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Old 09-14-2010, 02:51 PM
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What to do? Engine block rusting.

Well i got my motor bored, honed, and all the jazz done to it back earlier in the summer.. then put it in the shed. well, the shed leaked on it... pretty bad. ive taken the main caps, and wire-brushed them on the bench grinder style wire-wheel. and also wire brushed the lifter valley, and wiped it down with oil.
What can i do to help get rid of the other rust, and keep it from rusting? im intending on ordering the assembly kit here soon, and get the bottom end done.

-Thanks, -Scott

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Old 09-14-2010, 03:07 PM
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Old 09-14-2010, 03:18 PM
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Natural Light, huh?

I'm thinking any kind of wire brush on any power tool will mess up your machine work. I would use an SOS pad with a little water to get rid of the rust. Before the water dries, hit it with some WD-40 (Water Displacement - 40 ). Really hose it down until all the water runs off. Then place it in a thick plastic bag. Maybe even a heavy duty garage / lawn bag. You may have to have that crank polished, but I'm thinking the rest of it will be okay.
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Old 09-14-2010, 11:14 PM
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id been polishing the crank up by hand, and oiling it, but i slacked off, and it got away from me. Im hoping i can get the motor together soon. After i get the kit ordered, its going on a stand, and in my grandpas shop, where it shoulda been all along.
But, either way, im trying.. Maybe my dad will actually pay for something like he said 9 months ago and can get this finished otherwise, its still up to me to save bits at a time.. like i did for the other 800 ive put into the car..
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Old 09-14-2010, 11:25 PM
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Preventative prep goes along way. My block was stripped down 4 months ago and I knew it wouldn't be used for quite some time so I took a rag and a quart of 10-30 and wiped down the block and bores with it. Not even a hint of rust
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Old 09-15-2010, 12:08 AM
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SOS pad or solvent wetted fine Scotch Brite pad. You can use a wire wheel on a die grinder for noncritical machined or cast surfaces(main bulkheads, gasket surfaces are fine, don't wire wheel bearing bores, thrust surfaces, cylinder bores. head surface). Then oil it and bag it - even in a dry shop - as the daily heating and cooling cycles will make the cold iron condense water from the air and "sweat" anywhere there is more humidity than the desert.
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Old 09-15-2010, 02:03 AM
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i had a similar problem with my 455 block, on my crank i just used like a 1000 grit crocus cloth strip and slowly but surely got the polish back in it. and my block i had some 1000 grit paper to clean the cylinder walls, which re honed perfectly. O and like said before the cast portions you can use some brillow pad. mabye dip it in a little solvent.
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Old 09-15-2010, 11:28 AM
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cool cool, thanks guys!
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Old 09-15-2010, 12:10 PM
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For the light rust I would use some coca cola on a rag and scrub away then wd40 or oil it up and put it in a garbage bag
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Old 09-15-2010, 01:37 PM
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1st off, store it on a thick rubber mat- making sure nothing touches it. Since you already have rust I would just take it to a shop and have the block cleaned- $60 well spent. Then oil it down with Marvel's Mystery Oil bag it, and store it on a rubber mat. I use MMO because it works good at preventing rust AND as a detergent if there is any dirt left over.
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Old 09-15-2010, 02:52 PM
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well were about 80-100 here to get it vatted.. and my dad didnt pay for it on time, and i had to go pick up the slack, and pay for it in the first place, along with the pisons when they got worked on. what a graduation present eh? so the machinist may not be too happy if i go back up there. but we'll see what i can get with some SOS pads and what not.. its mainly the surface area where the main caps bolt down to (unsure of the acutal term.)

but, i'll see what i can do.
Thanks guys.
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Old 09-15-2010, 04:53 PM
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I paint the external portions and then spray the internals down with WD-40. Then cover it with a large heavy duty lawn trash bag. I store and ship blocks this way all the time with no issues of rust.
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Old 09-15-2010, 06:21 PM
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Two or three days in a tub of a mixture of 10 of water to 1 of molasses...

Then haul it out, wash it down and oil it all over.

No more than three days, however.
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Old 09-15-2010, 07:37 PM
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Not to be stuck in the past, but you should always bag or at least cover and engine, block, parts, when you store them. It prevents this kind of thing from happening. Oil and a rag seems to work well on rust though, then hit it with some wd-40 like the other guys said and you should be good to go.
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