Quote:
Originally Posted by abneynormal
for those of us with cast wheels here is something to make your day. we have had a tire leaking down, even before we got rid of our st tires. I always check my tires before we roll somewhere so I could judge the leak. it has been getting worse. so I took it off and the tire place found it this time. it is the wheel. now to see if the extended warranty will make it up on our 2011 3912lev? so if you have aluminum mags and one leaks check the wheel too
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Porosity is a known issue with any type of casting especially steel and AL. I use to see it all the time when working with castings. The only way to resolve this casting flaw is either to change the pattern, redesign so the material will flow better and chill slower or use a chemical induced sealer on the parent material. The Porosity is still there and the casting can still fail through this casting flaw but it is seal against leaks of any types.
This is why I still order stamp steel wheels painted white or clad in some form of chrome covering, may not look the best but no casting flaws. Thirty years of working with and designing castings and forgings for earthmoving machines.
Jim W.