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Project CB350F

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McCabe-Thiele (Ted):
Those cylinder base gaskets really do stick hard as both sides of the gasket are baked hard - I continually brushed thinners on mine  to try to make it soak in. I used a hard plastic scraper to lift an edge peice then soaked the new edge in thinners to eventually get small sections to lift. Sometimes an inch or more would come off, then only small sections. If you can rough up the gasket surface that seems to help the thinners soak in.

I did buy some gasket remover off e-bay but it was no better at removing gaskets despite what it said on the tin. I did mine over a period of time as it's boring work eventually reverting to using a loose Stanley knife blade held almost horizontal to the alloy surface to avoid it digging in. With a hand held blade it's easier not to press too hard as the dull end digs into your thumb.

K2-K6:
If you get something like an old woodworking chisel, then grind the end completely flat-square- 90 degrees to give a no blade end. Then gently grind across the end (from one side to the other)  in very broad radius (something like dinner plate edge in size) then make sure you've no burr on the edges to ensure no snagging, you've now got a metal scraper that you can lay flat on the gasket surface so that it doesn't cut the surface, but will easily remove the gasket material as you push it.

If the description is too long winded, it should finish by looking like perhaps a two pence piece layed flat on a surface to give you orientation. 

Its not an unusual thing to make, but quite ordinary as a metal scraper than would be used in a toolroom for making things like surface plates by hand scraping. If you tip it up to any degree it'll cut the metal surface, but run it flat to gasket face and it'll take nothing off, just the gasket. 

Sounds cumbersome, but very effective in use.

magpie114:
I'll try some gasket remover - either Hermatite or Loctite, whichever I can get first. I've been working on it much like Ted recommends, slowly and a small area at a time with a Stanley blade and yes I've got a very sore thumb!

The scraper sounds logical, I've got an old woodchisel I can sacrifice. I'll try that in combination with the remover.

McCabe-Thiele (Ted):
The aerosol gasket remover I used was called BONDLOC  "formulas that work" it spouts on the tin  -  trouble is it's Non-Chlorinated & Dichloromethan free - means useless.
It does stick to vertical surfaces though.

K2-K6:

--- Quote from: McCabe-Thiele (Ted) on October 30, 2023, 04:22:31 PM ---The aerosol gasket remover I used was called BONDLOC  "formulas that work" it spouts on the tin  -  trouble is it's Non-Chlorinated & Dichloromethan free - means useless.
It does stick to vertical surfaces though.

--- End quote ---

M E K pvc solvent, a useful and more potent cleaning agent is worthwhile trying  ;)

Handy to keep some around for variety of task. Check first on plastics though as it'll dissolve some.

Also useful for cleaning gasket contact surfaces of castings etc prior to assembly as its a good degreasent.

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