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Old 04-24-2008, 02:40 PM
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Unhappy Should I do this????? 1985 300D

hey hows it going, I'm about to replace the little 4'' flexable hose on my fuel return line under the tank, got 1/3 of a tank, just wondering if anyone knows if the return line continues up inside the tank at all or if it dumps the fuel right at the bottom? should i expect a shower of diesel coming out of the tank with a 1/3rd full tank? when i pull off the little flexable section? Thanks!- Robby

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Old 04-24-2008, 03:54 PM
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ya, you will get diesel coming out, so wear some safety glasses and gloves. if you get someone to help you, you can use buckets and have them swap them out while you are below the car holding the fuel line. if you are at 1/3rd then you should be fine with just 2 buckets.
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Old 04-24-2008, 05:57 PM
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Run it until the light comes on. Even after that there will still be a gallon or two that comes out when you pull the lines.
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Old 04-24-2008, 07:13 PM
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Raise the front of the car !!safely!! as much as you can (park on an incline with wheel blocks?) get the fuel to the rear of the tank. Loosen up the ends of your new tubing so they go on nice and quickly.
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Old 04-24-2008, 08:08 PM
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As BGKAST said, run it down to the reserve light.

I had to replace my hoses, but I have a 12 gallon aluminium tank also. not WVO or any of that other stuff, but I hate stopping for fuel when we are on a long trip.

I ran it down to the light, then drove it a little longer. when I drained it I still had 7 gallons. not a big deal to drain it, but less fuel is better.
be sure to clean of the dirt and grim first so you don`t contaminate your fuel if you are going to reuse.

Also good time to check your tank screen as long as you are that far into it.

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Old 04-24-2008, 08:38 PM
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Ya know... I wonder if the old shop Vac trick would work for this. You know the one people use to keep the motor oil in while they undo the drain plug? I never tried it nor ever used it... but one might consider trying it for something like this... as long as he was prepared to deal with it NOT working.

The theory there was to hook a shop Vac up to the fill hole and turn it on. Duct tape, etc. And it shouldn't be something super strong but a cheap small one. And supposedly it would produce enough suction to keep the fuel coming out but yet not suck it up and into the Vac.... and with Diesel there would be smaller risk of explosion or something because of its High Flash point. Similar to Oil really. I wouldn't do it with Gasoline of course, without a sealed Flammable liquids pump. But might be interesting to try it with Diesel... I would do it outside (so as not so cause a spill in the garage, but thats true no matter what method you chose to use) and be prepared for A) it not creating enough suction or B) filling up the shop vac. Might should be a buddy working the Vacuum and standing by.

I'd be interested in how that worked...

I deny all responsibility for the results! Try at your own risk.
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  #7  
Old 04-27-2008, 02:58 PM
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Thanks guys, I gave it a go, it wasn't too bad just a little diesel came out before I could slip the new hose on, thanks for the suggestions! -Robby
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  #8  
Old 04-27-2008, 04:27 PM
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For anyone else considering this task, Kerry has, by far, the best advice:

Go under the hood, disconnect the return line at the cigar hose and run it into a container that will hold all the fuel in the tank.

Start the engine.

Go inside and have a coffee (or a beer).

Come back outside..........you'll find the vehicle stalled..........turn off the key and change the hoses.

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