Rusty Engine Block........ - Team Camaro Tech
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post #1 of 6 (permalink) Old Oct 1st, 03, 04:32 AM Thread Starter
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I have a very well-seasoned stock bore bare block. Been outside for a few/several years. How/what does one do to clean the rust from inside the block, i.e., oil galleys, water jacket, etc.?

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post #2 of 6 (permalink) Old Oct 1st, 03, 05:32 AM
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Machine shop glass beaded my rusty block then honed all the lifter holes. A bit pricey, but it's running well.

Kevin

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post #3 of 6 (permalink) Old Oct 1st, 03, 05:39 PM
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Everett,
See if there is a shop near you that uses an oven and shot blaster to clean thier parts. It will make the block look like new, but be forwarned...if it has had a lot of water sitting in it, it may be pitted up beyond repair. The shop should be able to tell you before they waste any time on it.
Hope this helps,

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post #4 of 6 (permalink) Old Oct 1st, 03, 06:35 PM
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Head to your local home improvement store and pick up a good spray bottle and a gallon of Hydrochloric or Muriatic acid (same thing). Put the block on an engine stand and in an area that is well ventilated and it doesn't matter if it drips. It helps to let the block set in the sun and get heated up. Don't do it on a day with any wind or you may end up getting the mist on you or breathing it - not a pleasant experience, I can tell you for sure. Spray it with the acid and let it set awhile. You can respray as needed in the toughest spots. Rinse thoroughly with water and spray down with WD-40. This tends to give a block a greenish tinge due to the traces of different metals in the cast alloy. The other option is to get a large plastic drum and cut the top out, fill about 1/2 way with water and add 2 - 3 gallons of acid and lower the block into it, then fill until it just covers the top of the block. This gets inside and outside, but the drawback is you can't rinse inside all of the passages with just a hose - it needs to be dipped a couple of times in clean water to neutralize the acid completely. Unless you leave the acid on the block for an extended period of time, it won't hurt the metal and it will look like brand new when you're finished. HTH

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post #5 of 6 (permalink) Old Oct 2nd, 03, 02:28 AM Thread Starter
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Thanks for the suggestions. And here I thought of using a Popsicle stick and a jar of Naval Jelly.......LOL

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post #6 of 6 (permalink) Old Oct 2nd, 03, 04:05 AM
 
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You can neutralize the stuff by dipping it in Baking Soda and water just like the acid and water...

Then hose h-ll outta her for good measure!!

And a bucket of hot water and dish washing liquid and a big sponge or lint-free shop rag will help clean her the last time too, followed by a long water hose spray down.

Just be sure to have some WD-40 or ATF handy when you dry your cylinders b/c they will re-rust right before your eyes!!

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