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I just put one litre of evaporust in as its expensive.i just swilled it around and was very happy with the results
Gas tank rust removal
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The best way I've seen over the years to purge any residual fumes from a gas tank is to put a hose from a running engine (car exhaust is what we used) into the tank for at least an hour. The warm exhaust evaporated any remaining fuel residue and fumes
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Cool. I've heard that before but never with the steam cleaning aspect you describe added. I always assumed they were just purging the tank of oxygen with the CO2. Thanks for the reply. I'll give it a whirl! If I don't report back that means it didn't work...
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To be completely clear, this was after a significant water flush as well. You might Google search it to see if any better ideas come up
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Yes I've searched until my little fingers were numb. As with anything on the webernets, lots of opinions, techniques, and bickering out there, ha!
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I finally gave the white vinegar method a go and was pretty pleased with the results.
Before:
![307440]()
After:
![307441]()
Before:
After:
When I got my bike it had sat for 20 years with half a tank of gas. It was pretty bad inside. I used apple cider vinegar cause it was cheap and environmentally safe. Rinsed with baking soda and distilled water. Cost me about $12 total. Took 10 days. I did add nuts/bolts etc to break off the 1/4 layer of rust/silt from side of tank. One thing nobody has mentioned is you will need to run an in-line filter. There’s always tiny participles immediately following cleaning. This is what worked for me and loved the price!
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(I know this is a thread about "Gas tank rust removal" but could this help prevent it?)
Is it just me or has anyone else noticed that two-stroke bikes don't seem to have as many problems with rusted gas tanks and exhaust systems as four-strokes?!!
Could adding an ounce or two of two-stroke oil to a tank of gas on our four-stroke machines help prevent future rusting of the inside of the fuel tank and muffler(s) by leaving that oily residue that coats the inside of these parts on two-strokes bikes and thus preventing those parts from rusting. (Since its designed to burn completely in a two-stroke, it should not cause any combustion problems or smoking.)
Could this be a preventative maintenance routine to help preserve our restoration work?
Mark
Is it just me or has anyone else noticed that two-stroke bikes don't seem to have as many problems with rusted gas tanks and exhaust systems as four-strokes?!!
Could adding an ounce or two of two-stroke oil to a tank of gas on our four-stroke machines help prevent future rusting of the inside of the fuel tank and muffler(s) by leaving that oily residue that coats the inside of these parts on two-strokes bikes and thus preventing those parts from rusting. (Since its designed to burn completely in a two-stroke, it should not cause any combustion problems or smoking.)
Could this be a preventative maintenance routine to help preserve our restoration work?
Mark
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Two cycle oil is also a pretty good gas stabilizer too.
we just used apple cider vinegar on a pretty rusty CB 175 tank. Worked great. We also used distilled water and banking soda to neutralize. The first time we didn’t do it fast enough and got some flash rust so had to repeat all.
Once neutralized and dried can the tank sit empty or must it be filled with gas? We have more work to do and not really ready for gas.
Once neutralized and dried can the tank sit empty or must it be filled with gas? We have more work to do and not really ready for gas.
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81 Posts
Just thought I’d share my experience with you guys.
+1 on the vinegar method. Have a CB175k5 tank on a CL175 with what looked like only surface rust. I soaked it in white vinegar for 48 hours, rinsed the vinegar through a filter for particulate (there was a lot). I soaked it for another 48 hours and followed up with water/baking soda and then a bottle of “Heet.”
After the Heet I filled it immediately with fresh gas and didn’t notice that there was the smallest pinhole, large enough to make the garage stink of gas when coming back a day later. I’m guessing there was a lot more rust in my tank than I thought and with the vinegar soaking there was just not enough steel left in the tank. I mistakenly tried to use JB Weld on the seam to plug the pinhole but of course that didn’t work.
When it was all said and done I ended up sealing it with Caswell sealer, looks cool IMO. If anyone’s wondering I emailed Caswell and they said those little bubbles were normal? I prepped the tank thoroughly so I’m hoping it holds up over time. Now onto the exterior of the tank, looks like hell but I’m dreading attempting to repaint.
+1 on the vinegar method. Have a CB175k5 tank on a CL175 with what looked like only surface rust. I soaked it in white vinegar for 48 hours, rinsed the vinegar through a filter for particulate (there was a lot). I soaked it for another 48 hours and followed up with water/baking soda and then a bottle of “Heet.”
After the Heet I filled it immediately with fresh gas and didn’t notice that there was the smallest pinhole, large enough to make the garage stink of gas when coming back a day later. I’m guessing there was a lot more rust in my tank than I thought and with the vinegar soaking there was just not enough steel left in the tank. I mistakenly tried to use JB Weld on the seam to plug the pinhole but of course that didn’t work.
When it was all said and done I ended up sealing it with Caswell sealer, looks cool IMO. If anyone’s wondering I emailed Caswell and they said those little bubbles were normal? I prepped the tank thoroughly so I’m hoping it holds up over time. Now onto the exterior of the tank, looks like hell but I’m dreading attempting to repaint.
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Has to be filled or coated with something like fogger spray or Marvels mystery oil (some don’t recommend MM) or 2 stroke oil.
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Update: After one day of gasoline in the tank the liner has failed. If I had to take a guess is I could have dried the tank better. I used lacquer thinner and air gun but only let dry for 8 hours after air gun and sitting outside in the Texas heat. I could have done the oven or clothes dryer method to ensure it was dry but was eager to seal it and I thought I had dried it well enough but indeed I did something wrong. Will not attempt again will use GTL tank lining services after I have saved the amount of money needed. Sad day indeed.
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