Later this summer I plan on replacing front and rear tanks in my 1994 F-350 as mine are steel showing rust and want to do plastic replacement.Anybody have any recommendation on where to get tanks that fit and you don't have to modify anything?
Check where the straps go. If it's pitted I'd chuck it, new tanks aren't terribly expensive. If not, sandblast or wire wheel and paint. I'd use a rust converting primer first though. This would be a good time to do the external vent mod. 5/8" hose from the tiny vent on top of tank to the top of the filler, eliminates most filling trouble. Also a 38 gal rear is more or less a bolt in replacement, may as well go that route if you need to replace the rear and it'll be bradn new no rust so you cna paint and/or undercoat to preserve it.
Personally if in doubt at all just replace them. Replacement are available for cheap and I've dealt with enough leaky pinholed tanks to not want to mess with it.
What I know about plastic tanks is really just hearsay so take it with a grain of salt. I have heard that they had problems with condensation. I have no idea how it works, maybe google it to see if it's a real concern or not. I think it had to do with thermal expansion.
I cleaned my front tank because of rust and it was really just a waste of time and money. I ended up just replacing it later on with one from performance radiator. They had the best deal I could find in my area. It was galvanized metal and before I put it in I sprayed it with undercoating all the way around.
79jasper;840851J said:ust imo, but far as tanks go, plastic is actually stronger. Say something flies up and hits it, the plastic tank will give and take the hit easily. With the metal it's gonna bend or puncture.
Another option instead of a sand blaster would be some chain. Throw it in the tank and shake it around.
Can't remember the exact details on what chemicals to use.
If you're interested, now would be the time to upgrade to larger tanks. Or even a large single.
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For the cost of the sand blaster and sand you can pic up replacements with new straps. I think I have about $140 in my tanks and straps.
You're lucky I'm not a moderator here. You would've been gone long ago.
You take every little thing anyone says and argue it.
The "extreme conditions" of metal stretching will NEVER happen with a fuel tank.
Explain how I can kick a metal car door and it dents, when a plastic one pops back out with no sign of damage.
Tanks can/will/DO rust on the inside also, just not as much.
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You're lucky I'm not a moderator here. You would've been gone long ago.