Paint crack on windshield pillars, both sides

[jimynick]

For my  worth, the A pillars are too small on these cars and the joint is poorly configured/welded/finished. If it never moved or drove down the road after painting, it might last, but these cars flex- a lot, and that's what makes that joint crack. If you're hoping for a filler to prevent it, you're probably hoping in vain. A prior comment about welding a piece in is a pretty good one. Conversely, you could braze it up really well and use a die grinder and carbide burr to clean/shape it up, as well. Good luck 

[Topcat]

Don't braze it.

It cooks the metal and then it'll rust.
Lead is your best bet.

[jimynick]

Don't braze it.

It cooks the metal and then it'll rust.
Lead is your best bet.

  Mike, what's the difference in "cooking the metal" between brazing and migging? Lead or more properly, solder, will not prevent cracking in a moving joint. It's better than plastic, but it'll fail, too. I've welded hundreds, if not thousands of patches on cars with brass and never saw it to cause rusting if the repaired area is prepared properly. But, like everything, that's just my  . 

[Topcat]

  Mike, what's the difference in "cooking the metal" between brazing and migging? Lead or more properly, solder, will not prevent cracking in a moving joint. It's better than plastic, but it'll fail, too. I've welded hundreds, if not thousands of patches on cars with brass and never saw it to cause rusting if the repaired area is prepared properly. But, like everything, that's just my  . 

Before I did lead it was brazed on the A pillars. The metal there was overheated and then it was weakened and began to rust. The metal was alright beforehand. That's just my observation.

[E-Body Products]

Be careful of dissimilar metals.

Some metals, especially those with significant contents of nickel and chromium, are included in the table in both their active and passive conditions. Passivation, (i.e.: surface cleaning and sealing) lowers the metals electrical potential and improves its corrosion behavior. As the series suggests, steel and aluminum are relatively compatible, but if brass and steel contact, the steel will corrode because it is more anodic than the brass.  Source: Fastenal Engineering

I don't think overheating can cause the issue, but brazing with brass is the true culprit.   Hope this helps.

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