I've got riveted centers in the wheels on my 2 ton, no extra care was taken to seal them and they don't leak. If you ever try to take one of them out you'll see how tight they really are...

Paint the inside and run them, if you have an issue find out where and use some RTV. I've read that RTV is what the factory recommends for pin holes in aluminum wheels on new vehicles.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-