Hunt, [San Diego] VAF #1069
RV-6, RV-6A, T-6G
ATP, CFII, A&P
2020 Donation+, Gladly Sent
|

12-31-2015, 10:49 AM
|
 |
|
|
Join Date: Dec 2006
Location: Sumner, WA
Posts: 722
|
|
I check my screen at every oil change. It only ads about 10 minutes and 1 crush washer to the job.
This last oil change I found a small piece of cork gasket from when I changed my valve cover gaskets. I was super careful scraping the old gaskets off but I obviously missed seeing this small piece fall in.
__________________
Jeff Bloomquist
Sumner, WA
PP-ASEL, IR
RV-7A
Flying
1150 Hours
|

12-31-2015, 11:04 AM
|
 |
|
|
Join Date: Feb 2007
Location: Sutter Creek, CA
Posts: 842
|
|
Lycoming SI
In addition to excellent advice already stated by Vic, I wanted to point out that Lycoming SI 480E addresses checking the suction screen.
As I seem to be not clever enough to post the .pdf link, I have added the germane section. There is more info included in the document.
I. Oil and Filter Change and Screen Cleaning.
A. At 25 hours after the first replacement/screen cleaning – oil change, filter replacement or pressure screen cleaning and oil sump suction screen check for new, remanufactured or newly overhauled engines and for engines with any newly installed cylinders.
B. 25-Hour interval – oil change, pressure screen cleaning, and oil sump suction screen check for all engines employing a pressure screen system.
C. 50-Hour interval – oil change and oil filter replacement and suction screen check for all engines using full-flow filtration system (except for engine models TIO-540-AF1A and -AF1B, which require 25 hour interval changes).
D. A total of four (4) months maximum between changes for systems listed under “A”, “B” and “C”.
__________________
Mark Ohlau
RV-6 N506MM VAF #1410
2017 Donation Made
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 08:13 AM.
|