Pretty much anything not covered by the topics above. Short lived production bikes or vehicles, Electrical, Tires, Paint, Brakes, etc. Use this for tech questions, and "Shoot the Bull" for general conversation, no tech.
Por15 is the way to go, IMO.......
Water can separate from gasoline, and sit at the bottom to do damage if left un-attended for extended periods.
Tops of tanks don't rust through, the bottoms do.
Machines in service are shook up and purged often enough to prevent the problem.
It's garage queens that are at risk.
Since USA fuels no longer have a decent 'shelf-life', topping them off for storage might not be such a great idea any more. (Not to mention the fire hazard....)
I drain and swab them out dry.
Swab them with mineral oil if you are really worried.
(My flexible non-sparking swab is a length of soft copper water tubing flattened at one end. I split an eye in the end with a chisel, and loop a rag through it: http://virtualindian.org/6techtoolspic3.htm)
Agreed, the water (being heavier than P4Gas) does sit on the bottom..There-in lies that problem..
However, sealers have improved, ie: Por15
HD (modern) moco has been coating tanks (different coating) for about 2 decades that I know of..
Even in the Service Manuals it states if tank is dirty, wash it out with warm soapy water & let dry...No rust or worries..
Now that works for me..
My experience with sealers is that they were better in the past.
My wife's rat has had Kreem in it since the mid 80's, stained but otherwise in perfect condition to this day in P4gas. Modern Kreem doesn't seem to have a good reputation, however!
POR-15 lasted 15 minutes for me before it softened, then expanded and wrinkled into shreds in summer-blend Shell Premium.Cost me $$$$$$!
Caswell's epoxy lasted a few months.
I have witnessed a red rubbery coating suddenly melt out after many years of good service.
(Thin red varnish-like sealers from radiator shops may deteriorate over many years, but at least they don't glob up things!)
It would be nice to know what the Factory uses, but it still may only be a matter of time before digestive additives, or illegal dumping, take their toll.
It is a gamble to depend upon any sealer to stay put; Rust is the lesser risk!
or should I just get rid of it all? Kurt said to try paint stripper, anyone ever tried this? Got a paticular brand name?
All input appreciated....Rod
From what I've recently learned, HD may now agree with you..
As I understand it, starting for the 2006 & newer fangled harleys, the gas tanks are NO longer coated...
says even their oem coatings can possibly slowly dissolve away.. (or the bean-counters are doing away with the cost) ??
I don't know ? my daily rider is 15 yr old FL & still has the oem coatings & looks coated well in my tanks.....
After nearly a month of acetone soak, many days of of it tumbling with aquarium gravel and acetone, I find that although the sealer softened, it still adheres and does not dissolve.
Attached is a photo of some of the material after it is scraped loose.
(As always, external photohosting sucks; clicking on the thumbnail will enlarge it, but take you to imageshack)
Before the acetone soak, it resembled the adhesive used to secure the felts in Panhead valve covers. Anyone know what the felt adhesive compound might have been?
As to your treasure you found...looks like some gizzard guts from a post-mortem operation..
How bout putting it on ebay ?? gotta use the magic words "Old School" & of course obsolete...And any additional vernacular you deem fitting...
I still have a vivid mental image of you holding the 'pink goo' outta the last tank you posted the pic to...(yuk!)
Upon drying, it shrinks to become the tough rubbery material shown.
Although temperatures are low in my shop, it is still ironic that a piece of it bottled in summer blend Shell Premium doesn't appear affected at all.
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