Home > VansAirForceForums

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

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

Old 04-19-2012, 11:18 PM
leaker311 leaker311 is offline
Join Date: Aug 2009
Location: texas
Posts: 68
Default Lint in fuel filter

Today I cleaned the servo inlet filter and to my surprise I found what looks exactly like the lint you find in the screen of the dryer at home.
It was a pea size ball of cotton looking stuff.

I am going through the whole system to make sure that there are no surprises and to try and figure out where it came from.
I know it can come from anywhere but I was just wondering if someone out there has seen this before so i can target my efforts.

thanks in advance!

Reply With Quote
Old 04-20-2012, 12:43 AM
RV10inOz's Avatar
RV10inOz RV10inOz is offline
Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,308

We found some like that in the screen at the fuel pump.....Can only assume it comes from the wing tanks when they get built.

After about 30,000 litres of AVGAS through our machine I still get bits of swarth in the fuel drains......Beats me how there can be any left in there
Reply With Quote
Old 04-20-2012, 05:26 AM
noelf noelf is offline
Join Date: Nov 2007
Location: Solomons, MD.
Posts: 1,258

Not uncommon to find this in the gascolator screen also. I have no idea how it gets there. There were some post some time ago with photos that showed exactly what I found in my gascolator. I thought it might be spider web material, but could not positively figure it out.
Reply With Quote
Old 04-20-2012, 09:26 AM
sahrens's Avatar
sahrens sahrens is offline
Join Date: Jan 2007
Location: Battle Ground
Posts: 534
Default Fuel tanks

I have heard folks are finding fibers in fuel filters and believe it is coming from the newer non-metal fuel storage tanks. It seems like the filters at the tanks would take care of it.
RV-7 N818BG (flying)
Bearhawk Patrol (building)
RV-7 (resurrecting)
Reply With Quote
Old 04-20-2012, 09:40 AM
airguy's Avatar
airguy airguy is offline
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,590

Perhaps from the fuel filters at the FBO coming apart?
Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2021 dues paid
N16GN flying 900 hrs and counting; 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.
Reply With Quote
Old 04-20-2012, 10:11 AM
johngoodman's Avatar
johngoodman johngoodman is offline
Join Date: Feb 2006
Location: Peachtree City, Georgia
Posts: 440

I found the same thing in my in-line filters after my first 25 hours. It was a very fine thread that couldn't be called white, but not quite gray or tan. I collected it in a small ziploc to figure it out. In the meantime, I switched from ethanol based high test to 100LL - I was testing different fuels during my 40 hours - yes, I have an auto conversion.
Eventually, I found a nearby gas station that sold 90 octane ethanol-free gas. I started using that, but saw something very interesting at the gas station. The owner had done a "phase separation" test in a jar of ethanol gas. The short story is that the water saturated alcohol was at the bottom, the gas at the top, and a strange layer of tiny little beads of amber mixed with little hairs between. The beads of amber turned out to be corn syrup, but the little hairs (just like mine) were corn silks that had been chopped up. I think it's safe to assume that they only distill the corn cob slurry once, and that a few things might get caught up in the path.

So, my amateur observations lead to a suspicion that your threads/fibers are also corn silk. If so, how?

John Goodman - 40572
First flight was 25 June, 2011
Reply With Quote
Old 04-20-2012, 10:19 AM
Kyle Boatright Kyle Boatright is offline
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,671

My airplane had red lint in the gascolator screen the first time I cleaned it. I assumed it came from the red shop towels I was using when I built the tanks.

It was a one time event.
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
Reply With Quote
Old 04-20-2012, 11:52 AM
Peetie the Pilot Peetie the Pilot is offline
Join Date: Jan 2005
Location: Windsor,Ontario,Canada
Posts: 51

I have heard about these fine fibers coming from storage tanks in the ground. We have experienced this at our fueling facility. Not sure where exactly it is coming from or how it gets there

Reply With Quote
Old 04-20-2012, 04:46 PM
Don at Airflow Don at Airflow is offline
Join Date: Jun 2006
Posts: 316

Fuel filters from fuel trucks.
Reply With Quote
Old 04-20-2012, 11:26 PM
Peterk Peterk is offline
Join Date: Mar 2008
Location: Texas
Posts: 1,378

scotchbrite dust?
Reply With Quote

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 08:24 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.