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Checking for cracks in an aluminum block at home - possible?

HallenTi

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Joined
Nov 21, 2002
Messages
150
Location
Auburn, WA
Corvette
2006 Victory Red coupe
When getting a used, bare aluminum engine for possible rebuild/build-up, is there a reliable way to check the block for cracks at home? I know that a seemingly good looking block doesn't mean it has no unseen cracks. I know there is Magniflux, but wasn't sure that worked with aluminum blocks. Can if be sprayed with a product to reveal cracks after a thorough cleaning? Thanks!
 

bossvette

Gone but not forgotten
Joined
May 19, 2003
Messages
3,233
Location
West Unity Ohio
Corvette
1968 1997
where I work they check the forks on the towmotors with a Zep product that first a cleaner/primer is sprayed on then the product is sprayed on to reveal the cracks, I'll try to find out the name of it.
 

HallenTi

Well-known member
Joined
Nov 21, 2002
Messages
150
Location
Auburn, WA
Corvette
2006 Victory Red coupe
Bossvette,

I'd appreciate the name when you get the chance. Sounds like something that would do the trick!

Tim
 

Ezmunie

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Joined
Feb 10, 2006
Messages
233
Location
Sherman,Texas
Corvette
1986 Black Convertible
Magnuflux, Met-L-Chek, and other manufacturers make a visible dye penetrant to check for defects in castings. I am in charge of non-destructive testing (i.e. x-ray, liquid penetrant inspection, ultra-sonic inspection) at an aluminum casting foundryand we use a flourescent penetrant system that involves a black light to detect the defects (cracks, etc.). The key to detecting discontinuities is proper cleaning of the specimen, then proper application of the penetrant. There are visible dye penetrant kits available with directions that are fairly reliable for crack detection if correct processing parameters are followed. See here:http://www.ndtsupply.com/shop/products.asp?rad_id=PT-MCKT-1001&keyword=Penetrant&str=s&id1=11&id2=100&id3=164
 

HallenTi

Well-known member
Joined
Nov 21, 2002
Messages
150
Location
Auburn, WA
Corvette
2006 Victory Red coupe
David,

Thanks for the great information and the link. I have ready a little about the process before, and they do agree that proper preparation and use is the key. Thanks again!

Tim
 

bossvette

Gone but not forgotten
Joined
May 19, 2003
Messages
3,233
Location
West Unity Ohio
Corvette
1968 1997
the stuff they use is made by magnaflux and is called spot check
SKL-SP1 is the penetrant
SKD-S2 is the developer

you clean the area with a spray cleaner simular to brake-kleen
then spray the penatrant and let it sit for 5-15 minutes then wipe off excess
then spray the developer which reveals any cracks

pretty much the same as the stuff in the previous post
 

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