Old gas tank for Diesel? galvanized

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cat-black

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Feb 18, 2016
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Location
Ontario, canada
First Name
Wes
Truck Year
1974
Truck Model
C20
Engine Size
cummins 5.9
Hi all,
just dropped my tank to prep for diesel lines and stuff, and read about the older galvanized tanks being no good for diesel. Has anyone retrofitted a different plastic tank in? any direction as to which tanks might work?
I have a fleetside 8 foot box, with tank ahead of the rear axle. 20 gal.
cheers
 

foamypirate

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Location
Central TX
First Name
Jake (Mr. Wilson)
Truck Year
1980
Truck Model
El Camino, baby!
Engine Size
5.3L/4L60E
Hi all,
just dropped my tank to prep for diesel lines and stuff, and read about the older galvanized tanks being no good for diesel. Has anyone retrofitted a different plastic tank in? any direction as to which tanks might work?
I have a fleetside 8 foot box, with tank ahead of the rear axle. 20 gal.
cheers

I'd just order a tank for a 5.7L diesel squarebody. Being it was a diesel, I'd assume it would work just fine. A tank from a 6.2L diesel square may work as well, but I think the filler neck is a different size than the earlier tanks.
 

cat-black

Junior Member
Joined
Feb 18, 2016
Posts
10
Reaction score
0
Location
Ontario, canada
First Name
Wes
Truck Year
1974
Truck Model
C20
Engine Size
cummins 5.9
I talked to a few old gm guys, and they said they have swapped between gas a diesel tanks all the time, no issues. So I went for it.
 

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