|
-
POSTING RULES
-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|
12-19-2015, 10:23 PM
|
 |
|
|
Join Date: Jan 2008
Location: Atlanta, GA
Posts: 240
|
|
blue piston skirts?
anyone ever seen anything like this before? All four pistons have blue skirts. I'm not sure if they were blue going in, or if they somehow became blue during operation, but this is not something I've ever seen!
__________________
Ian
|
12-20-2015, 05:53 AM
|
 |
|
|
Join Date: Oct 2005
Location: 08A
Posts: 9,477
|
|
Bottom side and top side skirts?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
|
12-20-2015, 06:07 AM
|
|
|
|
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,208
|
|
Ian, is that fuel residue? Have you tried wiping it off with a solvent soaked rag?
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
|
12-20-2015, 01:20 PM
|
|
|
|
Join Date: Jan 2008
Location: Atlanta, GA
Posts: 240
|
|
It's on the top and bottom, yes. Almost looks like the whole skirt was blue all the way around and it wore in some spots, and got covered up with brown around the pin holes
__________________
Ian
|
12-20-2015, 06:54 PM
|
|
|
|
Join Date: Mar 2008
Location: houston, texas
Posts: 900
|
|
Question?
Do you run 100LL and what was the compression level when you removed the jugs?
|
12-20-2015, 08:04 PM
|
|
|
|
Join Date: Jan 2008
Location: Atlanta, GA
Posts: 240
|
|
I haven't ever run this engine. In fact, I believe the last time it ran was 1992.
__________________
Ian
|
12-20-2015, 08:48 PM
|
|
|
|
Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
|
|
Blue
Quote:
Originally Posted by tmbg
I haven't ever run this engine. In fact, I believe the last time it ran was 1992.
|
Lycoming version of blue balls ??
__________________
Rv8
N 666 TA
First Flight 2-3-2015 🚀
2017 donation paid
|
12-21-2015, 01:44 AM
|
|
|
|
Join Date: May 2010
Location: Benaraby Queensland. Australia
Posts: 209
|
|
Not commenting on the blue colour, but are you happy with the condition of the top ring land. I have seen that sort of condition on pistons from detonating cylinders.
Some slight scuff marks, but it doesn't look bad.
|
12-22-2015, 07:55 AM
|
|
|
|
Join Date: Mar 2008
Location: houston, texas
Posts: 900
|
|
Suspect
There is a reason I asked the question above and it is, that in looking at this piston and it's condition. I would have to think it has been running for some time with Hi-blow-by. The wear pattern at the top of the piston, inline with the skit 90* to the wrist-pin line and the skit below that angle shows a lot of blow-by and looks as if it were running for some time in that state. The color of the blue on the skirt is the color of the die in 100LL. It would make me guess that the 100LL that blew-by the rings and onto the skirt would dry there and accumulate over the time from when the blow-by started tell this engine was shut down and you found it there. Just me guessing from a picture and no testing. Yours as always, R.E.A. III #80888
Last edited by Robert Anglin : 12-22-2015 at 07:59 AM.
|
12-22-2015, 01:00 PM
|
|
|
|
Join Date: Jan 2008
Location: Atlanta, GA
Posts: 240
|
|
Thanks for the ideas guys!
This engine is getting torn down due to cam corrosion, but the blue piston thing was a new one for me, and everyone I've shown it to as well.
__________________
Ian
|
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 09:58 PM.
|
Linear Mode
