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Sporti : Remove Paint from Engine Block

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Guztave View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guztave Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2019 at 08:43
Hi Ian,

No problem, I am going to be working through various processes on low visibility areas of the engine block before I have found the best solution and take the main block. Will take notes and publish my findings with photos every now and then on this forum - collaboration, it the way to go.

Cheers
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Ian T View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian T Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2019 at 08:52
Wonderful

Looking forward to it and totally agree

Cheers

Ian
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Glawster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Glawster Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2019 at 09:54

[/QUOTE]

Fascinating stuff, sorry about the picture repeat, but my computer skills are becoming legendary. 

I have googled away on this phosphoric acid stuff and it looks good, also found the 85% you recommend. Looks a bit lethal if not done right on the aluminium. Trouble with MrGoogle is you get so many different recommend processes. 

Could I ask please if you would be kind enough to just lay out yours, I.e. How applied, how long, how cleaned off and what you did post application to finish off. I have an old block and would like to try it out. 

Great stuff

Cheers

Ian
[/QUOTE]

Ian,
First degrease it.  I find the Meguiars Super Degreaser to be the best I've used.
Then apply the 85% Phosphoric acid without diluting with a paint brush.  After half an hour scrub it with a scouring pad or Brillo pad.  Then clean it off with Flash in hot water.  And repeat.  And repeat..
OK, you can't achieve anything like the finish you get from vapour blasting, but at least it's an improvement.  On the T3 engine below the cylinders / heads / rocker covers and timing cover were all vapour blasted.  Crankcase was just cleaned.

DSC_2178 by Derek Wardell, on Flickr


DSC_2255 by Derek Wardell, on Flickr


Edited by Glawster - 13 Nov 2019 at 09:57
1973 Guzzi V7 Sport
1955 Guzzi Falcone Sport
2019 V85TT

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Guztave View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guztave Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2019 at 10:00
Thanks Ian,

Will buy the chemicals you recommend and try them.  That engine does look good. 

In a year or two, my plan is to have a Ghezzi Brian tuning kit installed which will require the engine being fully stripped - will get it all vapour blasted then, but for now any improvement to the 5hitty paint job a previous owner did will be good.


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