terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Feb 9, 2019 20:19:12 GMT
Pistons dont look to bad, anyone know an easy way to remove the old gasket from the bottom of the casing. It doesnt look to bad on this image showing the bottom of the engine but not easy to clean off on the other section of engine piston casing. I dont want to damage the aluminium surface with a metal razor blade. Anyideas?  |
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Post by buster on Feb 10, 2019 9:19:57 GMT
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Feb 10, 2019 10:46:14 GMT
Thanks for that, I have ordered some.
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Post by BritPete on Feb 10, 2019 16:08:09 GMT
Thanks for that, I have ordered some. Let us know how effective they are |
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Post by grahamb on Feb 10, 2019 18:39:57 GMT
some on the interweb say ,use some brake cleaner to soften the gasket.
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Feb 18, 2019 20:37:07 GMT
Thank you for the suggestions, I will takes some images of the tools that I have bought and will let you know what works best.
Might be a couple of weeks as weekends taken up just lately.
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Mar 2, 2019 16:40:09 GMT
This is what the gasket looked like before I started to try and remove it.  |
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Mar 2, 2019 16:43:57 GMT
Another picture of the gasket and two different types of plastic scrapers. Tried both but all they would do is remove the loose sections. As soon as it got to the stuck on parts it would not remove it even with a hammer. They dont scratch the aluminium which is good but couldnt do the job I needed. Also tried it with brake and carb cleaner.    |
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Post by bojer on Mar 2, 2019 16:46:13 GMT
FWIW , having tried most of the "easy" solutions I end up using one of those paint scrapers that hold a craft knife blade .........carefully !
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Mar 2, 2019 16:50:04 GMT
Also purchased a bag of 50 plastic razor blades, again would not touch the stuck fast gasket sections. I found the brake and carb cleaner kind of helped but not that well as it evaporates to quickly.  Also tried this painters tool for removing glue from painted bodywork. Also failed dismally. If anyone wants to know these can be called Caramel Wheels and do work really well for removing double sided tape sponge without damaging the paintwork. No good for very old gasket though.  |
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Mar 2, 2019 16:57:25 GMT
The only way I could get the gasket off the barrel was with a metal razor blade. I know that its risky but placing it almost horizontal with the surface minimised damage to the aluminium.  Duck oil worked best for me to soften the gasket material, I would say WD40 would also work. This wets the gasket material and helps to dissolve it as well plus it lubricates the two metal surfaces to also help reduce scratching.  I then used a fine scotch pad to remove the finer traces of gasket and some surface corrosion.  Finished result after an hours work, now ready to go off to the Vapour blaster.  |
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terryb
Full Member
Rebuilding my CB450DX
Posts: 73
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Post by terryb on Mar 2, 2019 17:08:40 GMT
I have to now remove the gasket remains off the top of the engine casing which could prove to be even more difficult as I will need to stop the debris from going inside the engine. I have blocked all the gaps with clean rage and socked the gasket with Duck Oil. I will give it a go in the morning.  Hopefully I havent damaged the surface, I dont think so. You definitely have to be careful with the metal blade, I used it without a holder so that I had more control and feel. I would also say dont go in at a steep angle, try to keep it very flat with the surface, also use a new blade as old ones can have nicks in them which may gouge deep into the aluminium surface. If anyone has some suggestions or pointers please let me know or would like to point out issues that I may have caused as I am not trained in this field of work. Fingers crossed Ive done ok. |
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