More like Sunglasses,it's that obvious. The fact is these type of disasters are far more prevalent with these molded, plastic housings. Not to mention far messier. Not only that, but many are destroyed upon removal, (much like the photo in this thread shows).
It doesn't matter what happens to a steel canister in order to get it off, because it's going in the can regardless. No matter how you look at these things, they're far more problem prone. Especially when you've got some kid doing it for a few bucks above minimum wage, with the mechanical aptitude of a bullfrog.
The “plastic” cap on my wife’s Volvo has lasted 21 years and 296,000 miles - so far. A steel cap would have been a rusty mess by now, given our regular salt water exposure.
Composite doesn’t mean cheap, and it doesn’t mean bad. The F/A-18 center fuselage is made out of composite. Holds up to carrier launches, landings, and high G maneuvering.
This is a problem with kids, as you said, putting things on way too tight. Since my wife’s mechanic (me) knows that they’re doing, the composite works great.
I‘ve had steel oil filters put on way too tight, as well. Kids, not wanting a leak, would go way, way past the 3/4 of a turn after gasket contact. I would have to resort to destruction of the filter to get it off.
The problem is the same - the manifestation with modern design is slightly different.
For
@JeffKeryk - get a new one. You can’t tell if you have damaged composite (this was a problem with the F/A-18, too). The only way to get this off is with a proper tool and more leverage. It’ll come eventually.
No penetrant is going to wick its way up the threads, they’re sealed by an o-ring. Best case, penetrant reduces some of the flange friction, so it’s worth a shot.
I think I used one once just to see, watch and feel.
