Author Topic: Gas tank — Gas to Diesel  (Read 658 times)

Delibes

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Gas tank — Gas to Diesel
« on: 20 August 2014, 01:45 AM »
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

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Re: Gas tank — Gas to Diesel
« Reply #1 on: 05 October 2021, 07:09 AM »
Resurrecting an old question.  Anyone have experience?

orientrot

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Re: Gas tank — Gas to Diesel
« Reply #2 on: 05 October 2021, 08:46 AM »
I'm swapping mine. I'm fairly certain it's just bolt in but I will have a look at my tanks and update.
'80 Orient Red 300SD- 185,XXX OM606 turbo project
'81 Orient Red 240D- 250,XXX 4-speed
'83 300D- 100,XXX- 5-speed OM617.950
93' 190E 2.6 Sportline Limited Edition- 89,000- 5-speed, megasquirt project
'03 Sprinter 2500- 240,XXX

UTn_boy

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Re: Gas tank — Gas to Diesel
« Reply #3 on: 05 October 2021, 12:30 PM »
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
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex