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Gas tank — Gas to Diesel

Started by Delibes, 20 August 2014, 03:45 AM

Delibes

Anyone have experience swapping a (larger) gasoline fuel tank (450SEL, 350SEL, 280SE) to a diesel 300SD W116? Are any modifications needed, or is it bolt on? Anything to do to the fuel lines? How about tank filter location, mesh and size?

Cheers and thank you in advance!
1977 W116 450SEL (033), 040 Black, Daily Driver, French lamps, curtains. #74845

buki5

Resurrecting an old question.  Anyone have experience?
1980 300SD turned over 84K 10-20-2021
Silver w/ Blk MB Tex

orientrot

I'm swapping mine. I'm fairly certain it's just bolt in but I will have a look at my tanks and update.
75 450SEL
80 300SD- cancelled project
83 300D- 5-speed OM617
84 300D- AMG 5.4L N/A M113 6 speed
92 300D- 722.6 OM603 3.5
93 190E 2.6 Sportline LE x2- 6-speed M111 turbo, 3.0 M103
02 C320 Wagon
03 Sprinter 2500
06 E500 4Matic Wagon- AMG 5.4L NA M113

UTn_boy

The two tanks are a direct bolt in.  However, there are three things that have to be changed.

1) Fuel gauge sending unit.  They are not the same between the large and small tank.  The fuel gauge will never read accurately. 

2) Fuel gauge in instrument cluster.  The gauges are calibrated to match the sending unit. 

3) Tank screen.  The diesel and gas tank screens are different.  The gas version has a finer mesh screen than the diesel does. 
1966 250se coupe`,black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3,papyrus white/dark red leather
1975 450se, pine green metallic/green leather
1973 300sel 4.5,silver blue metallic/blue leather
1979 450sel 516 red/bamboo