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Old 10-04-2013, 09:25 PM   #1
Full Power OP
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External, Inline Fuel Filter

There was a very long thread, in which a RTW traveller, deep in the bush, frequently fueling his F800 from roadside vendors selling petrol in 2 liter ex-beverage containers finally suffered from fuel pump failure AND co-incident fuel filter blockage..
Fuel pumps are now cheap, readily sourced, and easy to carry as spare.
.... My question is:
What is the preferred and easily found, one piece, metal canister inline fuel filter, with 6mm or 1/4 inch hose barbs, rated 50 PSI + and 5 microns absolute , suitable for the BMW fuel injection use ?
.
My intent is to replace, and remount the filter canister OUTSIDE the fuel tank, in the unused space just behind the fuel injectors.
.
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Old 10-04-2013, 10:50 PM   #2
GoneAgain
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thats my 'intent' too..........


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Old 10-05-2013, 12:00 AM   #3
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This should be very interesting! I'm in!
Oh and could the next guy who does it make a "step by step" photo journal? pretty pretty please!
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Old 10-05-2013, 06:10 AM   #4
JRWooden
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Did you see the babbling here:

http://advrider.com/forums/showthread.php?t=834239

and..........

http://www.advrider.com/forums/showthread.php?t=854479
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Old 10-05-2013, 11:21 AM   #5
Full Power OP
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Yes, read through MANY pages of those threads.
I have a spare Fuel pump, in stock from the HighFlow people.
Got that part covered.
Now I am looking to source a ( few ) one piece, metal case 5 micron inline fuel filter(s) , with 1/4 inch hose barbs.
Similar to the MAHLE KL315.

The following characteristics are NOT acceptable:
glass or plastic case
multiple piece design
absolute micron filtration GREATER than 5 microns.
thread adaptors to hose barb.
oversize hose barb connections greater than 6mm.
miniaturized case, smaller than stock F800 filter.
.
.
Should be something out there on the market.
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Old 10-05-2013, 01:17 PM   #6
dpm
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Not quite 5 micron, but look at WIX 33031 or equivalents.


better option might be Mann WK43/8?
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Old 10-05-2013, 01:59 PM   #7
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WIX 33031= CARQUEST 86031... only 4 bucks local.
steel case, 1/4 hose barb, inline fuel filter.
12 micron
60 PSI burst.
We are getting closer, likely work in a pinch, and cheap enough.
Still searching for smaller micron rating.
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Old 10-05-2013, 03:27 PM   #8
Camel ADV
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Not sure of the micron rating but a filter from a 800/1000cc Can-Am ATVs should be close to what you're after.

Cory
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Old 10-06-2013, 11:20 PM   #9
Snowy
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So with 60,000kms on the FGS I read this and went and pulled my fuel filter out and back flushed.

Nothing. Not a drop of fuel would pass through it under gravity. Wiped the outlet clean and put lips to it and blew through.

Oh dear.

It took more than a dozen fill, shake, wipe and blow before the resistance to flow dropped. The amount of fine dirt that came out was staggering.

It still runs the same. Meh.

The prefilter was sitting in the bottom of the tank when i lifted the pump assembly high enough to see in. Not sure if I knocked it off or if it was already off. But it was completely clean.

Strange design. Can't figure why you'd build one like this.

So we're positive that a replacement filter isn't available?
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Old 10-07-2013, 12:52 AM   #10
GoneAgain
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Quote:
Originally Posted by Full Power View Post

The following characteristics are NOT acceptable:
plastic case

so why no plastic case..? i havent started looking yet.. (and prob wont till christmas..) but i was thinking a clear plastic one so i could see when it needed changing.. you concerned it wont handle the presure?


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Old 10-07-2013, 01:06 AM   #11
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Prefer a metal canister for durability.
Nice if it is rated for fuel injection type pressures as well.
( What is our fuel line pressure typically ??)
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Old 10-07-2013, 01:44 AM   #12
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( What is our fuel line pressure typically ??)
no idea... BUT

when mine was playing up, on the computer (at dealer), it was showing around 2 bar when idling ok, and down to .1 bar when she was about to cut out...

2 bar is about 30 PSI... not sure how much hihgher (if any?) she gets under load...

.
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Old 10-07-2013, 02:57 AM   #13
Snowy
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I used a piece of old towel when blowing the filter out. The terry towelling was catching and hiding most of the crap. The toilet paper on the left had one flush blown on it.

This is only the results of about half the flushing.

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Old 10-07-2013, 05:51 AM   #14
FredRydr
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Try not to introduce vapor lock that in-tank pumps and filters eliminated.

Fred
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Old 10-07-2013, 08:53 AM   #15
JRWooden
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Quote:
Originally Posted by GoneAgain View Post
no idea... BUT

when mine was playing up, on the computer (at dealer), it was showing around 2 bar when idling ok, and down to .1 bar when she was about to cut out...

2 bar is about 30 PSI... not sure how much hihgher (if any?) she gets under load...

.
Rev 4 of the service manual lists the specs for the pump as:

3.5 bar and 60 liter/hour
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