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#1
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Foaming at the pump.
I bet you thought that I was going to complain about high diesel prices
Even though diesel is $3.35 / gal in Colorado, that not the subject. Whenever I fill up my tank, I seem to get a lot of foaming. This causes the tank to appear full, even though it isn't. A 1/2 day later and I can get several more gallons in. This isn't that big a deal except two things: 1) I can't easily get a full tank, therefor I have to fill up more often. 2) It makes it really hard to determine my fuel economy. Does anyone else have this issue? Just curious.
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1980 300SD W116 - Daily driver. 362,800 miles and counting. (about 100 miles / day) -- on hold, have a ticking vacuum pump. New one on the way. |
#2
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is this on a trucker pump or a car pump?
trucker pumps REALLY pump out fast, causing more foam. try filling at 1/4 squeeze on the nozzel. have fun.
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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! |
#3
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Thanks, I guess I usually do fill up at a farm station. But I have noticed in town as well.
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1980 300SD W116 - Daily driver. 362,800 miles and counting. (about 100 miles / day) -- on hold, have a ticking vacuum pump. New one on the way. |
#4
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Velocity will cause diesel to foam but it should quickly disperse. Oil companies treat diesel fuel with organic additives, such as detergents, cetane improvers, viscosity breakers and occasionally perfumes (collectively referred to as "DAP"). Each oil company has its own preferred DAP which it typically uses only for mixing with its own fuel. All of these organic additives must be compatible with the defoamer.
Diesel fuels delivered to filling stations also may contain some amount of dispersed or dissolved water which can adversely affect the performance characteristics of previously known defoamers. The water causes a decay in defoaming characteristics and in some extreme cases, may cause the defoamer to enhance foaming, rather than suppress it. Such wet defoamers also can result in increased sludge deposition in the fuel tank. Standing foam is an indicator of fuel with a moisture content.
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#5
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I never fill with the nozzle handle beyond the first hold stop (There are usually 3). It takes longer but I don't have to mess with foam.
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#6
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OK, I'm just glad I'm not the only one seeing this.
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1980 300SD W116 - Daily driver. 362,800 miles and counting. (about 100 miles / day) -- on hold, have a ticking vacuum pump. New one on the way. |
#7
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The SDL can take the big hose and fill 20 gal. in a couple minutes. The SD won't gobble (swallow) as fast maybe postion 2 on a good day.
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#8
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hmm, I wonder why the sdl is better with the high flow? they must have changed more than the legroom back there.
My SD handles the high flow fine, but it does have to be burped to top it off.
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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! |
#9
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I also notice winterized Diesel fuel with the additional additives seems to foam more. I usually have to stop filling and burp the tank on the 98 E300 by putting a little of my body weight into the side of the car and give the vehicle a jiggle.....then I can top off the tank. On my old K-1500 Diesel Blazer I use to jump on the rear bumper to dislodge the trapped air from the foam in the tank to help filling.
Cheers!
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FRED Daily Driver: 98 E300TD 199K Hobby Car: 69 Austin Mini Past Diesels: 84 300SD, 312K 87 300SDL, 251K 94 Chev. K-1500 6.5Ltr.TD, 373K |
#10
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yea its annoying. I went to autozone and asked them if they have an antifoaming agent, they asked me "what are you talking about, foam"??
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1981 300SD 512k OM603 |
#11
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Sounds like Rabies it needs its shots.
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1981 -300D w123 - Daily driver "Even a clock that does not work is right twice a day"Polish proverb. |
#12
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The neck sizes are different. The SDL can take the big hose all the way in The SD can only swallow a couple inches.
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#13
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This is what I do for the 300SD...
I pour 3 or 4 ounces of Disel Kleen and 2 ounces of Lucas Fuel treatment into the tank. Than I fill it until the pump shuts off automatically. It doesn't matter which 'stop' I use on the nozzle, in fact in NY and Pa they remove the auto hold feature on self service pumps. (guess they want us morons to hold the darn thing the whole time) Once the pump shuts off, I bounce the car and get it rocking. This gets the air out as I slowly fill it. I canusually get three or four burps out of it before fuel not foam comes all the way to the top of the filler pipe. Once I think I am really full, I bounce her again and maybe get one more burp. then I fill it again. I get it filled all the way that way...
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"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy" Current Monika '74 450 SL BrownHilda '79 280SL FoxyCleopatra '99 Chevy Suburban Scarlett 2014 Jeep Cherokee Krystal 2004 Volvo S60 Gone '74 Jeep CJ5 '97 Jeep ZJ Laredo Rudolf ‘86 300SDL Bruno '81 300SD Fritzi '84 BMW '92 Subaru '96 Impala SS '71 Buick GS conv '67 GTO conv '63 Corvair conv '57 Nomad |
#14
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I do that too, but not at the pumps
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#15
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Yes, I get that sometimes, it won't even trickle in, I fill up across the street. This happens at the same pump I've been using for a year or more. The last two times it happened I spoke with the person inside, and told 'em I'm taking my business elsewhere. Seems the fuel velocity can be adjusted in the pump somewhere. Better now.
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83 SD 84 CD |
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