Hi Dustin,
Too early to give you a definitive "good" or "bad" as far as my tank's
health is concerned. You'll be happy to know that you are entitled to my
opinion though! :-)
I think the main reason for heat is to loosen some of the petroleum-based
residue from the bottom of the tank. I just added the vinegar hoping it
would help loosen any flaky rust. What poured out after about 4 hours
looked just like sewage. This was a tank that had been on the car for 18
years then in my garage for 10 years.
I didn't use Muratic acid because of the brittleness concern. I'm too
clueless to know what "not too long" is.
After it dried, I shop-vac'd it out (no vapors left after boiling!) I took
a piece of chain and dropped it in and shook it around for 15 minutes to
try and break loose any remnants. I couldn't detect any.
Just a word of caution though: The siphon that sucks gas from the bottom
of the tank appeaars to have a plastic component (at least mine does) so
don't let the tank boil dry!
Just to be cautious, I double filtered the lines. One at the tank and
one before the carbs. If I still have trouble with the tank I'll probably
buy new (~$100) because I got mixed reviews when I asked about sloshing
compounds.
Jim Henderson
'69 Sprite MKIV HAN9U78817G
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