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  #1  
Old 11-02-2006, 10:18 PM
85 DSEL's Avatar
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Change of prefilter method?

Haven't changed mine yet but need to soon as I'm seeing crud build up in the prefilter. When I remove the filter from the fuel line I'm thinking it's going to be a tad messy? A pan under it should do the trick of catching any fuel spills? Also, when the new one is installed, how do I go about priming it? I've read about a hand pump - where is this located and will I need to use it? Thanks for your help...
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  #2  
Old 11-02-2006, 10:25 PM
Tabor
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I have two needle hose vice grips - they come in handy all of the time. Use them to clamp off the fuel lines.

The hand pump is on the injector pump, right next to the prefilter.
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  #3  
Old 11-02-2006, 10:35 PM
henrydupont
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unscrew the hoseclamp at the L shaped side of the filter and take it out of the hose going to the primerpump, holding it upward so the fuel goes back a bit. then unscrew the side going to the main line that goes to the tank and put the new filter on. then with a swift motion put the crooked end back into the line going to the primerpump! any spill can be sprayed off with brake cleaner. I sometimes clean my prefilter with brakecleaner and put it back, if I can get all the crud out by shaking it some and then blowing it out.
crud may come from algea in your fuel tank or maybe someone drove it with unfiltered vegetable oil.
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  #4  
Old 11-02-2006, 10:46 PM
t walgamuth's Avatar
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and if you put a baggy on your hand you can hold a finger over the line while jockying the new filter into position.

it really isnt bad.

tom w
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  #5  
Old 11-02-2006, 11:18 PM
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I disagree.

I have changed the filter in my TD now three times in as many weeks, and I think the best way to pull a cruddy filter is to loosen the clamp from the rubber line that connects to the steel fuel line going to the tank, then pop it loose and plug it off with finger, then pull the other end of the filter from the little hose on the purge pump. lift and remove. no spill at all, and most importantly, no gunk goes back into the fuel line toward the tank to just plug up the filter again...
John
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  #6  
Old 11-02-2006, 11:27 PM
Slow Attack Submarines
 
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you can plug the line with a bolt
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  #7  
Old 11-02-2006, 11:30 PM
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Stick the old filter in as you pull the old one out, if your good you only spill a couple of drops.

FYI crack the fuel cap first to get rid of any pressure build up.
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  #8  
Old 11-02-2006, 11:33 PM
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Quote:
Originally Posted by vstech View Post
I have changed the filter in my TD now three times in as many weeks, and I think the best way to pull a cruddy filter is to loosen the clamp from the rubber line that connects to the steel fuel line going to the tank, then pop it loose and plug it off with finger, then pull the other end of the filter from the little hose on the purge pump. lift and remove. no spill at all, and most importantly, no gunk goes back into the fuel line toward the tank to just plug up the filter again...
John
thats the same method that i use.......
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  #9  
Old 11-03-2006, 04:08 AM
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Wait until you have less than half a tank and park facing up hill. No fuss, no muss
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  #10  
Old 11-03-2006, 05:14 AM
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Engineering at it's finest......

Quote:
Originally Posted by bgkast View Post
Wait until you have less than half a tank and park facing up hill. No fuss, no muss
That is the method that I use as well.......dosen't work well in Louisiana and Florida tho.......

SB
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  #11  
Old 11-03-2006, 07:20 AM
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WOW! What a pleasant surprise ! I posted this just before going to bed last night and YOU GUYS COME THROUGH AGAIN !

A lot of useful info for what I had assumed was a simple procedure but I was interested in knowing how you guys handle this little job. Now I know! Thanks mucho!
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1995 W124 Wagon

Dale

1995 E320 Wagon 173K
1988 260e Sedan 120K
2006 BMW 330Ci 110K
-----------------------------
[LEFT]2007 F-150 XLT 175K
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  #12  
Old 11-03-2006, 08:25 AM
vstech's Avatar
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less filling...tastes great...

parking up hill sounds good to keep spills to a min, but it sucks stuff backwards out of the prefilter back into the fuel line into your tank, just to get caught back in the prefilter again... counter productive. if you remove the line from the tank side of the filter, and plug it off, NOTHING goes back into the tank, and Nothing spills! then just dump the dirty fuel into the appropriate container and put the new one back on. prime and go...
John
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #13  
Old 11-03-2006, 05:49 PM
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Or, you could do as I do on a lot of things that drip when changing. I take some bare copper wire(2 pieces) about a foot long and stick them through a 1 gal ziplock baga on each side right at the zipper and pull it around whatever you are working on and then bend the copper wire around something to hold the bag in place and the bag is big enough for your meathooks to reach in and take clamps, etc. off and put back on and no spilling if a mistake is made. Then zip it up and into the dumpster or woodstove.
Bud
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  #14  
Old 11-04-2006, 09:16 PM
henrydupont
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or just spill it. it's not that much and diesel smells so good!
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  #15  
Old 11-04-2006, 09:24 PM
ForcedInduction
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Real stuff!

Quote:
Originally Posted by henrydupont View Post
or just spill it. it's not that much and diesel smells so good!


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