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CWPASADENA · 02-18-2020, 10:41 PM

I wash with kerosene and then simple Green and HOT water using a brush to get into all the corners etc.

If the block has rust in the water jackets, I set it up on the bench, block off the water inlet on the side and fill up the water jackets with Rust911. It may take 2-3 applications of Rust911 to get the water jackets clean. I have done several blocks with very good results.

I have taken blocks to my local machine shop and they come back free of grease and oil but most of the rust in the water jackets is still there.

My experience,

Chris W.

02-18-2020, 10:41 PM	#7
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,962	Re: Cleaning a block I wash with kerosene and then simple Green and HOT water using a brush to get into all the corners etc. If the block has rust in the water jackets, I set it up on the bench, block off the water inlet on the side and fill up the water jackets with Rust911. It may take 2-3 applications of Rust911 to get the water jackets clean. I have done several blocks with very good results. I have taken blocks to my local machine shop and they come back free of grease and oil but most of the rust in the water jackets is still there. My experience, Chris W.