Thorp Air Command - T18.net

Supporting Owners, Builders and Pilots of the Thorp T-18 and its variants.
It is currently Mon Oct 16, 2017 10:44 pm

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 11 posts ] 
Author Message
Ryan Allen
PostPosted: Sat Sep 30, 2017 11:54 am 
Sr. Member
Sr. Member
User avatar

Joined: Wed Oct 21, 2009 6:10 pm
Posts: 668
Images: 1
Location: Louisiana
There is always a lot of grit found in my oil filter when I send it in for oil analysis. I cant find anywhere that I think unfiltered air is getting into the system. Only other thing is I would think is that I would need to try a different air filter. Any other suggestions as to how to lower the amount of grit being found?


Top
 Profile Personal album  
 
Rich Brazell
PostPosted: Sat Sep 30, 2017 2:14 pm 
Hero Member
Hero Member

Joined: Wed Oct 21, 2009 12:33 pm
Posts: 2751
Images: 64
Location: Jamul, CA (San Diego area)
Is it solid "grit" like pieces of sand or is it black granules that can be crushed when put between your fingers ? :o If it is black and can be crushed it may just be carbon deposits from combustion . Exactly what are the oil guys saying it is ? ??? I used the disposable foam infused with some type of oil from ACS for my air filter . :P What filter are you using now ?

RB O0


Top
 Profile Personal album  
 
Ryan Allen
PostPosted: Sun Oct 01, 2017 9:08 am 
Sr. Member
Sr. Member
User avatar

Joined: Wed Oct 21, 2009 6:10 pm
Posts: 668
Images: 1
Location: Louisiana
When I cut my own open, it doesn't look black like carbon. I do notice some grit (like sand or dirt), but it doesn't worry me when looking at it. When I send the filter into Avlab for analysis, they always come back with "Major Grit" found. I use a Wix brand filter. I guess it would be worth a try to use another brand. Im just wondering if Im missing something obvious thats allowing the dirt/grit into the system which is being caught by my filter.

Attachment:
WIX filter.jpeg
WIX filter.jpeg [ 981.46 KiB | Viewed 193 times ]


Top
 Profile Personal album  
 
jrevens
PostPosted: Sun Oct 01, 2017 11:02 am 
Sr. Member
Sr. Member
User avatar

Joined: Thu Oct 22, 2009 10:13 pm
Posts: 663
Location: USA
Hey Ryan,

Are you talking about sending your air filter into a lab for analysis (shown in the picture), or your oil filter. And surely you're not sending the whole oil filter in - just an oil sample, right? Do you fly from a dirt strip?

_________________
John Evens
Arvada, Colorado

T-18 N71JE
Kitfox 7 SS N27JE (building)


Top
 Profile  
 
Rich Brazell
PostPosted: Sun Oct 01, 2017 11:55 am 
Hero Member
Hero Member

Joined: Wed Oct 21, 2009 12:33 pm
Posts: 2751
Images: 64
Location: Jamul, CA (San Diego area)
I thought you were talking oil filter and don't call me Surely . ??? If it is the air filter is it possible that it is not sealing correctly in the housing ? :o

RB O0


Top
 Profile Personal album  
 
fytrplt
PostPosted: Sun Oct 01, 2017 2:11 pm 
Sr. Member
Sr. Member
User avatar

Joined: Tue Oct 20, 2009 8:07 pm
Posts: 747
Images: 2
Location: Lakeland, Florida, USA
Carb heat air leak?

_________________
Bob Highley
N711SH
SN 835
KLAL


Top
 Profile Personal album  
 
Jeff J
PostPosted: Sun Oct 01, 2017 2:15 pm 
Sr. Member
Sr. Member

Joined: Wed Aug 31, 2016 8:18 am
Posts: 241
Images: 0
Location: eastern OK
Proper fit of the air filter in the housing was the first thing that came to my mind when I saw what is being used. I have seen that style of filter siliconed top and bottom because of improper fit (loose). Carb heat boxes are rarely tight and provide unfiltered air if on.

I would think the analysis shop could tell what the "grit" is. Grit could be anything from carbon to sandblasting media or even metal filings.

_________________
"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


Top
 Profile Personal album  
 
Ryan Allen
PostPosted: Sun Oct 01, 2017 4:42 pm 
Sr. Member
Sr. Member
User avatar

Joined: Wed Oct 21, 2009 6:10 pm
Posts: 668
Images: 1
Location: Louisiana
Sorry for the confusion. I am talking about the results of my oil filter analysis. I have called Avlab about what "grit" means, and although I cant recall exactly what they said now, I came away with the understanding that it was basically dirt. I was thinking that the only way grit could be getting in was around a poor fitting air filter (and now I'll check the carb heat box too). I only fly off paved runways.

I just wanted to bounce it off everyone in case I was missing something obvious.


Top
 Profile Personal album  
 
Ryan Allen
PostPosted: Thu Oct 05, 2017 4:15 pm 
Sr. Member
Sr. Member
User avatar

Joined: Wed Oct 21, 2009 6:10 pm
Posts: 668
Images: 1
Location: Louisiana
well, I called Avlab today to reinforce my understanding of what "major grit" was and what they considered "grit"......and I am glad I did. Apparently, when they say "major grit" was found in my oil filter, that is a good thing, and it means my filter is doing its job really well. Grit is defined as anything that is caught by the filter. I hope that may help somebody understand their filter analysis in the future.


Top
 Profile Personal album  
 
Jeff J
PostPosted: Thu Oct 05, 2017 4:31 pm 
Sr. Member
Sr. Member

Joined: Wed Aug 31, 2016 8:18 am
Posts: 241
Images: 0
Location: eastern OK
I am glad to hear you didn't have a problem that needed fixing.

_________________
"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


Top
 Profile Personal album  
 
Rich Brazell
PostPosted: Thu Oct 05, 2017 5:27 pm 
Hero Member
Hero Member

Joined: Wed Oct 21, 2009 12:33 pm
Posts: 2751
Images: 64
Location: Jamul, CA (San Diego area)
Ryan : Did you find my lucky penny in that filter ? ???

RB O0


Top
 Profile Personal album  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron