Re: Best way to clean a block ??
[Re: Stanton]
#2584697
11/29/18 03:04 PM
11/29/18 03:04 PM
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Joined: Jan 2003
Posts: 4,332 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,332
Morrow, OH
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I really like the ultrasonic method for a final clean. In my opinion there is no better way for a final clean.
I considered getting a cleaner big enough for a block but it just wasn't practical for me - size wise, financially and even the power to heat the water. I ended up with one big enough to do heads and cranks. Plus I might clean only a few blocks again in my lifetime.
But the ultrasonic cleaner will not address heavy grease or rust/scale so off to the machine shop it goes to anyway.
BES (Tony Bischoff) did my last motor and he has the same cleaner that I have and also the larger one that does the blocks.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Best way to clean a block ??
[Re: Stanton]
#2584807
11/29/18 06:57 PM
11/29/18 06:57 PM
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Joined: Jan 2003
Posts: 13,496 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,496
Marion, South Carolina [><]
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For what you're wanting to do, the bake and blast method is best as long as you're going to be boring it and all afterwards. As long as it is baked properly, there should be no shot left caked up in grease anywhere in the block. The idea is to cook the block until all oil and grease is dried up and crusty so it blasts off clean and dry. You never blast a block that hasn't been baked and obviously it has to be stripped of everything before it goes in...cam bearings, freeze plugs, oil galley plugs, etc. I used to use the AMPRO bake/blast setup at the shop I ran. Worked great.
After machining was complete it went trough the jet washer. 180° water through high pressure spray nozzles w/ ZEP cleaning solution mixed in. Great for removing grease and oil, but won't touch rust or paint.
As a general rule, if the block/head/whatever wasn't rusty or EXTREMELY greasy (like went years w/o an oil change and sludged up) then it just got run through the jet washer.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Best way to clean a block ??
[Re: Stanton]
#2585239
11/30/18 04:15 PM
11/30/18 04:15 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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We used to use dry ice to blast semiconductor parts. Still had to clean them afterwards, but this was a class 1 clean room so it's real particular about particulates, lol.
Never had anything rusty/greasy or oily run thru the blaster. That would have contaminated everything.
No need for O2 or ventilating the building, though the blast cabinet did have a real good ventilation system and you had to ground things or you would get zapped by static electricity, still got zapped anyway.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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