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MG MGA - mineral build-up in block & head

holy smoke,
It looks like the PO used hard tap water to fill the rad from '55-'76 in my newly purchased '55 TF. I swear, the openings in the head, branch tube, and engine block are half closed-up by rusty stalagmites. Will hot tanking in the machine shop dissolve this stuff, or what? (I'm posting on several pages to get mucho responses.)

thanks,
Tyler
Tyler

Using a standard descaling acid will remove these deposits. Hot tanking will too, but remove all aluminium parts and do them separately yourself
dominic clancy

Tyler, acid is the way to go, but don't use muriatic - it will eat the iron as well. As Dominic says, ready formulated descaler (CLR, etc) These are organic weak acids (citric, oxalic etc.)
Art

Products such as CLR could take weeks to remove any real buildup. Muriatic acid in a mixture of 3 parts hot water will work fine, just don't leave it sit for days. Fill the block and let it sit an hour. Rinse it out and see what you have left. Maybe repeat the process a few times, and scrape around while its soaking. That'll speed the process.
Jeff
Jeff Schlemmer

This thread was discussed between 07/11/2006 and 09/11/2006

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