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Is there any easier way to remove old stuck gaskets ?

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K2-K6:
Ted, you could make a specific metal scraper to help, out of an old wood chisel.

Grind the end completely flat and square with no shape or angles on it, then radius across the blade (as if you've got it flat on the bench and put a tea cup on top to mark the radius.

Now the flat side of the chisel can be put onto the casting face and you push it along to shear off the gasket without the sharp edge digging into the aluminium, if that makes visual sense.  It's how old fashioned engineering scrapers were made to make flat finishes by cutting the metal when the scraper is lifted up slightly to cut the base metal.

Sounds more awkward than reality, should allow you to clean gasket and leave surface alone.

Oddjob:
I have a genuine Snap On gasket scraper and it's flat across the cutting surface, your idea of a curved surface though makes a lot of sense. A lot harder to sharpen though I'd imagine.

Bryanj:
Somewhere i have an air powered snap on gasket scraper, unfortunately no compressor!

Cappodimonte:
I have a compressor but no air powered gasket remover, that said I’d have thought one of those would be too harsh for Aluminium or Mazak  or whatever Honda use. Again I go for gun wash thinners and immerse the cases it will take a bit of time but will lift and weaken the gasket enough to safely remove it without having to use too much elbow grease. If anyone mentions blowtorch be prepared to lose the casing before the gasket is removed. Seen it done by a clever dick who wouldn’t be told then whinged after the fact.

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