leaking air filter, casting defect - Victory Forums - Victory Motorcycle Forum
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post #1 of 16 (permalink) Old 01-14-2015, 11:33 PM Thread Starter
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Default leaking air filter, casting defect

Got my first oil analyisis back from Blackstone Lab on my XC.


In the notes it said that the silicon was high and it was possible that dirt was getting past the air filter. I figured I should check it out. So this evening I did.
Pulled the filter and everything looked good. It seemed to fit correctly, clamp down well etc. It is a Vic stage 1 reusable. Sort of a K&N knockoff. Then I found a some sand on the shelf behind the air cleaner. Not a lot but some. Which was much more than I wanted to find!

Everything looked OK till I felt the surface of where the air cleaner seats down at the very bottom, near the center of the frame. Right below the pencil point in this picture. On the cast surface that the filter seats on there is a defect, a low spot where the casting did not fill completely in the mold?

This defect is narrow and deep enough that it provides a path for dirt to enter the engine on my particular bike. The filter's rubber seal is actually larger there, kind of bulges out in the center and the there is a depression for this larger part of the filter's rubber seal to set in, right in the center of the frame. The defect is too narrow and deep for the rubber of the filter seal to conform to and some dirt is getting by.
I cleaned the few grains of sand out before I thought to take that picture.

If you have an X bike you might want to inspect this area of filter contact next time you clean or replace your filter.
I filled the divot in with shoe goop after I took the picture. That should take care of the deep spot. When I install the filter this time I will grease the sealing edges with high temp grease to help trap the dirt. Hopefully that will end the problem.

Just a heads up for others. Might want to feel your's for a similar defect when you have your filter out. Everything is the same color and it's an unfinished casting where the filter sets. It's hard to see any defects.

presently owned bikes
2014 XC 8 ball that no longer stalls
1993 HD fxrp
1982 HD Sturgis
2009 Honda rebel
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Last edited by Joe_; 01-14-2015 at 11:57 PM.
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post #2 of 16 (permalink) Old 01-15-2015, 05:49 AM
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Are bikes have about the same mileage on the Motor and sample and my numbers are a lot hire. The flash point of your oil is quite abit hire than mine, I realize that every engine is different, but there's way to much difference in the reports, makes me wonder how accurate BS is, Polly wont use them again....
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2013 XCT, Red,
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post #3 of 16 (permalink) Old 01-15-2015, 05:55 AM
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Thanks for posting that pic of the air box area...

2013 XCT, Red,
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Wheel @ +4, Kuryakyn Shift/Brake Pegs, o2s Disabled.
Utopia Backrest. KewlMetal Heal Shifter with Kuryakyn pegs ..
Lubrication Provided By Amsoil..

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post #4 of 16 (permalink) Old 01-15-2015, 06:16 AM
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Over 2 years owning my XR and still have not took the tank off! I am coming up on 10K miles, should hit it in the early summer so I will be taking my tank off to replace my filter and will check it out.

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post #5 of 16 (permalink) Old 01-15-2015, 11:36 AM
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Joe
If you still have stock filter compare the two to see if there is a difference. Put the stock filter on the bike and look to see if the sealing of the filter is better. The k/n will not really give you that much more power so maybe stock will be better

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post #6 of 16 (permalink) Old 01-15-2015, 12:51 PM Thread Starter
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Quote:
Originally Posted by Weeds View Post
Are bikes have about the same mileage on the Motor and sample and my numbers are a lot hire. The flash point of your oil is quite abit hire than mine, I realize that every engine is different, but there's way to much difference in the reports, makes me wonder how accurate BS is, Polly wont use them again....
You are also running a complete synthetic which is sort of an apples and oranges comparison on the analysis. Yeah they are both fruit.... I have a pretty extensive backround in precision hydraulics and so are pretty familiar with oil analysis but not on motorcycles.
Some of it crosses over though.
Every machine is different. The most important thing is to send in a few samples for a baseline. Also it helps you establish how long to go between oil changes on the particular oil you are using in that particular engine or machine. Plus it will hopefully spot gross problems like my leaking air filter. I wouldn't be too spooked about the numbers being different since the oils are completely different. Just as long as the chemist isn't spooked who is doing the analysis, and he will tell you if he is, all is good.
In the 80's I was told that in a single barrel oil there was at least a couple of 100lbs of additives. It was a much larger number than I expected. Don't quote me cause I have selective memory and CRS both.. Just ask the wife. The number was very big considering it went into a motor and the thing ran fine on it.

Oil is chemical soup and chicken soup has different ingredients than beef noodle. Synthetic doesn't really have much in common with Dino oil except they both work pretty well at lubricating motors.

Looks like your air cleaner element sealed up just fine. Your silicon is lower and there is no note about a possible leak like in mine. Life is good!

Quote:
Originally Posted by TNXR View Post
Over 2 years owning my XR and still have not took the tank off! I am coming up on 10K miles, should hit it in the early summer so I will be taking my tank off to replace my filter and will check it out.
I just looked at the OL's and hers is the same as mine. Same divot
You can see where the dirt has migrated past the bottom of the filter seal. I'll post some pictures later when I get a chance if they come out. So you might want to take a look. I am going to start greasing the bottom of the sealing surface now that I have filled in the divot just to be certain that there is no more dirt migration.
We live on a dirt road so keeping dirt from getting past the air filter is really important to the lives of our vehicles. Luckily we didn't get much riding in this year due to my warranty issues and her getting hurt twice.

Quote:
Originally Posted by visionjohnny View Post
Joe
If you still have stock filter compare the two to see if there is a difference. Put the stock filter on the bike and look to see if the sealing of the filter is better. The k/n will not really give you that much more power so maybe stock will be better
I'll bet you are correct.
Unfortunately I'm not home, no stock filter here. . They definitely have a different seal on them. Can't check though.

But I got to hand it to you, you were right that the K&N style filters that Vic sells pass more dirt on a ViC. That is something you said before in a post and having used them for years didn't believe you because normally it is just the opposite on a k&N as long as you don't constantly clean it.
In this case the dirt is coming under the filter because of the design of the frame and the under filling of the casting at that one point. Just confirmed it on the Ol's bike, pictures later if it shows up.

A layer of grease should completely solve it once the shoe goo that I put in the divot on her's at the center core line sets up.

EDIT : You couldn't see the defect very well so I just posted the picture of the dirty filter seal in a post later in the thread.

presently owned bikes
2014 XC 8 ball that no longer stalls
1993 HD fxrp
1982 HD Sturgis
2009 Honda rebel
co owner
1991 gl1500 A w/ Champion Daytona 2+2 sidecar.
"God works both good and evil in a mans' life and you deal with it as best you can" Somebody..

Last edited by Joe_; 01-16-2015 at 01:00 AM.
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post #7 of 16 (permalink) Old 01-15-2015, 12:53 PM
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I have always wondered this myself, all that sand, bugs etc on the other side of the filter at least in cars. I keep all my cars until they die so is it that big of a deal? Logic tells me that sand etc going into the combustion chamber can't be good but it is always my transmission not the engine that usually dies first.

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post #8 of 16 (permalink) Old 01-15-2015, 02:09 PM
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Excellent catch, Joe. I'm sure a lot others will be looking for this defect you've discovered.

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post #9 of 16 (permalink) Old 01-15-2015, 02:13 PM
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All this just sounds like a good excuse to get the Lloydz filter if you ask me.

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post #10 of 16 (permalink) Old 01-15-2015, 05:39 PM
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Joe
like the grease idea good thinking

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